/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:41:38,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:41:38,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:41:38,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:41:38,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:41:38,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:41:38,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:41:38,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:41:38,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:41:38,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:41:38,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:41:38,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:41:38,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:41:38,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:41:38,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:41:38,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:41:38,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:41:38,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:41:38,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:41:38,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:41:38,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:41:38,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:41:38,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:41:38,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:41:38,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:41:38,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:41:38,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:41:38,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:41:38,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:41:38,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:41:38,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:41:38,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:41:38,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:41:38,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:41:38,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:41:38,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:41:38,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:41:38,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:41:38,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:41:38,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:41:38,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:41:38,174 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 11:41:38,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:41:38,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:41:38,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:41:38,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:41:38,200 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:41:38,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:41:38,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:41:38,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:41:38,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:41:38,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:41:38,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:41:38,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:41:38,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:41:38,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:41:38,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:41:38,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:41:38,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:41:38,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:41:38,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:41:38,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:41:38,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:41:38,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:38,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:41:38,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:41:38,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:41:38,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:41:38,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:41:38,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:41:38,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:41:38,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:41:38,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:41:38,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:41:38,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:41:38,542 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:41:38,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-16 11:41:38,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a50ed9ef5/b375aebbf8d949b9b320ca62b5562245/FLAG89d590d2b [2020-10-16 11:41:39,195 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:41:39,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-16 11:41:39,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a50ed9ef5/b375aebbf8d949b9b320ca62b5562245/FLAG89d590d2b [2020-10-16 11:41:39,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a50ed9ef5/b375aebbf8d949b9b320ca62b5562245 [2020-10-16 11:41:39,516 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:41:39,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:41:39,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:39,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:41:39,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:41:39,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76250f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39, skipping insertion in model container [2020-10-16 11:41:39,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:41:39,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:41:40,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:40,064 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:41:40,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:40,240 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:41:40,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40 WrapperNode [2020-10-16 11:41:40,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:40,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:40,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:41:40,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:41:40,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:40,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:41:40,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:41:40,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:41:40,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (1/1) ... [2020-10-16 11:41:40,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:41:40,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:41:40,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:41:40,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:41:40,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (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 11:41:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:41:40,381 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:41:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:41:40,382 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:41:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:41:40,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:41:40,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:41:40,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:41:40,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:41:40,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:41:40,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:41:40,387 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 11:41:40,758 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:41:40,759 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:41:40,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:40 BoogieIcfgContainer [2020-10-16 11:41:40,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:41:40,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:41:40,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:41:40,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:41:40,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:41:39" (1/3) ... [2020-10-16 11:41:40,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bcf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:40, skipping insertion in model container [2020-10-16 11:41:40,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:40" (2/3) ... [2020-10-16 11:41:40,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bcf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:40, skipping insertion in model container [2020-10-16 11:41:40,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:40" (3/3) ... [2020-10-16 11:41:40,769 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-16 11:41:40,781 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:41:40,781 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:41:40,787 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:41:40,788 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:41:40,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,814 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,814 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,818 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,818 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,819 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,822 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,822 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,822 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,826 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,826 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,826 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,827 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,827 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,827 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,833 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,833 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,833 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,834 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,834 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,834 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:40,836 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:41:40,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:41:40,871 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:41:40,871 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:41:40,871 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:41:40,871 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:41:40,872 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:41:40,872 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:41:40,872 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:41:40,872 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:41:40,884 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:41:40,885 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:40,888 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:40,890 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:40,927 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 11:41:40,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:41:40,933 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 11:41:40,936 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 11:41:42,016 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 11:41:42,016 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 11:41:42,023 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:41:42,036 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:41:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:41:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:41:42,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 11:41:42,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146092008] [2020-10-16 11:41:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,286 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 11:41:42,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146092008] [2020-10-16 11:41:42,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:41:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381137942] [2020-10-16 11:41:42,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:41:42,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:41:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:41:42,329 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:41:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,402 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 11:41:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:41:42,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:41:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,417 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:42,417 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:41:42,418 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 11:41:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:41:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:41:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 11:41:42,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 11:41:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,461 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 11:41:42,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:41:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 11:41:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:41:42,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:41:42,463 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 11:41:42,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145144611] [2020-10-16 11:41:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,549 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 11:41:42,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145144611] [2020-10-16 11:41:42,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:41:42,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148388352] [2020-10-16 11:41:42,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:41:42,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:41:42,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:42,554 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 11:41:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,585 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 11:41:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:41:42,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:41:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,587 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:42,588 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:42,588 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 11:41:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 11:41:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 11:41:42,596 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 11:41:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,598 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 11:41:42,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:41:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 11:41:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:41:42,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 11:41:42,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416202683] [2020-10-16 11:41:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,677 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 11:41:42,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416202683] [2020-10-16 11:41:42,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:42,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428566784] [2020-10-16 11:41:42,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:42,679 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 11:41:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,757 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 11:41:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:42,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,760 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:42,760 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:42,761 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 11:41:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 11:41:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:42,770 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 11:41:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:42,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:41:42,772 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 11:41:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599318706] [2020-10-16 11:41:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,856 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 11:41:42,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599318706] [2020-10-16 11:41:42,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877272673] [2020-10-16 11:41:42,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:42,859 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 11:41:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,926 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:42,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,927 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:42,927 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:42,928 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 11:41:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 11:41:42,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 11:41:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,934 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 11:41:42,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 11:41:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:41:42,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,936 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 11:41:42,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083446710] [2020-10-16 11:41:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,002 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 11:41:43,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083446710] [2020-10-16 11:41:43,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:43,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:43,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293345603] [2020-10-16 11:41:43,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:43,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:43,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:43,008 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 11:41:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,097 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 11:41:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:43,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,100 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:41:43,100 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:41:43,101 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 11:41:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:41:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 11:41:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:43,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 11:41:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,109 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:43,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:43,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,110 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:41:43,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 11:41:43,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062576142] [2020-10-16 11:41:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,176 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 11:41:43,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062576142] [2020-10-16 11:41:43,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77090591] [2020-10-16 11:41:43,177 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 11:41:43,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:43,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388918401] [2020-10-16 11:41:43,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:43,301 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 11:41:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,411 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 11:41:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:43,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,413 INFO L225 Difference]: With dead ends: 48 [2020-10-16 11:41:43,413 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:43,413 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 11:41:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 11:41:43,418 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 11:41:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,419 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 11:41:43,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 11:41:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:43,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,420 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:41:43,633 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 11:41:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681937004] [2020-10-16 11:41:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,754 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 11:41:43,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681937004] [2020-10-16 11:41:43,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896972853] [2020-10-16 11:41:43,755 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 11:41:43,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:43,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,840 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 11:41:43,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:43,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290778566] [2020-10-16 11:41:43,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:43,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:43,844 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 11:41:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,917 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:43,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,918 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:43,918 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:43,919 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 11:41:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 11:41:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 11:41:43,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 11:41:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,929 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 11:41:43,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 11:41:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:43,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,930 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,143 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 11:41:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996738696] [2020-10-16 11:41:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,205 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 11:41:44,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996738696] [2020-10-16 11:41:44,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816943369] [2020-10-16 11:41:44,206 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 11:41:44,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:44,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:44,327 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 11:41:44,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:44,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61986897] [2020-10-16 11:41:44,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:44,330 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 11:41:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,447 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 11:41:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:41:44,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,448 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:44,449 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:41:44,449 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 11:41:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:41:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 11:41:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:44,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 11:41:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,454 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:44,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:44,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,455 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,668 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 11:41:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293307828] [2020-10-16 11:41:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,721 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 11:41:44,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293307828] [2020-10-16 11:41:44,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423353653] [2020-10-16 11:41:44,722 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 11:41:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,820 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 11:41:44,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803478478] [2020-10-16 11:41:44,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:44,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:44,823 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 11:41:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,989 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:44,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,992 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:44,992 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:44,992 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 11:41:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 11:41:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 11:41:44,998 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 11:41:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,998 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 11:41:44,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 11:41:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:45,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,000 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:45,212 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 11:41:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329900747] [2020-10-16 11:41:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329900747] [2020-10-16 11:41:45,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691546220] [2020-10-16 11:41:45,267 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 11:41:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,381 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 11:41:45,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:45,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510344842] [2020-10-16 11:41:45,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:45,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:45,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:45,384 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 11:41:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,563 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 11:41:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:45,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,564 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:45,564 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:45,564 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 11:41:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 11:41:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 11:41:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 11:41:45,572 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 11:41:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,573 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 11:41:45,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 11:41:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:45,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,574 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:41:45,785 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 11:41:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201840156] [2020-10-16 11:41:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,847 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 11:41:45,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201840156] [2020-10-16 11:41:45,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014924575] [2020-10-16 11:41:45,848 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 11:41:45,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,934 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 11:41:45,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:45,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211372365] [2020-10-16 11:41:45,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:45,936 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 11:41:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,042 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 11:41:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:46,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,043 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:46,043 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:41:46,046 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 11:41:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:41:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 11:41:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 11:41:46,057 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 11:41:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,057 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 11:41:46,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 11:41:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:46,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,262 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 11:41:46,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206976615] [2020-10-16 11:41:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,327 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 11:41:46,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206976615] [2020-10-16 11:41:46,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204008608] [2020-10-16 11:41:46,328 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 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 11:41:46,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:46,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:46,420 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 11:41:46,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751126117] [2020-10-16 11:41:46,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:46,422 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 11:41:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,599 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 11:41:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:46,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,605 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:41:46,605 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:46,606 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 11:41:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 11:41:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:46,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 11:41:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,610 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:46,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:46,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,821 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 11:41:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341174256] [2020-10-16 11:41:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,880 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 11:41:46,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341174256] [2020-10-16 11:41:46,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339156960] [2020-10-16 11:41:46,881 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 11:41:46,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:46,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676009975] [2020-10-16 11:41:46,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:46,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:46,956 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 11:41:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,162 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:47,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,164 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:47,164 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:47,165 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 11:41:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 11:41:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 11:41:47,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 11:41:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,184 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 11:41:47,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 11:41:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:41:47,386 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 11:41:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304352123] [2020-10-16 11:41:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,436 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 11:41:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304352123] [2020-10-16 11:41:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125091261] [2020-10-16 11:41:47,436 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 11:41:47,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:47,511 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 11:41:47,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:47,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245634093] [2020-10-16 11:41:47,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:47,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:47,513 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 11:41:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,685 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-16 11:41:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:47,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,686 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:47,686 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:47,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-16 11:41:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 11:41:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 11:41:47,690 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 11:41:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,690 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 11:41:47,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 11:41:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:47,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:47,901 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 11:41:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668345783] [2020-10-16 11:41:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,955 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 11:41:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668345783] [2020-10-16 11:41:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615442850] [2020-10-16 11:41:47,956 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 11:41:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,054 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 11:41:48,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559644831] [2020-10-16 11:41:48,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:48,056 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 11:41:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,227 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 11:41:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:48,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,229 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:48,229 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:48,230 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 11:41:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 11:41:48,233 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 11:41:48,234 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 11:41:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,234 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 11:41:48,235 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 11:41:48,447 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 11:41:48,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064362468] [2020-10-16 11:41:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,504 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 11:41:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064362468] [2020-10-16 11:41:48,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656122833] [2020-10-16 11:41:48,505 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 11:41:48,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:48,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,573 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 11:41:48,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:48,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037172315] [2020-10-16 11:41:48,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:48,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:48,575 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 11:41:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,781 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 11:41:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:48,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,783 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:48,783 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:41:48,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:41:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 11:41:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 11:41:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 11:41:48,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 11:41:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,788 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 11:41:48,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 11:41:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,789 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:41:48,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 11:41:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402204879] [2020-10-16 11:41:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,063 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 11:41:49,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402204879] [2020-10-16 11:41:49,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649855029] [2020-10-16 11:41:49,064 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 11:41:49,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,142 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 11:41:49,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571242025] [2020-10-16 11:41:49,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:49,144 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 11:41:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,247 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 11:41:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:49,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,249 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:49,249 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:49,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:41:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 11:41:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 11:41:49,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 11:41:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,256 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 11:41:49,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 11:41:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:49,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,256 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:41:49,458 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 11:41:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822651778] [2020-10-16 11:41:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,528 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 11:41:49,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822651778] [2020-10-16 11:41:49,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568639177] [2020-10-16 11:41:49,529 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 11:41:49,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:49,639 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 11:41:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445250400] [2020-10-16 11:41:49,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:49,641 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 11:41:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,766 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 11:41:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:49,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,767 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:49,767 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:49,767 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 11:41:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 11:41:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:49,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 11:41:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,770 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:49,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:49,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,771 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:41:49,972 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 11:41:49,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527268369] [2020-10-16 11:41:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,036 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 11:41:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527268369] [2020-10-16 11:41:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377364763] [2020-10-16 11:41:50,037 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 11:41:50,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60120386] [2020-10-16 11:41:50,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:50,093 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 11:41:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,268 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 11:41:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:50,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,269 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:50,269 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:50,270 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 11:41:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 11:41:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 11:41:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 11:41:50,274 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 11:41:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,274 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 11:41:50,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 11:41:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:50,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,477 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 11:41:50,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91015911] [2020-10-16 11:41:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91015911] [2020-10-16 11:41:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562021881] [2020-10-16 11:41:50,562 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 11:41:50,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:50,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701753667] [2020-10-16 11:41:50,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:50,652 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 11:41:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,875 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 11:41:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:50,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,876 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:50,876 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:50,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 11:41:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:50,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 11:41:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,880 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:50,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:50,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,881 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,091 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 11:41:51,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364113307] [2020-10-16 11:41:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,148 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 11:41:51,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364113307] [2020-10-16 11:41:51,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651578887] [2020-10-16 11:41:51,149 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 11:41:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:51,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841919879] [2020-10-16 11:41:51,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:51,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:51,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:51,216 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 11:41:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,398 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:41:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:51,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,399 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:41:51,399 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:41:51,400 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 11:41:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:41:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 11:41:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 11:41:51,403 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 11:41:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,403 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 11:41:51,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 11:41:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:51,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,404 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,616 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 11:41:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137249843] [2020-10-16 11:41:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,669 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 11:41:51,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137249843] [2020-10-16 11:41:51,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725203256] [2020-10-16 11:41:51,670 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 11:41:51,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:51,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:51,769 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 11:41:51,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:51,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115786198] [2020-10-16 11:41:51,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:51,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:51,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:51,771 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 11:41:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,026 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 11:41:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:52,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,028 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:52,028 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:52,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 11:41:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:41:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 11:41:52,032 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 11:41:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,032 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 11:41:52,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 11:41:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:41:52,245 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 11:41:52,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96673556] [2020-10-16 11:41:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,321 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 11:41:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96673556] [2020-10-16 11:41:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256688297] [2020-10-16 11:41:52,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:52,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,380 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 11:41:52,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:52,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016800935] [2020-10-16 11:41:52,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:52,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:52,382 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 11:41:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,538 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 11:41:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:52,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,539 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:52,539 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:52,540 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 11:41:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 11:41:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:52,543 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,544 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:52,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:52,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:41:52,754 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 11:41:52,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210778843] [2020-10-16 11:41:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210778843] [2020-10-16 11:41:52,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617430716] [2020-10-16 11:41:52,856 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 11:41:52,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:52,944 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 11:41:52,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982904634] [2020-10-16 11:41:52,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:52,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:52,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:52,947 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,137 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 11:41:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:53,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,138 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:41:53,138 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:41:53,139 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 11:41:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:41:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 11:41:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:53,142 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,142 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:53,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:53,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:41:53,353 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 11:41:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747198821] [2020-10-16 11:41:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747198821] [2020-10-16 11:41:53,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585675447] [2020-10-16 11:41:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:53,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,514 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 11:41:53,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197659792] [2020-10-16 11:41:53,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:53,516 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,687 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 11:41:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:53,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,689 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:53,689 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:53,690 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 11:41:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 11:41:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:53,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,693 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:53,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:53,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:41:53,904 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 11:41:53,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368306338] [2020-10-16 11:41:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,967 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 11:41:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368306338] [2020-10-16 11:41:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95124814] [2020-10-16 11:41:53,968 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 11:41:54,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:54,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376275323] [2020-10-16 11:41:54,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:54,049 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,331 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 11:41:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:54,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,333 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:54,333 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:54,334 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 11:41:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 11:41:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:54,337 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,337 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:54,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:54,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:41:54,539 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 11:41:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992728341] [2020-10-16 11:41:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,631 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 11:41:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992728341] [2020-10-16 11:41:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072115423] [2020-10-16 11:41:54,632 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 11:41:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:54,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854020580] [2020-10-16 11:41:54,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:54,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:54,695 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,924 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:41:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:54,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,926 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:54,926 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:41:54,926 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 11:41:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:41:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 11:41:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:41:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 11:41:54,929 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 11:41:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,930 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 11:41:54,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 11:41:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:54,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:55,140 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 11:41:55,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512261111] [2020-10-16 11:41:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,208 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 11:41:55,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512261111] [2020-10-16 11:41:55,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354739705] [2020-10-16 11:41:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:55,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399857458] [2020-10-16 11:41:55,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:55,278 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 11:41:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,542 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-16 11:41:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:55,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,543 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:55,543 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:55,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-16 11:41:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 11:41:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 11:41:55,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 11:41:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,546 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 11:41:55,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 11:41:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:55,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,547 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:41:55,756 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 11:41:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227340554] [2020-10-16 11:41:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227340554] [2020-10-16 11:41:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665642154] [2020-10-16 11:41:55,816 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 11:41:55,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:55,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:55,888 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 11:41:55,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:55,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357653496] [2020-10-16 11:41:55,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:55,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:55,890 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 11:41:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,171 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 11:41:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:56,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,173 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:56,173 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:56,174 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 11:41:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 11:41:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:56,176 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 11:41:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,177 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:56,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:56,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,178 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:41:56,387 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 11:41:56,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66645941] [2020-10-16 11:41:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,464 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 11:41:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66645941] [2020-10-16 11:41:56,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555303494] [2020-10-16 11:41:56,465 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 11:41:56,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:56,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:56,560 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 11:41:56,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698936204] [2020-10-16 11:41:56,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:56,561 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 11:41:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,857 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 11:41:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:56,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,859 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:56,859 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:56,860 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 11:41:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 11:41:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 11:41:56,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 11:41:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,864 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 11:41:56,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 11:41:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:56,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,864 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,075 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 11:41:57,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612486525] [2020-10-16 11:41:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,168 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 11:41:57,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612486525] [2020-10-16 11:41:57,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917547768] [2020-10-16 11:41:57,169 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 11:41:57,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:57,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,229 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 11:41:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916444505] [2020-10-16 11:41:57,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:57,230 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 11:41:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,376 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 11:41:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:57,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,378 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:57,378 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:57,379 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 11:41:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 11:41:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 11:41:57,382 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 11:41:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,382 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 11:41:57,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 11:41:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:57,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,383 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,586 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 11:41:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265362570] [2020-10-16 11:41:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,679 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 11:41:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265362570] [2020-10-16 11:41:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027860984] [2020-10-16 11:41:57,680 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 11:41:57,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:57,757 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 11:41:57,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962528104] [2020-10-16 11:41:57,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:57,764 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 11:41:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,941 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 11:41:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:57,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,943 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:57,943 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:57,943 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 11:41:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 11:41:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 11:41:57,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 11:41:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,948 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 11:41:57,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 11:41:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:57,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,949 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:41:58,159 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 11:41:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572819107] [2020-10-16 11:41:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,235 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 11:41:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572819107] [2020-10-16 11:41:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170085529] [2020-10-16 11:41:58,236 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 11:41:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,304 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 11:41:58,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057663649] [2020-10-16 11:41:58,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:58,307 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 11:41:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,514 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 11:41:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:58,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,515 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:58,516 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:58,516 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 11:41:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 11:41:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:58,520 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 11:41:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,520 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:58,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:58,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,521 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:58,722 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 11:41:58,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685094397] [2020-10-16 11:41:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,805 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 11:41:58,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685094397] [2020-10-16 11:41:58,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768227712] [2020-10-16 11:41:58,806 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 11:41:58,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:58,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:58,886 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 11:41:58,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630068677] [2020-10-16 11:41:58,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:58,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:58,888 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 11:41:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,153 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 11:41:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:59,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,155 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:59,155 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:59,155 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 11:41:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 11:41:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:59,158 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 11:41:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,158 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:59,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:59,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,159 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:41:59,360 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 11:41:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883795318] [2020-10-16 11:41:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,451 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 11:41:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883795318] [2020-10-16 11:41:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900449294] [2020-10-16 11:41:59,452 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 11:41:59,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:59,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,554 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 11:41:59,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018284463] [2020-10-16 11:41:59,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:59,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:59,557 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 11:41:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,832 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 11:41:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:59,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,833 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:59,833 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:59,833 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 11:41:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 11:41:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:41:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 11:41:59,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 11:41:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,836 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 11:41:59,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 11:41:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:59,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,837 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,046 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 11:42:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031079472] [2020-10-16 11:42:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,127 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 11:42:00,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031079472] [2020-10-16 11:42:00,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218562555] [2020-10-16 11:42:00,128 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 11:42:00,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:00,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:00,202 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 11:42:00,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:42:00,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146275567] [2020-10-16 11:42:00,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:00,204 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 11:42:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,519 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 11:42:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:00,519 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:42:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,520 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:00,520 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:42:00,521 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 11:42:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:42:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 11:42:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:42:00,524 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 11:42:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,525 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:42:00,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:42:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:42:00,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,526 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:42:00,734 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 11:42:00,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531293322] [2020-10-16 11:42:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,826 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 11:42:00,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531293322] [2020-10-16 11:42:00,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459072143] [2020-10-16 11:42:00,827 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 11:42:00,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:42:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,885 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 11:42:00,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:42:00,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556996114] [2020-10-16 11:42:00,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:42:00,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:42:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:42:00,886 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 11:42:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,195 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 11:42:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:01,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:42:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,196 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:01,196 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:01,197 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 11:42:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 11:42:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 11:42:01,200 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 11:42:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,200 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 11:42:01,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:42:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 11:42:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:42:01,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,201 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:42:01,410 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,410 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 11:42:01,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375079016] [2020-10-16 11:42:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,491 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 11:42:01,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375079016] [2020-10-16 11:42:01,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174723891] [2020-10-16 11:42:01,492 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 11:42:01,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:42:01,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:01,568 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 11:42:01,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:42:01,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146015455] [2020-10-16 11:42:01,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:01,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:01,570 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 11:42:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,912 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 11:42:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:01,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:42:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,913 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:42:01,913 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:42:01,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:42:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 11:42:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 11:42:01,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 11:42:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,917 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 11:42:01,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 11:42:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:01,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:42:02,128 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 11:42:02,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535525711] [2020-10-16 11:42:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,236 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 11:42:02,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535525711] [2020-10-16 11:42:02,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866944451] [2020-10-16 11:42:02,237 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 11:42:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,294 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 11:42:02,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894902452] [2020-10-16 11:42:02,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:02,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:02,295 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 11:42:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,473 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:02,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,475 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:02,475 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:02,475 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 11:42:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:42:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:02,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,478 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:02,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:02,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:42:02,690 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 11:42:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213170394] [2020-10-16 11:42:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,810 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 11:42:02,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213170394] [2020-10-16 11:42:02,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059190691] [2020-10-16 11:42:02,811 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 11:42:02,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:02,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:02,897 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 11:42:02,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:02,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154228015] [2020-10-16 11:42:02,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:02,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:02,899 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,156 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 11:42:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:03,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,158 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:42:03,158 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:42:03,159 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 11:42:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:42:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 11:42:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:03,162 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,162 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:03,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:03,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,163 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:42:03,372 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 11:42:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904304178] [2020-10-16 11:42:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,456 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 11:42:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904304178] [2020-10-16 11:42:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222688060] [2020-10-16 11:42:03,457 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 11:42:03,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,523 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 11:42:03,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:03,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893956823] [2020-10-16 11:42:03,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:03,525 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,761 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:42:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:03,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,763 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:03,763 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:03,763 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 11:42:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 11:42:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:03,766 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,766 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:03,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:03,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:42:03,976 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 11:42:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876668145] [2020-10-16 11:42:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,079 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 11:42:04,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876668145] [2020-10-16 11:42:04,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395534766] [2020-10-16 11:42:04,080 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 11:42:04,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:04,153 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 11:42:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102855833] [2020-10-16 11:42:04,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:04,155 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,488 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:42:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:04,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,490 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:42:04,490 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:04,490 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 11:42:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 11:42:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:04,493 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,493 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:04,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:04,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,495 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:04,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:42:04,703 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 11:42:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:04,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427444345] [2020-10-16 11:42:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,789 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 11:42:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427444345] [2020-10-16 11:42:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99956365] [2020-10-16 11:42:04,790 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 11:42:04,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:42:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,882 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 11:42:04,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:04,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66015269] [2020-10-16 11:42:04,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:04,883 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,243 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 11:42:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:05,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,245 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:42:05,245 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:42:05,245 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 11:42:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:42:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 11:42:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:05,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,249 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:05,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,458 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,459 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 11:42:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789564012] [2020-10-16 11:42:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,546 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 11:42:05,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789564012] [2020-10-16 11:42:05,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150860235] [2020-10-16 11:42:05,547 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 11:42:05,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:42:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:05,622 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 11:42:05,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593179421] [2020-10-16 11:42:05,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:05,625 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,001 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 11:42:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:06,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,003 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:42:06,003 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:06,004 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 11:42:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 11:42:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:06,006 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,007 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:06,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:06,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:42:06,210 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 11:42:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623532274] [2020-10-16 11:42:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,292 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 11:42:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623532274] [2020-10-16 11:42:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439051389] [2020-10-16 11:42:06,293 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 11:42:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,393 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 11:42:06,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345306064] [2020-10-16 11:42:06,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:06,395 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,752 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:06,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,754 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:06,754 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:06,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 11:42:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 11:42:06,759 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 11:42:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 11:42:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 11:42:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:06,971 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 11:42:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872012196] [2020-10-16 11:42:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,041 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 11:42:07,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872012196] [2020-10-16 11:42:07,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056326704] [2020-10-16 11:42:07,041 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 11:42:07,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:07,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719941828] [2020-10-16 11:42:07,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:07,141 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 11:42:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,558 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-16 11:42:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:07,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,559 INFO L225 Difference]: With dead ends: 70 [2020-10-16 11:42:07,559 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:42:07,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:42:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-16 11:42:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:42:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 11:42:07,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 11:42:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,564 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 11:42:07,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 11:42:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:07,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,565 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:42:07,767 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 11:42:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349200176] [2020-10-16 11:42:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,847 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 11:42:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349200176] [2020-10-16 11:42:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707784123] [2020-10-16 11:42:07,848 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 11:42:07,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:07,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:07,980 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 11:42:07,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805251468] [2020-10-16 11:42:07,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:07,983 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 11:42:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:08,356 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 11:42:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:08,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:08,357 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:08,357 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:08,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 11:42:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:08,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 11:42:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:08,360 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:08,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:08,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:08,361 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:08,568 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 11:42:08,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343732040] [2020-10-16 11:42:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,648 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 11:42:08,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343732040] [2020-10-16 11:42:08,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576759513] [2020-10-16 11:42:08,649 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 11:42:08,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:08,726 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 11:42:08,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:08,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198574327] [2020-10-16 11:42:08,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:08,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:08,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:08,728 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 11:42:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,142 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 11:42:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:09,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,144 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:42:09,144 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:42:09,144 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 11:42:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:42:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 11:42:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:42:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 11:42:09,147 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 11:42:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,147 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 11:42:09,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 11:42:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:09,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,148 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:42:09,357 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 11:42:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492304513] [2020-10-16 11:42:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:09,461 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 11:42:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492304513] [2020-10-16 11:42:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461434851] [2020-10-16 11:42:09,462 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 11:42:09,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:09,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,523 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 11:42:09,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701077477] [2020-10-16 11:42:09,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:09,525 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 11:42:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,728 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 11:42:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:09,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,729 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:09,729 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:09,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:42:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 11:42:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 11:42:09,733 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 11:42:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,733 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 11:42:09,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 11:42:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:09,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,734 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:42:09,945 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 11:42:09,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233332552] [2020-10-16 11:42:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,064 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 11:42:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233332552] [2020-10-16 11:42:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441754375] [2020-10-16 11:42:10,065 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 11:42:10,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:10,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:10,135 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 11:42:10,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:10,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641164095] [2020-10-16 11:42:10,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:10,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:10,137 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 11:42:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:10,352 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 11:42:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:10,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:10,353 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:10,353 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:42:10,354 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 11:42:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:42:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 11:42:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 11:42:10,356 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 11:42:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:10,356 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 11:42:10,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 11:42:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:10,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:10,357 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:42:10,558 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 11:42:10,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735134461] [2020-10-16 11:42:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,663 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 11:42:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735134461] [2020-10-16 11:42:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574608165] [2020-10-16 11:42:10,663 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 11:42:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,752 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 11:42:10,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:10,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534674116] [2020-10-16 11:42:10,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:10,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:10,754 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 11:42:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,038 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 11:42:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:11,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,039 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:11,039 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:11,040 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 11:42:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 11:42:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 11:42:11,042 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 11:42:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,042 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 11:42:11,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 11:42:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,043 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:42:11,250 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 11:42:11,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237139246] [2020-10-16 11:42:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,373 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 11:42:11,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237139246] [2020-10-16 11:42:11,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065269440] [2020-10-16 11:42:11,374 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 11:42:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:11,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:11,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:11,455 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 11:42:11,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:11,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:11,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390010507] [2020-10-16 11:42:11,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:11,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:11,458 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 11:42:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,754 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 11:42:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:11,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,759 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:11,759 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:11,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 11:42:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 11:42:11,761 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 11:42:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,762 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 11:42:11,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 11:42:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:11,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,762 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:11,963 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 11:42:11,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297078180] [2020-10-16 11:42:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,061 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 11:42:12,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297078180] [2020-10-16 11:42:12,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471410870] [2020-10-16 11:42:12,062 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 11:42:12,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,119 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 11:42:12,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:12,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574684714] [2020-10-16 11:42:12,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:12,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:12,121 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 11:42:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:12,407 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 11:42:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:12,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:12,409 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:12,409 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:12,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 11:42:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:12,413 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 11:42:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:12,414 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:12,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:12,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:12,414 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:12,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,624 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 11:42:12,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:12,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612535743] [2020-10-16 11:42:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,710 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 11:42:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612535743] [2020-10-16 11:42:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965960963] [2020-10-16 11:42:12,711 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 11:42:12,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:12,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:12,792 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 11:42:12,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:12,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326358278] [2020-10-16 11:42:12,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:12,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:12,794 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 11:42:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,163 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 11:42:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:13,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,165 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:13,165 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:13,165 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 11:42:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 11:42:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:13,167 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 11:42:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,168 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:13,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:13,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,168 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:13,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:42:13,377 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 11:42:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:13,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790453609] [2020-10-16 11:42:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:13,466 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 11:42:13,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790453609] [2020-10-16 11:42:13,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634403646] [2020-10-16 11:42:13,467 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 11:42:13,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:13,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:13,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:13,539 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 11:42:13,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:13,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:13,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492893762] [2020-10-16 11:42:13,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:13,541 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 11:42:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,849 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 11:42:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:13,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,851 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:13,851 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:13,851 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 11:42:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 11:42:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 11:42:13,855 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 11:42:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,855 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 11:42:13,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 11:42:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:13,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,856 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:14,064 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 11:42:14,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249227606] [2020-10-16 11:42:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,151 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 11:42:14,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249227606] [2020-10-16 11:42:14,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931679403] [2020-10-16 11:42:14,151 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 11:42:14,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:14,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:14,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:14,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:14,240 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 11:42:14,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:14,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117249231] [2020-10-16 11:42:14,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:14,242 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 11:42:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:14,672 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 11:42:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:14,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:14,674 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:14,674 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:14,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 11:42:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:14,677 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 11:42:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:14,677 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:14,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:14,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:14,678 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:42:14,888 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 11:42:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178219163] [2020-10-16 11:42:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,977 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 11:42:14,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178219163] [2020-10-16 11:42:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585642709] [2020-10-16 11:42:14,978 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 11:42:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,038 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 11:42:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720899611] [2020-10-16 11:42:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:15,040 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 11:42:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:15,395 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:15,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:15,396 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:15,397 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:15,397 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 11:42:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 11:42:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 11:42:15,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 11:42:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:15,401 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 11:42:15,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 11:42:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:15,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:15,402 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:15,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:42:15,608 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 11:42:15,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:15,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532060063] [2020-10-16 11:42:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,684 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 11:42:15,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532060063] [2020-10-16 11:42:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463934061] [2020-10-16 11:42:15,685 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 11:42:15,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:15,774 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 11:42:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366569721] [2020-10-16 11:42:15,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:15,776 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 11:42:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:16,226 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 11:42:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:16,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:16,228 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:16,228 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:16,229 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 11:42:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 11:42:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 11:42:16,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 11:42:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:16,231 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 11:42:16,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 11:42:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:16,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:16,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:42:16,433 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 11:42:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:16,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484434137] [2020-10-16 11:42:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:16,547 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 11:42:16,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484434137] [2020-10-16 11:42:16,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195589796] [2020-10-16 11:42:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:16,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:16,608 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 11:42:16,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:16,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680202739] [2020-10-16 11:42:16,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:16,609 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 11:42:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:16,858 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:16,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:16,859 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:16,859 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:16,860 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 11:42:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 11:42:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:16,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:16,863 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:16,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:16,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:16,863 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:42:17,064 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 11:42:17,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608823884] [2020-10-16 11:42:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,182 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 11:42:17,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608823884] [2020-10-16 11:42:17,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193032515] [2020-10-16 11:42:17,183 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 11:42:17,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:17,254 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 11:42:17,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:17,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151042820] [2020-10-16 11:42:17,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:17,256 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:17,530 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 11:42:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:17,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:17,532 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:17,532 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:17,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:42:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:17,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:17,535 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:17,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:17,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:17,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:42:17,737 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 11:42:17,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506480664] [2020-10-16 11:42:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,870 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 11:42:17,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506480664] [2020-10-16 11:42:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596800107] [2020-10-16 11:42:17,871 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 11:42:17,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:17,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:17,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,971 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 11:42:17,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:17,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591482292] [2020-10-16 11:42:17,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:17,973 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:18,315 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:42:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:18,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:18,317 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:42:18,317 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:42:18,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:42:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 11:42:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:18,320 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:18,321 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:18,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:18,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:18,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:18,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,530 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 11:42:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:18,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536494016] [2020-10-16 11:42:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,644 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 11:42:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536494016] [2020-10-16 11:42:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595615571] [2020-10-16 11:42:18,645 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 11:42:18,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:18,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:18,725 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 11:42:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726976737] [2020-10-16 11:42:18,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:18,727 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,102 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 11:42:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:19,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,104 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:19,104 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:19,105 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 11:42:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 11:42:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:19,107 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,107 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:19,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,108 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:19,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:19,317 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 11:42:19,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:19,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664891135] [2020-10-16 11:42:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,432 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 11:42:19,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664891135] [2020-10-16 11:42:19,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654015657] [2020-10-16 11:42:19,433 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 11:42:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:19,502 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 11:42:19,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:19,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:19,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134844455] [2020-10-16 11:42:19,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:19,504 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,825 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:42:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:19,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,826 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:19,827 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:19,827 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 11:42:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 11:42:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:19,829 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,829 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:19,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:19,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 11:42:20,032 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 11:42:20,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431842562] [2020-10-16 11:42:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,133 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 11:42:20,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431842562] [2020-10-16 11:42:20,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394981804] [2020-10-16 11:42:20,133 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 11:42:20,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:20,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:20,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:20,220 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 11:42:20,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:20,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:20,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621273205] [2020-10-16 11:42:20,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:20,222 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,668 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:42:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:20,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:20,669 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:20,669 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:20,670 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 11:42:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 11:42:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:20,673 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:20,673 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:20,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:20,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:20,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,879 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 11:42:20,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084154682] [2020-10-16 11:42:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,982 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 11:42:20,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084154682] [2020-10-16 11:42:20,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370707043] [2020-10-16 11:42:20,983 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 11:42:21,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:21,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:21,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992564664] [2020-10-16 11:42:21,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:21,045 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:21,413 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 11:42:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:21,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:21,414 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:42:21,415 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:21,415 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 11:42:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 11:42:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:21,418 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:21,418 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:21,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:21,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:21,419 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:21,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 11:42:21,620 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 11:42:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487466465] [2020-10-16 11:42:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:21,720 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 11:42:21,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487466465] [2020-10-16 11:42:21,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85177525] [2020-10-16 11:42:21,721 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 11:42:21,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:21,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:21,807 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 11:42:21,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901399665] [2020-10-16 11:42:21,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:21,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:21,809 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:22,336 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 11:42:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:22,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:22,337 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:42:22,337 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:22,338 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 11:42:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 11:42:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:22,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:22,340 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:22,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:22,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:22,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:22,541 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 11:42:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512592768] [2020-10-16 11:42:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,642 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 11:42:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512592768] [2020-10-16 11:42:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851581776] [2020-10-16 11:42:22,643 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 11:42:22,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:22,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:22,715 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 11:42:22,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:22,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:22,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72528370] [2020-10-16 11:42:22,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:22,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:22,716 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,095 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:42:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:23,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:23,097 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:23,097 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:23,097 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 11:42:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 11:42:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 11:42:23,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 11:42:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:23,100 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 11:42:23,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 11:42:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:23,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:23,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:23,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 11:42:23,302 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 11:42:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:23,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849106072] [2020-10-16 11:42:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:23,395 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 11:42:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849106072] [2020-10-16 11:42:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602503375] [2020-10-16 11:42:23,396 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 11:42:23,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:23,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:23,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:23,474 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 11:42:23,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:23,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133962223] [2020-10-16 11:42:23,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:23,476 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 11:42:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,968 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-10-16 11:42:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:23,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:23,970 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:42:23,970 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:23,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-10-16 11:42:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:42:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 11:42:23,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 11:42:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:23,973 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 11:42:23,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 11:42:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:23,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:24,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:24,175 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 11:42:24,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:24,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230297193] [2020-10-16 11:42:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,273 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 11:42:24,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230297193] [2020-10-16 11:42:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13866540] [2020-10-16 11:42:24,274 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 11:42:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:24,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:24,356 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 11:42:24,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:24,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:24,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701647224] [2020-10-16 11:42:24,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:24,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:24,358 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 11:42:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:24,871 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 11:42:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:24,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,872 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:24,872 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:24,872 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 11:42:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 11:42:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:24,874 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 11:42:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,874 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:24,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:24,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,875 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:25,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 11:42:25,076 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 11:42:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:25,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397715848] [2020-10-16 11:42:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:25,177 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 11:42:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397715848] [2020-10-16 11:42:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539688864] [2020-10-16 11:42:25,178 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 11:42:25,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:25,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:25,253 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 11:42:25,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:25,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:25,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216526987] [2020-10-16 11:42:25,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:25,255 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 11:42:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:25,814 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 11:42:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:25,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:25,815 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:25,815 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:25,816 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 11:42:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 11:42:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:42:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 11:42:25,818 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 11:42:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:25,818 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 11:42:25,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 11:42:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:25,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:25,819 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:26,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:42:26,023 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 11:42:26,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:26,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355233802] [2020-10-16 11:42:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:26,173 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 11:42:26,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355233802] [2020-10-16 11:42:26,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711265894] [2020-10-16 11:42:26,173 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 11:42:26,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:26,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:26,229 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 11:42:26,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:26,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:26,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094449722] [2020-10-16 11:42:26,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:26,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:26,230 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 11:42:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:26,476 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 11:42:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:26,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:26,478 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:26,478 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:26,478 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 11:42:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 11:42:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 11:42:26,481 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 11:42:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:26,481 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 11:42:26,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 11:42:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:26,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:26,482 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:26,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:26,683 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 11:42:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:26,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600939024] [2020-10-16 11:42:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:26,832 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 11:42:26,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600939024] [2020-10-16 11:42:26,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48015991] [2020-10-16 11:42:26,833 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 11:42:26,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:26,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:26,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:26,915 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 11:42:26,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:26,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:26,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880749070] [2020-10-16 11:42:26,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:26,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:26,918 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 11:42:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:27,189 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 11:42:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:27,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:27,191 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:27,191 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:27,191 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 11:42:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 11:42:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 11:42:27,194 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 11:42:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:27,194 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 11:42:27,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 11:42:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:27,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:27,195 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:27,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,396 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 11:42:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:27,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793960597] [2020-10-16 11:42:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,527 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 11:42:27,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793960597] [2020-10-16 11:42:27,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906281040] [2020-10-16 11:42:27,528 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 11:42:27,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:27,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,590 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 11:42:27,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796990064] [2020-10-16 11:42:27,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:27,591 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 11:42:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:27,917 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 11:42:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:27,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:27,919 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:27,919 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:27,919 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 11:42:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 11:42:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 11:42:27,921 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 11:42:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:27,922 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 11:42:27,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 11:42:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:27,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:27,922 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:28,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,123 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 11:42:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:28,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012586453] [2020-10-16 11:42:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,245 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 11:42:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012586453] [2020-10-16 11:42:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360040532] [2020-10-16 11:42:28,246 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 11:42:28,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:28,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:28,383 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 11:42:28,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:28,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:28,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424293078] [2020-10-16 11:42:28,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:28,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:28,386 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 11:42:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:28,853 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 11:42:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:28,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:28,856 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:28,856 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:28,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 11:42:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 11:42:28,860 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 11:42:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:28,860 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 11:42:28,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 11:42:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:28,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:28,862 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:29,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,073 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 11:42:29,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:29,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842445959] [2020-10-16 11:42:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:29,253 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 11:42:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842445959] [2020-10-16 11:42:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220158506] [2020-10-16 11:42:29,254 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 11:42:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:29,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:29,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:29,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775275895] [2020-10-16 11:42:29,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:29,353 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 11:42:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:29,854 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:29,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:29,856 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:29,856 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:29,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 11:42:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 11:42:29,860 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 11:42:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:29,861 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 11:42:29,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 11:42:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:29,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:29,862 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 11:42:30,072 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 11:42:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001140970] [2020-10-16 11:42:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,200 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 11:42:30,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001140970] [2020-10-16 11:42:30,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264130839] [2020-10-16 11:42:30,201 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 11:42:30,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:30,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:30,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:30,276 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 11:42:30,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117395482] [2020-10-16 11:42:30,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:30,278 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 11:42:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:30,717 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 11:42:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:30,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:30,719 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:30,719 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:30,719 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 11:42:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 11:42:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 11:42:30,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 11:42:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:30,723 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 11:42:30,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 11:42:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:30,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:30,723 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,924 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 11:42:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334551863] [2020-10-16 11:42:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,036 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 11:42:31,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334551863] [2020-10-16 11:42:31,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841467366] [2020-10-16 11:42:31,037 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 11:42:31,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,097 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 11:42:31,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:31,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782279656] [2020-10-16 11:42:31,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:31,099 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 11:42:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:31,508 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 11:42:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:31,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:31,510 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:31,510 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:31,510 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 11:42:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 11:42:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:31,512 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 11:42:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:31,513 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:31,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:31,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:31,513 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:31,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 11:42:31,714 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 11:42:31,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:31,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785330433] [2020-10-16 11:42:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,824 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 11:42:31,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785330433] [2020-10-16 11:42:31,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835683347] [2020-10-16 11:42:31,825 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 11:42:31,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:31,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:31,940 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 11:42:31,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:31,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712491534] [2020-10-16 11:42:31,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:31,943 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 11:42:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:32,505 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:32,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:32,506 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:32,506 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:32,507 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 11:42:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 11:42:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:32,510 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 11:42:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:32,510 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:32,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:32,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:32,511 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:32,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:32,718 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 11:42:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:32,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816195529] [2020-10-16 11:42:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:32,833 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 11:42:32,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816195529] [2020-10-16 11:42:32,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957787927] [2020-10-16 11:42:32,834 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 11:42:32,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:32,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:32,896 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 11:42:32,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:32,896 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 [1787272683] [2020-10-16 11:42:32,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:32,897 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 11:42:32,897 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 11:42:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:33,343 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 11:42:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:33,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:33,344 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:33,344 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:33,345 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 11:42:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 11:42:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 11:42:33,348 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 11:42:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:33,348 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 11:42:33,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 11:42:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:33,349 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:33,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:42:33,555 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 11:42:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:33,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120008453] [2020-10-16 11:42:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:33,562 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 [1120008453] [2020-10-16 11:42:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800281230] [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 11:42:33,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:33,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:33,742 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 11:42:33,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:33,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394541587] [2020-10-16 11:42:33,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:33,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:33,743 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 11:42:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:34,298 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 11:42:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:34,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:34,300 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:34,300 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:42:34,301 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 11:42:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:42:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 11:42:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:34,307 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 11:42:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:34,307 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:34,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:34,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:34,308 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:34,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,516 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 11:42:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:34,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747936290] [2020-10-16 11:42:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,627 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 11:42:34,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747936290] [2020-10-16 11:42:34,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425445306] [2020-10-16 11:42:34,628 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 11:42:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:34,689 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 11:42:34,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:34,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:34,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427377143] [2020-10-16 11:42:34,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:34,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:34,691 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 11:42:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:35,169 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 11:42:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:35,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:35,171 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:42:35,171 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:42:35,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:42:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 11:42:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 11:42:35,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 11:42:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:35,174 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 11:42:35,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 11:42:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:35,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:35,175 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:35,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:35,380 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 11:42:35,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:35,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577937091] [2020-10-16 11:42:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:35,483 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 11:42:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577937091] [2020-10-16 11:42:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907290272] [2020-10-16 11:42:35,484 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 11:42:35,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:35,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:35,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:35,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:35,564 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 11:42:35,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:35,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:35,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699452425] [2020-10-16 11:42:35,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:35,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:35,566 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 11:42:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:36,155 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 11:42:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:36,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:36,157 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:36,157 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:36,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 11:42:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 11:42:36,160 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 11:42:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:36,160 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 11:42:36,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 11:42:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:36,161 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,362 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 11:42:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:36,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079430590] [2020-10-16 11:42:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:36,530 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 11:42:36,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079430590] [2020-10-16 11:42:36,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588047173] [2020-10-16 11:42:36,531 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 11:42:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:36,598 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 11:42:36,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:36,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673147714] [2020-10-16 11:42:36,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:36,600 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 11:42:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:36,905 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 11:42:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:36,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:36,906 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:36,907 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:36,907 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 11:42:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 11:42:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:36,910 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:36,910 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:36,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:36,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:36,911 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:37,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,120 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 11:42:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63902600] [2020-10-16 11:42:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:37,288 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 11:42:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63902600] [2020-10-16 11:42:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420905007] [2020-10-16 11:42:37,289 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 11:42:37,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:37,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:37,364 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 11:42:37,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:37,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:37,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191857525] [2020-10-16 11:42:37,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:37,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:37,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:37,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:37,365 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:37,751 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 11:42:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:37,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:37,752 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:37,753 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:37,753 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 11:42:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 11:42:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:37,756 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:37,756 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:37,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:37,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:37,756 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:37,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,957 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 11:42:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:37,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831455835] [2020-10-16 11:42:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,106 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 11:42:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831455835] [2020-10-16 11:42:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020634439] [2020-10-16 11:42:38,107 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 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 11:42:38,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:38,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:38,169 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 11:42:38,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:38,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:38,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650875858] [2020-10-16 11:42:38,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:38,171 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:38,531 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 11:42:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:38,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:38,532 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:38,532 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:38,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 11:42:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:38,536 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:38,536 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:38,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:38,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:38,537 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:38,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,738 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 11:42:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:38,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368906255] [2020-10-16 11:42:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,894 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 11:42:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368906255] [2020-10-16 11:42:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757138357] [2020-10-16 11:42:38,895 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 11:42:38,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:38,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:38,979 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 11:42:38,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:38,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26688627] [2020-10-16 11:42:38,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:38,981 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:39,444 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 11:42:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:39,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:39,446 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:39,446 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:39,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 11:42:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:39,450 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:39,451 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:39,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:39,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:39,452 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:39,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:39,662 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 11:42:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:39,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71003743] [2020-10-16 11:42:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:39,798 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 11:42:39,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71003743] [2020-10-16 11:42:39,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347235740] [2020-10-16 11:42:39,801 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 11:42:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:39,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:39,871 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 11:42:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:39,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780991870] [2020-10-16 11:42:39,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:39,873 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:40,282 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 11:42:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:40,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:40,284 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:40,284 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:40,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 11:42:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:40,288 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:40,288 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:40,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:40,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:40,289 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 11:42:40,498 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 11:42:40,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73730674] [2020-10-16 11:42:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73730674] [2020-10-16 11:42:40,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526965766] [2020-10-16 11:42:40,646 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 11:42:40,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:40,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:40,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:40,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:40,725 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 11:42:40,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:40,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45247521] [2020-10-16 11:42:40,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:40,727 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:41,247 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 11:42:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:41,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:41,249 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:41,249 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:41,250 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 11:42:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 11:42:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:41,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:41,251 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:41,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:41,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:41,252 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:41,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,453 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 11:42:41,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:41,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182410765] [2020-10-16 11:42:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:41,587 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 11:42:41,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182410765] [2020-10-16 11:42:41,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087706519] [2020-10-16 11:42:41,588 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 11:42:41,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:41,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:41,650 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 11:42:41,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:41,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860094930] [2020-10-16 11:42:41,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:41,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:41,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:41,651 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:42,100 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 11:42:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:42,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:42,102 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:42,102 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:42,102 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 11:42:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 11:42:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:42,105 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:42,105 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:42,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:42,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:42,106 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:42,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 11:42:42,307 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 11:42:42,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:42,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361792837] [2020-10-16 11:42:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:42,434 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 11:42:42,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361792837] [2020-10-16 11:42:42,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467987688] [2020-10-16 11:42:42,435 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 11:42:42,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:42,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:42,510 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 11:42:42,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:42,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063811469] [2020-10-16 11:42:42,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:42,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:42,512 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:43,116 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:43,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:43,118 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:43,118 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:43,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 11:42:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:43,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:43,121 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:43,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:43,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:43,122 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:43,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:43,331 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 11:42:43,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:43,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808370173] [2020-10-16 11:42:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:43,508 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 11:42:43,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808370173] [2020-10-16 11:42:43,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007049762] [2020-10-16 11:42:43,509 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 11:42:43,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:43,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:43,605 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 11:42:43,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:43,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349866880] [2020-10-16 11:42:43,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:43,607 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:44,236 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 11:42:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:44,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:44,238 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:44,238 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:44,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 11:42:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:44,240 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:44,241 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:44,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:44,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:44,242 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:44,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:44,449 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 11:42:44,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:44,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258202329] [2020-10-16 11:42:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,627 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 11:42:44,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258202329] [2020-10-16 11:42:44,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310139416] [2020-10-16 11:42:44,628 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 11:42:44,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:44,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:44,747 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 11:42:44,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:44,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30407868] [2020-10-16 11:42:44,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:44,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:44,749 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:45,470 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 11:42:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:45,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:45,472 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:45,472 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:45,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 11:42:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:45,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:45,475 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:45,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:45,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:45,475 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:45,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,684 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 11:42:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:45,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186419189] [2020-10-16 11:42:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:45,810 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 11:42:45,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186419189] [2020-10-16 11:42:45,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389091122] [2020-10-16 11:42:45,811 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 11:42:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:45,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:45,878 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 11:42:45,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:45,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:45,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336422744] [2020-10-16 11:42:45,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:45,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:45,879 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:46,426 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:42:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:46,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:46,428 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:46,428 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:46,428 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 11:42:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 11:42:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:42:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 11:42:46,431 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 11:42:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:46,431 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 11:42:46,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 11:42:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:46,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:46,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:46,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:46,641 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 11:42:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:46,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326822142] [2020-10-16 11:42:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,765 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 11:42:46,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326822142] [2020-10-16 11:42:46,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815643294] [2020-10-16 11:42:46,766 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 11:42:46,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:46,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:46,852 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 11:42:46,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:46,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:46,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486188263] [2020-10-16 11:42:46,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:46,854 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 11:42:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:47,586 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-16 11:42:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:42:47,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:47,588 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:47,588 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:47,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-16 11:42:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:42:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 11:42:47,590 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 11:42:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:47,590 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 11:42:47,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 11:42:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:47,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:47,591 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:47,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:47,799 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 11:42:47,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:47,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416932705] [2020-10-16 11:42:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:47,924 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 11:42:47,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416932705] [2020-10-16 11:42:47,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190035330] [2020-10-16 11:42:47,925 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 11:42:47,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:47,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:48,007 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 11:42:48,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:48,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:48,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120352117] [2020-10-16 11:42:48,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:48,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:48,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:48,008 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 11:42:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:48,682 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:42:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:48,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:48,683 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:48,683 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:48,684 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 11:42:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 11:42:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:48,687 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 11:42:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:48,687 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:48,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:48,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:48,688 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:48,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:48,888 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 11:42:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:48,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884313542] [2020-10-16 11:42:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:49,019 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 11:42:49,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884313542] [2020-10-16 11:42:49,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401538044] [2020-10-16 11:42:49,020 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 11:42:49,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:49,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:49,103 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 11:42:49,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:49,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:49,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829870669] [2020-10-16 11:42:49,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:49,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:49,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:49,105 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 11:42:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:49,845 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 11:42:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:49,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:49,846 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:49,847 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:49,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 11:42:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 11:42:49,850 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 11:42:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:49,850 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 11:42:49,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 11:42:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:49,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:49,851 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 11:42:50,060 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 11:42:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284103870] [2020-10-16 11:42:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:50,242 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 11:42:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284103870] [2020-10-16 11:42:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3378699] [2020-10-16 11:42:50,243 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 11:42:50,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:50,299 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 11:42:50,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:50,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:50,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160549487] [2020-10-16 11:42:50,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:50,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:50,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:50,301 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 11:42:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:50,620 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:50,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:50,623 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:50,623 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:50,624 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 11:42:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 11:42:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 11:42:50,626 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 11:42:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 11:42:50,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 11:42:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:50,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:50,627 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:50,830 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 11:42:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197008889] [2020-10-16 11:42:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,021 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 11:42:51,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197008889] [2020-10-16 11:42:51,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236890286] [2020-10-16 11:42:51,022 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 11:42:51,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:51,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:51,116 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 11:42:51,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:51,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265899190] [2020-10-16 11:42:51,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:51,118 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 11:42:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:51,484 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 11:42:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:51,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:51,485 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:51,486 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:51,486 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 11:42:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 11:42:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 11:42:51,489 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 11:42:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:51,489 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 11:42:51,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 11:42:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:51,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:51,490 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:51,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 11:42:51,694 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:51,694 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 11:42:51,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:51,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172740532] [2020-10-16 11:42:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,875 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 11:42:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172740532] [2020-10-16 11:42:51,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303545273] [2020-10-16 11:42:51,876 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 11:42:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:51,938 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 11:42:51,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:51,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746127636] [2020-10-16 11:42:51,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:51,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:51,939 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 11:42:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:52,378 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:52,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:52,380 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:52,380 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:52,381 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 11:42:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 11:42:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 11:42:52,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 11:42:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:52,385 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 11:42:52,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 11:42:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:52,386 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:52,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:52,597 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 11:42:52,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:52,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459521676] [2020-10-16 11:42:52,599 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 11:42:52,812 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 11:42:52,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459521676] [2020-10-16 11:42:52,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199820101] [2020-10-16 11:42:52,813 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 11:42:52,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:52,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:52,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:52,888 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 11:42:52,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:52,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14321777] [2020-10-16 11:42:52,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:52,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:52,890 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 11:42:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:53,313 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 11:42:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:53,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:53,315 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:53,315 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:53,315 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 11:42:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 11:42:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 11:42:53,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 11:42:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:53,318 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 11:42:53,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 11:42:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:53,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:53,319 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:53,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,527 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:53,527 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 11:42:53,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:53,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471030964] [2020-10-16 11:42:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:53,698 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 11:42:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471030964] [2020-10-16 11:42:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000429969] [2020-10-16 11:42:53,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:53,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:53,770 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 11:42:53,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:53,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134540443] [2020-10-16 11:42:53,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:53,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:53,771 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 11:42:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:54,196 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 11:42:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:54,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:54,198 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:54,198 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:54,199 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 11:42:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 11:42:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 11:42:54,201 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 11:42:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:54,201 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 11:42:54,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 11:42:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:54,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:54,202 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:54,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:42:54,410 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 11:42:54,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:54,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019934878] [2020-10-16 11:42:54,411 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 11:42:54,588 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 11:42:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019934878] [2020-10-16 11:42:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403057120] [2020-10-16 11:42:54,589 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 11:42:54,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:54,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:54,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:54,670 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 11:42:54,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:54,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190042267] [2020-10-16 11:42:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:54,671 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 11:42:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:55,190 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 11:42:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:55,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:55,192 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:42:55,192 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:42:55,192 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 11:42:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:42:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:42:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 11:42:55,195 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 11:42:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:55,195 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 11:42:55,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 11:42:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:55,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:55,195 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:55,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:42:55,396 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 11:42:55,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:55,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231875330] [2020-10-16 11:42:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:55,555 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 11:42:55,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231875330] [2020-10-16 11:42:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330122598] [2020-10-16 11:42:55,556 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 11:42:55,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:55,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:55,617 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 11:42:55,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:55,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283412887] [2020-10-16 11:42:55,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:55,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:55,619 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 11:42:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:56,092 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 11:42:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:56,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:56,094 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:42:56,094 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:42:56,095 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 11:42:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:42:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:42:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 11:42:56,097 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 11:42:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:56,097 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 11:42:56,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 11:42:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:56,098 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:56,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:56,305 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 11:42:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:56,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504141998] [2020-10-16 11:42:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:56,466 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 11:42:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504141998] [2020-10-16 11:42:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933866291] [2020-10-16 11:42:56,467 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 11:42:56,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:56,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:56,551 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 11:42:56,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:56,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199304134] [2020-10-16 11:42:56,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:56,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:56,552 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 11:42:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:57,154 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 11:42:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:57,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:57,156 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:57,156 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:57,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 11:42:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 11:42:57,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 11:42:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:57,160 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 11:42:57,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 11:42:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:57,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:57,160 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:57,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:42:57,369 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 11:42:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416875188] [2020-10-16 11:42:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,516 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 11:42:57,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416875188] [2020-10-16 11:42:57,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435058199] [2020-10-16 11:42:57,517 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 11:42:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:57,579 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 11:42:57,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:57,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:57,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796054397] [2020-10-16 11:42:57,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:57,580 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 11:42:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:58,116 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 11:42:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:58,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:58,117 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:42:58,118 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:42:58,118 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 11:42:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:42:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 11:42:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:58,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 11:42:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:58,122 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:58,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:58,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:58,122 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:58,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,327 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 11:42:58,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:58,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096724540] [2020-10-16 11:42:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:58,474 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 11:42:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096724540] [2020-10-16 11:42:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271381833] [2020-10-16 11:42:58,475 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 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 11:42:58,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:58,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:58,552 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 11:42:58,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:58,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:58,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975884172] [2020-10-16 11:42:58,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:58,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:58,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:58,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:58,553 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 11:42:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:59,219 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 11:42:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:59,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:59,221 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:42:59,221 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:42:59,222 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 11:42:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:42:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 11:42:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:59,223 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 11:42:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:59,223 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:59,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:59,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:59,224 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:59,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 11:42:59,425 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 11:42:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877163948] [2020-10-16 11:42:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:59,432 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 [1877163948] [2020-10-16 11:42:59,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550984210] [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 11:42:59,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:59,640 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 11:42:59,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:59,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:59,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915393303] [2020-10-16 11:42:59,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:59,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:59,642 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 11:43:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:00,237 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 11:43:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:00,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:43:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:00,238 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:43:00,239 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:43:00,239 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 11:43:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:43:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 11:43:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 11:43:00,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 11:43:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:00,242 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 11:43:00,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:43:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 11:43:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:00,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:00,243 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:00,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,446 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 11:43:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:00,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649492635] [2020-10-16 11:43:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:00,594 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 11:43:00,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649492635] [2020-10-16 11:43:00,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698528474] [2020-10-16 11:43:00,595 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 11:43:00,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:43:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:00,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:00,675 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 11:43:00,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:00,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:43:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785978947] [2020-10-16 11:43:00,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:00,677 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 11:43:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:01,423 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 11:43:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:01,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:43:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:01,424 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:01,425 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:43:01,425 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 11:43:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:43:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 11:43:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:43:01,428 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 11:43:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:01,428 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:43:01,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:43:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:01,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:01,429 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:01,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:43:01,637 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 11:43:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:01,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145343403] [2020-10-16 11:43:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:01,772 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 11:43:01,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145343403] [2020-10-16 11:43:01,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533665722] [2020-10-16 11:43:01,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:43:01,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:43:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:01,839 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 11:43:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:43:01,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127259110] [2020-10-16 11:43:01,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:43:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:43:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:43:01,841 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 11:43:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:02,487 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:43:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:02,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:43:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:02,488 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:43:02,489 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:43:02,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:43:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 11:43:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 11:43:02,492 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 11:43:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:02,492 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 11:43:02,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:43:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 11:43:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:02,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:02,493 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:02,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:43:02,702 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 11:43:02,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:02,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173281749] [2020-10-16 11:43:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:02,858 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 11:43:02,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173281749] [2020-10-16 11:43:02,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144489707] [2020-10-16 11:43:02,859 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 11:43:02,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:43:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:02,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:02,987 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 11:43:02,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:02,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:43:02,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168256883] [2020-10-16 11:43:02,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:02,988 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 11:43:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:03,779 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 11:43:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:03,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:43:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:03,780 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:03,780 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:43:03,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:43:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 11:43:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 11:43:03,783 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 11:43:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:03,783 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 11:43:03,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 11:43:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:03,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:03,783 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:03,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:03,984 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 11:43:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:03,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109251751] [2020-10-16 11:43:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,196 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 11:43:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109251751] [2020-10-16 11:43:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30838286] [2020-10-16 11:43:04,197 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 11:43:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:04,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:04,253 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 11:43:04,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:04,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:04,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936842362] [2020-10-16 11:43:04,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:04,255 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 11:43:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:04,631 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 11:43:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:04,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:04,633 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:04,633 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:04,633 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 11:43:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 11:43:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:04,635 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:04,635 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:04,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:04,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:04,636 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:04,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,841 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 11:43:04,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:04,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435719108] [2020-10-16 11:43:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:05,057 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 11:43:05,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435719108] [2020-10-16 11:43:05,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807308913] [2020-10-16 11:43:05,058 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 11:43:05,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:05,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:05,134 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 11:43:05,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547431626] [2020-10-16 11:43:05,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:05,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:05,136 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:05,600 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 11:43:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:05,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:05,602 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:05,602 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:05,603 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 11:43:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 11:43:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:05,605 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:05,605 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:05,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:05,607 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:05,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:43:05,815 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 11:43:05,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:05,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850135979] [2020-10-16 11:43:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:06,012 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 11:43:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850135979] [2020-10-16 11:43:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285499424] [2020-10-16 11:43:06,013 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 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 11:43:06,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:06,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:06,081 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 11:43:06,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:06,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:06,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873897584] [2020-10-16 11:43:06,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:06,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:06,083 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:06,505 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:43:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:06,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:06,507 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:06,507 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:06,507 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 11:43:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 11:43:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:06,510 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:06,510 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:06,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:06,511 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:06,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:06,712 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 11:43:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:06,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908821330] [2020-10-16 11:43:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908821330] [2020-10-16 11:43:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699313100] [2020-10-16 11:43:06,911 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 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 11:43:06,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:06,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:06,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:06,991 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 11:43:06,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:06,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:06,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045839603] [2020-10-16 11:43:06,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:06,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:06,993 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:07,542 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 11:43:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:07,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:07,543 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:07,543 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:07,543 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 11:43:07,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 11:43:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:07,545 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:07,545 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:07,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:07,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:07,546 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:07,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 11:43:07,755 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 11:43:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:07,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224985635] [2020-10-16 11:43:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:07,926 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 11:43:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224985635] [2020-10-16 11:43:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029056438] [2020-10-16 11:43:07,927 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 11:43:07,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:07,997 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 11:43:07,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:07,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764192571] [2020-10-16 11:43:07,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:07,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:07,999 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:08,479 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:43:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:08,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:08,480 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:43:08,481 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:43:08,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:43:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 11:43:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:08,486 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:08,486 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:08,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:08,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:08,487 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:08,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:43:08,696 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 11:43:08,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:08,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048200574] [2020-10-16 11:43:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:08,867 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 11:43:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048200574] [2020-10-16 11:43:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277879533] [2020-10-16 11:43:08,867 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 11:43:08,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:08,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:08,950 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 11:43:08,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:08,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64604550] [2020-10-16 11:43:08,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:08,952 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:09,579 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 11:43:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:09,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:09,580 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:43:09,581 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:43:09,581 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 11:43:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:43:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 11:43:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:09,584 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:09,584 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:09,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:09,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:09,585 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:09,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 11:43:09,790 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 11:43:09,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:09,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885528976] [2020-10-16 11:43:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:09,968 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 11:43:09,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885528976] [2020-10-16 11:43:09,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473178354] [2020-10-16 11:43:09,969 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 11:43:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:10,035 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 11:43:10,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:10,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884836543] [2020-10-16 11:43:10,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:10,036 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:10,578 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 11:43:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:10,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:10,579 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:10,579 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:43:10,580 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 11:43:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:43:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 11:43:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:10,582 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:10,582 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:10,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:10,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:10,583 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:10,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:10,784 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 11:43:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:10,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044194907] [2020-10-16 11:43:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,960 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 11:43:10,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044194907] [2020-10-16 11:43:10,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557539047] [2020-10-16 11:43:10,961 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 11:43:11,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:11,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:11,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:11,047 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 11:43:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:11,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646350997] [2020-10-16 11:43:11,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:11,050 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:11,755 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:43:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:11,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:11,756 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:43:11,757 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:43:11,757 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 11:43:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:43:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 11:43:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:11,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:11,762 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:11,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:11,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:11,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:11,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 11:43:11,971 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 11:43:11,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:11,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612478504] [2020-10-16 11:43:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:12,131 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 11:43:12,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612478504] [2020-10-16 11:43:12,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711113668] [2020-10-16 11:43:12,132 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 11:43:12,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:12,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:12,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:12,207 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 11:43:12,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:12,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292243687] [2020-10-16 11:43:12,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:12,208 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:12,810 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 11:43:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:12,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:12,811 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:12,812 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:12,812 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 11:43:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 11:43:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:12,815 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:12,815 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:12,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:12,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:12,815 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:13,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:13,019 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 11:43:13,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:13,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317167110] [2020-10-16 11:43:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317167110] [2020-10-16 11:43:13,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403416524] [2020-10-16 11:43:13,191 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 11:43:13,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:13,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:13,290 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 11:43:13,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:13,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786230957] [2020-10-16 11:43:13,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:13,291 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:14,089 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:43:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:14,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:14,091 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:43:14,091 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:43:14,091 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 11:43:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:43:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 11:43:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:14,093 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:14,094 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:14,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:14,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:14,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:14,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:14,295 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 11:43:14,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:14,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916728512] [2020-10-16 11:43:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:14,460 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 11:43:14,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916728512] [2020-10-16 11:43:14,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223372884] [2020-10-16 11:43:14,461 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 11:43:14,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:14,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:14,543 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 11:43:14,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:14,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:14,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741543627] [2020-10-16 11:43:14,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:14,545 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:15,199 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:43:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:15,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:15,200 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:43:15,201 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:15,201 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 11:43:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 11:43:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:15,203 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:15,203 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:15,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:15,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:15,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:15,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:15,411 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 11:43:15,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:15,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791011382] [2020-10-16 11:43:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:15,584 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 11:43:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791011382] [2020-10-16 11:43:15,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85410179] [2020-10-16 11:43:15,585 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 11:43:15,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:15,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:15,740 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 11:43:15,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:15,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505641550] [2020-10-16 11:43:15,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:15,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:15,742 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:16,684 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 11:43:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:16,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:16,685 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:43:16,685 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:16,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 11:43:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:16,688 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:16,688 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:16,689 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:16,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:16,889 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 11:43:16,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:16,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788123372] [2020-10-16 11:43:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,047 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 11:43:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788123372] [2020-10-16 11:43:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909739284] [2020-10-16 11:43:17,048 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 11:43:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:17,114 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 11:43:17,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:17,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:17,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887805717] [2020-10-16 11:43:17,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:17,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:17,116 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:17,859 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:43:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:17,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:17,860 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:17,860 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:17,860 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 11:43:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 11:43:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:43:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 11:43:17,862 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 11:43:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:17,863 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 11:43:17,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 11:43:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:17,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:17,863 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:18,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:43:18,064 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 11:43:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:18,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116660730] [2020-10-16 11:43:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:18,219 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 11:43:18,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116660730] [2020-10-16 11:43:18,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859835485] [2020-10-16 11:43:18,220 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 11:43:18,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:18,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048898216] [2020-10-16 11:43:18,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:18,308 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 11:43:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:19,136 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-10-16 11:43:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:19,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:19,137 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:43:19,138 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:43:19,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:43:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:43:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:43:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 11:43:19,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 11:43:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:19,141 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 11:43:19,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 11:43:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:19,141 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:19,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 11:43:19,350 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 11:43:19,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:19,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322297852] [2020-10-16 11:43:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:19,491 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 11:43:19,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322297852] [2020-10-16 11:43:19,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694223553] [2020-10-16 11:43:19,492 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 11:43:19,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:19,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:19,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:19,582 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 11:43:19,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:19,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:19,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090741404] [2020-10-16 11:43:19,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:19,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:19,584 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 11:43:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:20,442 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 11:43:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:20,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:20,443 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:20,443 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:20,444 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 11:43:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 11:43:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:20,446 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 11:43:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:20,446 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:20,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:20,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:20,446 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:20,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:43:20,647 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 11:43:20,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:20,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102996531] [2020-10-16 11:43:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:20,808 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 11:43:20,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102996531] [2020-10-16 11:43:20,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583248262] [2020-10-16 11:43:20,809 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 11:43:20,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:20,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:20,901 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 11:43:20,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:20,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:20,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212925839] [2020-10-16 11:43:20,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:20,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:20,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:20,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:20,903 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 11:43:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:21,845 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 11:43:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:21,845 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:21,846 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:43:21,846 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:43:21,846 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 11:43:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:43:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 11:43:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:43:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 11:43:21,848 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 11:43:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 11:43:21,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 11:43:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:21,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:21,849 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:22,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:43:22,054 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 11:43:22,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:22,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414531898] [2020-10-16 11:43:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:22,282 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 11:43:22,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414531898] [2020-10-16 11:43:22,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553119641] [2020-10-16 11:43:22,282 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 11:43:22,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:22,341 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 11:43:22,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:22,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33417069] [2020-10-16 11:43:22,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:22,343 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 11:43:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:22,695 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 11:43:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:22,696 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:22,696 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:22,696 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:43:22,697 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 11:43:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:43:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 11:43:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 11:43:22,698 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 11:43:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:22,699 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 11:43:22,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 11:43:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:22,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:22,699 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:22,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:22,908 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:22,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 11:43:22,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:22,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608800947] [2020-10-16 11:43:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:23,150 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 11:43:23,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608800947] [2020-10-16 11:43:23,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204041419] [2020-10-16 11:43:23,151 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 11:43:23,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:23,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:23,236 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 11:43:23,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:23,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:23,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915663996] [2020-10-16 11:43:23,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:23,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:23,238 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 11:43:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:23,676 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 11:43:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:23,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:23,677 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:23,678 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:23,678 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 11:43:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:43:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:43:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 11:43:23,681 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 11:43:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:23,681 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 11:43:23,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 11:43:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:23,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:23,681 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:23,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 11:43:23,882 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 11:43:23,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:23,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858296875] [2020-10-16 11:43:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,114 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 11:43:24,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858296875] [2020-10-16 11:43:24,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770748738] [2020-10-16 11:43:24,114 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 11:43:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:24,174 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 11:43:24,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:24,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:24,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936862962] [2020-10-16 11:43:24,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:24,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:24,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:24,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:24,176 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 11:43:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:24,675 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 11:43:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:24,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:24,676 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:24,676 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:24,677 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 11:43:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:43:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:43:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 11:43:24,678 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 11:43:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:24,679 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 11:43:24,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 11:43:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:24,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:24,679 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:24,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:43:24,886 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 11:43:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:24,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035542982] [2020-10-16 11:43:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:25,120 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 11:43:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035542982] [2020-10-16 11:43:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264006319] [2020-10-16 11:43:25,121 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 11:43:25,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:25,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:25,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:25,204 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 11:43:25,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:25,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:25,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132436848] [2020-10-16 11:43:25,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:25,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:25,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:25,206 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 11:43:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:25,739 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 11:43:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:25,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:25,741 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:25,741 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:25,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 11:43:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 11:43:25,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 11:43:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:25,744 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 11:43:25,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 11:43:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:25,745 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:25,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 11:43:25,946 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 11:43:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521898560] [2020-10-16 11:43:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:26,159 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 11:43:26,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521898560] [2020-10-16 11:43:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111406963] [2020-10-16 11:43:26,160 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 11:43:26,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:26,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:26,224 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 11:43:26,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:26,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:26,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451438506] [2020-10-16 11:43:26,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:26,226 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 11:43:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:26,767 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 11:43:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:26,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:26,768 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:26,768 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:26,769 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 11:43:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 11:43:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:43:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 11:43:26,771 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 11:43:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:26,772 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 11:43:26,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 11:43:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:26,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:26,772 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:26,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:26,977 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 11:43:26,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:26,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152842409] [2020-10-16 11:43:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:27,192 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 11:43:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152842409] [2020-10-16 11:43:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834755540] [2020-10-16 11:43:27,193 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 11:43:27,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:27,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:27,276 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 11:43:27,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:27,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770985297] [2020-10-16 11:43:27,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:27,277 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 11:43:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:27,901 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 11:43:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:27,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:27,902 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:43:27,902 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:43:27,903 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 11:43:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:43:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 11:43:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:43:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 11:43:27,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 11:43:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:27,905 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 11:43:27,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 11:43:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:27,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:27,906 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:28,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:28,107 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 11:43:28,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:28,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584072298] [2020-10-16 11:43:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584072298] [2020-10-16 11:43:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764170156] [2020-10-16 11:43:28,309 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 11:43:28,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:28,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:28,376 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 11:43:28,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122989454] [2020-10-16 11:43:28,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:28,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:28,377 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 11:43:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:28,971 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 11:43:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:28,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:28,972 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:28,972 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:28,973 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 11:43:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 11:43:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 11:43:28,975 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 11:43:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:28,975 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 11:43:28,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 11:43:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:28,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:28,976 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:29,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:29,177 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 11:43:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:29,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695038405] [2020-10-16 11:43:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:29,390 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 11:43:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695038405] [2020-10-16 11:43:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329595499] [2020-10-16 11:43:29,391 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 11:43:29,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:29,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:29,532 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 11:43:29,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:29,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197342932] [2020-10-16 11:43:29,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:29,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:29,534 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 11:43:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:30,210 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 11:43:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:30,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:30,211 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:30,212 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:30,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 11:43:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 11:43:30,214 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 11:43:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:30,214 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 11:43:30,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 11:43:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:30,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:30,215 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:30,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:43:30,422 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 11:43:30,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:30,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459330274] [2020-10-16 11:43:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,618 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 11:43:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459330274] [2020-10-16 11:43:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367598962] [2020-10-16 11:43:30,619 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 11:43:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:30,694 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 11:43:30,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:30,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660480344] [2020-10-16 11:43:30,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:30,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:30,695 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 11:43:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:31,348 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 11:43:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:31,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:31,349 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:43:31,350 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:43:31,350 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 11:43:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:43:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 11:43:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 11:43:31,353 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 11:43:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:31,354 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 11:43:31,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 11:43:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:31,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:31,354 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:31,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:31,560 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 11:43:31,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:31,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054171582] [2020-10-16 11:43:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,756 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 11:43:31,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054171582] [2020-10-16 11:43:31,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215870965] [2020-10-16 11:43:31,757 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 11:43:31,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:31,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:31,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:31,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:31,840 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 11:43:31,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:31,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:31,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388725149] [2020-10-16 11:43:31,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:31,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:31,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:31,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:31,841 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 11:43:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:32,631 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 11:43:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:32,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:32,632 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:43:32,632 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:43:32,632 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 11:43:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:43:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 11:43:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:43:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 11:43:32,633 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 11:43:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:32,634 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 11:43:32,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 11:43:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:32,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:32,634 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:32,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:43:32,835 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 11:43:32,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:32,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771812275] [2020-10-16 11:43:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:33,025 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 11:43:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771812275] [2020-10-16 11:43:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018486215] [2020-10-16 11:43:33,025 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 11:43:33,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:33,095 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 11:43:33,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:33,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:33,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275903896] [2020-10-16 11:43:33,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:33,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:33,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:33,097 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 11:43:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:33,800 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 11:43:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:33,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:33,801 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:33,801 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:33,802 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 11:43:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 11:43:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:33,803 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 11:43:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:33,803 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:33,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:33,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:33,804 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:34,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:43:34,005 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 11:43:34,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:34,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127787432] [2020-10-16 11:43:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:34,197 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 11:43:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127787432] [2020-10-16 11:43:34,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44180808] [2020-10-16 11:43:34,198 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 11:43:34,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:34,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:34,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:34,292 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 11:43:34,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:34,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524536393] [2020-10-16 11:43:34,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:34,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:34,293 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 11:43:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:35,167 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 11:43:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:35,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:35,172 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:35,172 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:35,173 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 11:43:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 11:43:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:35,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 11:43:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:35,174 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:35,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:35,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:35,175 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:35,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 11:43:35,376 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 11:43:35,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:35,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323400328] [2020-10-16 11:43:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:35,562 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 11:43:35,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323400328] [2020-10-16 11:43:35,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105357522] [2020-10-16 11:43:35,563 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 11:43:35,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:35,638 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 11:43:35,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:35,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:35,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691906216] [2020-10-16 11:43:35,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:35,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:35,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:35,639 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 11:43:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:36,465 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 11:43:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:36,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:36,466 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:36,466 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:36,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 11:43:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:43:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 11:43:36,469 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 11:43:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:36,469 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 11:43:36,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 11:43:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:36,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:36,470 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:36,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,670 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 11:43:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:36,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332887469] [2020-10-16 11:43:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:36,858 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 11:43:36,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332887469] [2020-10-16 11:43:36,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522202786] [2020-10-16 11:43:36,859 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 11:43:36,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:36,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:36,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:36,948 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 11:43:36,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:36,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464072804] [2020-10-16 11:43:36,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:36,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:36,950 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 11:43:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:37,905 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 11:43:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:37,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:37,906 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:37,906 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:37,907 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 11:43:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 11:43:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:37,908 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 11:43:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:37,908 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:37,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:37,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:37,909 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:38,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:43:38,110 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 11:43:38,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:38,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644563118] [2020-10-16 11:43:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,293 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 11:43:38,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644563118] [2020-10-16 11:43:38,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355929873] [2020-10-16 11:43:38,294 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 11:43:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:38,362 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 11:43:38,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:38,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:38,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075932013] [2020-10-16 11:43:38,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:38,364 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 11:43:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:39,172 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 11:43:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:39,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:39,175 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:43:39,175 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:43:39,176 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 11:43:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:43:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 11:43:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 11:43:39,178 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 11:43:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:39,178 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 11:43:39,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 11:43:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:39,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:39,179 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:39,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:39,387 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 11:43:39,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:39,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267903284] [2020-10-16 11:43:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:39,571 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 11:43:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267903284] [2020-10-16 11:43:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180220431] [2020-10-16 11:43:39,572 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 11:43:39,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:39,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:39,656 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 11:43:39,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:39,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:39,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278150183] [2020-10-16 11:43:39,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:39,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:39,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:39,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:39,658 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 11:43:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:40,650 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 11:43:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:40,651 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:40,651 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:40,651 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:40,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 11:43:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:43:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 11:43:40,654 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 11:43:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:40,654 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 11:43:40,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 11:43:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:40,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:40,655 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:40,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:40,856 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 11:43:40,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:40,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323339055] [2020-10-16 11:43:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:41,119 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 11:43:41,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323339055] [2020-10-16 11:43:41,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633494570] [2020-10-16 11:43:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:43:41,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:41,184 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 11:43:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707719683] [2020-10-16 11:43:41,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:41,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:41,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:41,186 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 11:43:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:41,657 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 11:43:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:41,658 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:41,658 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:43:41,659 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:43:41,659 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 11:43:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:43:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 11:43:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:41,661 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:41,661 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:41,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:41,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:41,662 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:41,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:41,864 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 11:43:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:41,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41455023] [2020-10-16 11:43:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:42,139 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 11:43:42,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41455023] [2020-10-16 11:43:42,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723313963] [2020-10-16 11:43:42,140 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 11:43:42,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:42,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:42,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:42,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:42,228 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 11:43:42,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:42,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320715164] [2020-10-16 11:43:42,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:42,230 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:42,779 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:43:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:42,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:42,781 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:43:42,781 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:43:42,781 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 11:43:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:43:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 11:43:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:42,783 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:42,784 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:42,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:42,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:42,784 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:42,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:42,985 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 11:43:42,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:42,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917653871] [2020-10-16 11:43:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:43,236 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 11:43:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917653871] [2020-10-16 11:43:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819486356] [2020-10-16 11:43:43,237 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 11:43:43,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:43,299 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 11:43:43,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:43,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558667220] [2020-10-16 11:43:43,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:43,301 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:43,817 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:43:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:43,818 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:43,819 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:43:43,819 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:43:43,819 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 11:43:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:43:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 11:43:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:43,822 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:43,822 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:43,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:43,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:43,822 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:44,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:44,023 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 11:43:44,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:44,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364989183] [2020-10-16 11:43:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:44,284 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 11:43:44,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364989183] [2020-10-16 11:43:44,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576608635] [2020-10-16 11:43:44,285 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 11:43:44,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:44,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:44,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:44,372 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 11:43:44,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:44,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:44,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232706323] [2020-10-16 11:43:44,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:44,373 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:45,028 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 11:43:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:45,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:45,029 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:45,030 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:45,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 11:43:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:45,032 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:45,032 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:45,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:45,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:45,033 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:45,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:43:45,234 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 11:43:45,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:45,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844346646] [2020-10-16 11:43:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,464 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 11:43:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844346646] [2020-10-16 11:43:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456104420] [2020-10-16 11:43:45,465 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 11:43:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:45,533 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 11:43:45,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:45,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877749510] [2020-10-16 11:43:45,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:45,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:45,534 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:46,128 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 11:43:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:46,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:46,128 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:46,129 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:46,129 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 11:43:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 11:43:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:46,131 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:46,131 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:46,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:46,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:46,132 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:43:46,335 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 11:43:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:46,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525716027] [2020-10-16 11:43:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:46,582 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 11:43:46,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525716027] [2020-10-16 11:43:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153834298] [2020-10-16 11:43:46,583 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 11:43:46,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:46,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:46,707 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 11:43:46,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:46,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:46,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916780687] [2020-10-16 11:43:46,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:46,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:46,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:46,709 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:47,532 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 11:43:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:47,532 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:47,533 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:47,533 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:47,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 11:43:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:47,536 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:47,536 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:47,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:47,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:47,537 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:47,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:43:47,738 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:47,739 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 11:43:47,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:47,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097044875] [2020-10-16 11:43:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:47,975 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 11:43:47,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097044875] [2020-10-16 11:43:47,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229236767] [2020-10-16 11:43:47,976 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 11:43:48,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:48,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:48,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:48,044 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 11:43:48,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:48,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275643697] [2020-10-16 11:43:48,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:48,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:48,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:48,045 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:48,697 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 11:43:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:48,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:48,698 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:48,699 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:48,699 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 11:43:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 11:43:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:48,706 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:48,706 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:48,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:48,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:48,707 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:48,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:43:48,908 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 11:43:48,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:48,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162970974] [2020-10-16 11:43:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:49,141 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 11:43:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162970974] [2020-10-16 11:43:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168153676] [2020-10-16 11:43:49,142 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 11:43:49,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:49,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:49,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:49,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:49,231 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 11:43:49,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:49,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:49,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795867135] [2020-10-16 11:43:49,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:49,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:49,233 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:50,069 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 11:43:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:50,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:50,070 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:50,071 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:50,071 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 11:43:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 11:43:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:50,073 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:50,074 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:50,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:50,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:50,074 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:50,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,275 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:50,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 11:43:50,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517605263] [2020-10-16 11:43:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:50,497 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 11:43:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517605263] [2020-10-16 11:43:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861352844] [2020-10-16 11:43:50,497 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 11:43:50,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:50,566 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 11:43:50,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:50,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:50,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520659017] [2020-10-16 11:43:50,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:50,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:50,567 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:51,279 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 11:43:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:51,280 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:51,281 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:51,281 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:51,281 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 11:43:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 11:43:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:51,284 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:51,284 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:51,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:51,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:51,285 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:51,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 11:43:51,485 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 11:43:51,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:51,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556189163] [2020-10-16 11:43:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:51,705 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 11:43:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556189163] [2020-10-16 11:43:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176256335] [2020-10-16 11:43:51,705 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 11:43:51,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:51,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:51,801 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 11:43:51,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:51,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:51,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689393262] [2020-10-16 11:43:51,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:51,802 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:52,749 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 11:43:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:52,750 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:52,751 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:43:52,751 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:43:52,751 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 11:43:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:43:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 11:43:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:52,753 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:52,754 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:52,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:52,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:52,754 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:52,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:52,955 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 11:43:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:52,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486732260] [2020-10-16 11:43:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:53,168 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 11:43:53,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486732260] [2020-10-16 11:43:53,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147331874] [2020-10-16 11:43:53,169 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 11:43:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:53,234 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 11:43:53,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:53,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146465010] [2020-10-16 11:43:53,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:53,236 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:54,032 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 11:43:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:54,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:54,033 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:43:54,033 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:43:54,034 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 11:43:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:43:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 11:43:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:54,035 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:54,036 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:54,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:54,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:54,036 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:54,237 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 11:43:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:54,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525448283] [2020-10-16 11:43:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:54,448 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 11:43:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525448283] [2020-10-16 11:43:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615794840] [2020-10-16 11:43:54,449 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 11:43:54,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:54,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:54,535 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 11:43:54,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:54,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545999006] [2020-10-16 11:43:54,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:54,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:54,537 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:55,573 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:43:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:55,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:55,574 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:55,575 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:55,575 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 11:43:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 11:43:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:55,577 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:55,578 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:55,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:55,578 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:55,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 11:43:55,780 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 11:43:55,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:55,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341421565] [2020-10-16 11:43:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341421565] [2020-10-16 11:43:55,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417733724] [2020-10-16 11:43:55,993 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 11:43:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:56,066 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 11:43:56,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:56,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:56,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515395147] [2020-10-16 11:43:56,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:56,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:56,067 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:56,911 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 11:43:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:56,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:56,912 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:43:56,912 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:43:56,913 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 11:43:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:43:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 11:43:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:56,915 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:56,915 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:56,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:56,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:56,916 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:57,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:57,116 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 11:43:57,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:57,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593477059] [2020-10-16 11:43:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:57,326 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 11:43:57,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593477059] [2020-10-16 11:43:57,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220199808] [2020-10-16 11:43:57,327 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 11:43:57,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:57,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:57,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:57,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:57,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:57,428 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 11:43:57,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:57,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:57,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99399558] [2020-10-16 11:43:57,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:57,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:57,430 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:58,563 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 11:43:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:58,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:58,565 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:43:58,565 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:43:58,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:43:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:43:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 11:43:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:58,567 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:58,567 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:58,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:58,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:58,568 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:58,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:43:58,769 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 11:43:58,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:58,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687557596] [2020-10-16 11:43:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:58,982 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 11:43:58,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687557596] [2020-10-16 11:43:58,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554125575] [2020-10-16 11:43:58,983 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 11:43:59,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:59,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:59,057 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 11:43:59,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:59,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:59,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938504329] [2020-10-16 11:43:59,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:59,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:59,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:59,059 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:59,980 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:43:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:59,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:59,981 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:59,982 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:59,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 11:43:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:43:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 11:43:59,985 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 11:43:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:59,986 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 11:43:59,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 11:43:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:59,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:59,986 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:00,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:44:00,187 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 11:44:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918322120] [2020-10-16 11:44:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:00,382 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 11:44:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918322120] [2020-10-16 11:44:00,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464999723] [2020-10-16 11:44:00,383 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 11:44:00,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:44:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:00,480 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 11:44:00,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:00,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:44:00,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758150706] [2020-10-16 11:44:00,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:00,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:00,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:00,482 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 11:44:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:01,519 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-10-16 11:44:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:01,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:44:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:01,521 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:44:01,521 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:44:01,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:44:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-16 11:44:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:44:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 11:44:01,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 11:44:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:01,523 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 11:44:01,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 11:44:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:44:01,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:01,524 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:01,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:44:01,724 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 11:44:01,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:01,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100553296] [2020-10-16 11:44:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,935 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 11:44:01,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100553296] [2020-10-16 11:44:01,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534951393] [2020-10-16 11:44:01,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:44:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:44:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:02,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:02,028 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 11:44:02,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:02,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:44:02,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096301129] [2020-10-16 11:44:02,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:02,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:02,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:02,030 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 11:44:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:03,112 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:03,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:44:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:03,113 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:03,113 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:44:03,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:44:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 11:44:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:03,116 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 11:44:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:03,116 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:03,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:03,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:03,117 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:03,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:44:03,318 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 11:44:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053014998] [2020-10-16 11:44:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:03,548 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 11:44:03,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053014998] [2020-10-16 11:44:03,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047511074] [2020-10-16 11:44:03,549 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 11:44:03,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:03,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:03,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:03,655 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 11:44:03,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:03,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62048999] [2020-10-16 11:44:03,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:03,657 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 11:44:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:04,842 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 11:44:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:04,843 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:04,843 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:44:04,843 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:44:04,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:44:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:44:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:44:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 11:44:04,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 11:44:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:04,845 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 11:44:04,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 11:44:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:04,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:04,846 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:05,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:05,047 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 11:44:05,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:05,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173265720] [2020-10-16 11:44:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:05,347 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 11:44:05,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173265720] [2020-10-16 11:44:05,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843834426] [2020-10-16 11:44:05,347 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 11:44:05,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:05,411 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 11:44:05,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:05,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:05,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966396074] [2020-10-16 11:44:05,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:05,412 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 11:44:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:05,871 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 11:44:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:44:05,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:05,872 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:44:05,872 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:44:05,873 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 11:44:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:44:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 11:44:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:44:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 11:44:05,875 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 11:44:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:05,875 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 11:44:05,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 11:44:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:05,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:05,876 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:06,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:06,077 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 11:44:06,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:06,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557311191] [2020-10-16 11:44:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:06,361 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 11:44:06,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557311191] [2020-10-16 11:44:06,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716636490] [2020-10-16 11:44:06,362 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 11:44:06,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:06,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:06,444 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 11:44:06,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:06,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:06,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125476955] [2020-10-16 11:44:06,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:06,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:06,446 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 11:44:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:06,990 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 11:44:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:44:06,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:06,992 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:44:06,992 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:44:06,992 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 11:44:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:44:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 11:44:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:44:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 11:44:06,994 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 11:44:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:06,995 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 11:44:06,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 11:44:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:06,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:06,995 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:07,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:07,196 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 11:44:07,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:07,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109384123] [2020-10-16 11:44:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:07,497 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 11:44:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109384123] [2020-10-16 11:44:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890856706] [2020-10-16 11:44:07,498 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 11:44:07,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:07,570 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 11:44:07,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:07,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:07,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646607323] [2020-10-16 11:44:07,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:07,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:07,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:07,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:07,572 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 11:44:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:08,150 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 11:44:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:08,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:08,151 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:08,151 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:08,151 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 11:44:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 11:44:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:44:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 11:44:08,153 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 11:44:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:08,154 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 11:44:08,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 11:44:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:08,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:08,154 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:08,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:08,355 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 11:44:08,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:08,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432042742] [2020-10-16 11:44:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:08,661 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 11:44:08,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432042742] [2020-10-16 11:44:08,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400518696] [2020-10-16 11:44:08,661 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 11:44:08,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:08,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:08,752 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 11:44:08,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:08,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:08,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399778512] [2020-10-16 11:44:08,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:08,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:08,753 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 11:44:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:09,394 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 11:44:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:09,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:09,395 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:09,395 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:09,395 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 11:44:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 11:44:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:44:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 11:44:09,398 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 11:44:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:09,398 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 11:44:09,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 11:44:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:09,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:09,399 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:09,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:09,600 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 11:44:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:09,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814559653] [2020-10-16 11:44:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:09,879 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 11:44:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814559653] [2020-10-16 11:44:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147298910] [2020-10-16 11:44:09,880 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 11:44:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:09,945 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 11:44:09,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:09,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:09,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132925991] [2020-10-16 11:44:09,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:09,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:09,946 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 11:44:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:10,576 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 11:44:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:10,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:10,578 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:10,578 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:10,579 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 11:44:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 11:44:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:44:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 11:44:10,581 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 11:44:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:10,581 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 11:44:10,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 11:44:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:10,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:10,581 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:10,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:10,782 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 11:44:10,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:10,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556550943] [2020-10-16 11:44:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:11,066 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 11:44:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556550943] [2020-10-16 11:44:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102977100] [2020-10-16 11:44:11,066 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 11:44:11,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:11,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:11,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:11,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:11,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:11,153 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 11:44:11,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140774655] [2020-10-16 11:44:11,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:11,154 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 11:44:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:11,863 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 11:44:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:11,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:11,864 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:44:11,864 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:44:11,864 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 11:44:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:44:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 11:44:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:44:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 11:44:11,867 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 11:44:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:11,867 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 11:44:11,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 11:44:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:11,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:11,868 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:12,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:12,071 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 11:44:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:12,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996970071] [2020-10-16 11:44:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:12,338 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 11:44:12,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996970071] [2020-10-16 11:44:12,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590064537] [2020-10-16 11:44:12,339 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 11:44:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:12,410 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 11:44:12,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:12,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:12,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285465295] [2020-10-16 11:44:12,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:12,411 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 11:44:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:13,134 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 11:44:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:13,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:13,135 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:13,135 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:13,136 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 11:44:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 11:44:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:44:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 11:44:13,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 11:44:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:13,138 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 11:44:13,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 11:44:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:13,138 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:13,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:44:13,339 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 11:44:13,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:13,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314691713] [2020-10-16 11:44:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:13,616 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 11:44:13,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314691713] [2020-10-16 11:44:13,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173989440] [2020-10-16 11:44:13,616 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 11:44:13,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:13,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:13,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:13,705 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 11:44:13,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:13,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:13,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685343155] [2020-10-16 11:44:13,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:13,706 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 11:44:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:14,532 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 11:44:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:14,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:14,533 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:14,533 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:14,533 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 11:44:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 11:44:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 11:44:14,536 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 11:44:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:14,536 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 11:44:14,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 11:44:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:14,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:14,537 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:14,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:44:14,737 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 11:44:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:14,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155755503] [2020-10-16 11:44:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:14,992 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 11:44:14,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155755503] [2020-10-16 11:44:14,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409029317] [2020-10-16 11:44:14,992 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 11:44:15,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:15,063 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 11:44:15,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:15,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:15,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752143722] [2020-10-16 11:44:15,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:15,064 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 11:44:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:15,845 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 11:44:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:15,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:15,846 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:44:15,846 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:44:15,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:44:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 11:44:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:44:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 11:44:15,848 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 11:44:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:15,849 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 11:44:15,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 11:44:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:15,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:15,849 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:16,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:44:16,050 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 11:44:16,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:16,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828308142] [2020-10-16 11:44:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:16,301 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 11:44:16,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828308142] [2020-10-16 11:44:16,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142794086] [2020-10-16 11:44:16,301 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 11:44:16,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:16,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:16,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:16,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:16,401 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 11:44:16,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:16,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448522402] [2020-10-16 11:44:16,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:16,402 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 11:44:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:17,313 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 11:44:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:17,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:17,314 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:17,314 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:17,314 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 11:44:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 11:44:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:44:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 11:44:17,317 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 11:44:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:17,326 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 11:44:17,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 11:44:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:17,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:17,327 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:17,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:44:17,528 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 11:44:17,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:17,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529826040] [2020-10-16 11:44:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,769 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 11:44:17,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529826040] [2020-10-16 11:44:17,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322630130] [2020-10-16 11:44:17,770 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 11:44:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:17,838 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 11:44:17,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:17,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:17,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476070515] [2020-10-16 11:44:17,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:17,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:17,839 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 11:44:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:18,668 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:44:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:18,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:18,669 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:18,670 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:18,670 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 11:44:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 11:44:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:44:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 11:44:18,672 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 11:44:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:18,673 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 11:44:18,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 11:44:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:18,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:18,673 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:18,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:18,874 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:18,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 11:44:18,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:18,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676100416] [2020-10-16 11:44:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:19,121 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 11:44:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676100416] [2020-10-16 11:44:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306168044] [2020-10-16 11:44:19,122 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 11:44:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:19,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:19,209 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 11:44:19,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:19,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:19,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525284809] [2020-10-16 11:44:19,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:19,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:19,210 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 11:44:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:20,228 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 11:44:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:20,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:20,229 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:20,229 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:20,229 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 11:44:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 11:44:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:44:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 11:44:20,231 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 11:44:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:20,231 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 11:44:20,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:20,232 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 11:44:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:20,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:20,232 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:20,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:20,433 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 11:44:20,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721437869] [2020-10-16 11:44:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:20,675 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 11:44:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721437869] [2020-10-16 11:44:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001617220] [2020-10-16 11:44:20,676 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 11:44:20,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:20,750 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 11:44:20,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:20,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645037074] [2020-10-16 11:44:20,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:20,751 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 11:44:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:21,661 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:44:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:21,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:21,662 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:44:21,662 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:44:21,662 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 11:44:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:44:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 11:44:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:44:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:44:21,664 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 11:44:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:21,664 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:44:21,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:44:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:21,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:21,664 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:21,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 11:44:21,865 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:21,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 11:44:21,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:21,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579357894] [2020-10-16 11:44:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:22,102 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 11:44:22,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579357894] [2020-10-16 11:44:22,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340830096] [2020-10-16 11:44:22,103 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 11:44:22,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:22,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:22,212 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 11:44:22,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:22,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030189761] [2020-10-16 11:44:22,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:22,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:22,214 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 11:44:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:23,371 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:44:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:23,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:23,372 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:44:23,372 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:44:23,372 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 11:44:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:44:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 11:44:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:44:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:44:23,374 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 11:44:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:23,374 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:44:23,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:44:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:23,374 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:23,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:23,575 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 11:44:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:23,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689220235] [2020-10-16 11:44:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:23,809 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 11:44:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689220235] [2020-10-16 11:44:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98320877] [2020-10-16 11:44:23,810 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 11:44:23,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:23,882 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 11:44:23,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:23,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:23,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107043165] [2020-10-16 11:44:23,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:23,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:23,884 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 11:44:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:24,861 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 11:44:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:24,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:24,862 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:24,862 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:24,863 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 11:44:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 11:44:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:44:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 11:44:24,866 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 11:44:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:24,866 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 11:44:24,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 11:44:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:24,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:24,867 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:25,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:25,068 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 11:44:25,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:25,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857258733] [2020-10-16 11:44:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:25,304 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 11:44:25,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857258733] [2020-10-16 11:44:25,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256879408] [2020-10-16 11:44:25,305 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 11:44:25,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:25,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:25,402 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 11:44:25,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:25,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:25,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921960064] [2020-10-16 11:44:25,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:25,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:25,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:25,404 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 11:44:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:26,635 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 11:44:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:26,636 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:26,636 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:26,636 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:26,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 11:44:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:26,638 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 11:44:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:26,639 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:26,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:26,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:26,639 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:26,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:26,840 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 11:44:26,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:26,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966634459] [2020-10-16 11:44:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:27,074 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 11:44:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966634459] [2020-10-16 11:44:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532146604] [2020-10-16 11:44:27,075 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 11:44:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:27,148 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 11:44:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:27,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017465038] [2020-10-16 11:44:27,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:27,150 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 11:44:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:28,187 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 11:44:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:28,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:28,189 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:44:28,189 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:44:28,190 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 11:44:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:44:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 11:44:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 11:44:28,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 11:44:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:28,194 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 11:44:28,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 11:44:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:28,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:28,194 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:28,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:28,404 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 11:44:28,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:28,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048629847] [2020-10-16 11:44:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:28,640 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 11:44:28,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048629847] [2020-10-16 11:44:28,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594807572] [2020-10-16 11:44:28,640 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 11:44:28,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:28,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:28,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:28,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:28,731 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 11:44:28,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:28,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:28,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101655085] [2020-10-16 11:44:28,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:28,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:28,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:28,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:28,733 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 11:44:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:29,997 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 11:44:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:29,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:29,998 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:44:29,998 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:29,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 11:44:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:44:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 11:44:30,001 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 11:44:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:30,001 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 11:44:30,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 11:44:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:30,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:30,002 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:30,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:30,203 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 11:44:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:30,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796022137] [2020-10-16 11:44:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:30,540 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 11:44:30,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796022137] [2020-10-16 11:44:30,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237486582] [2020-10-16 11:44:30,541 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 11:44:30,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:30,608 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 11:44:30,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:30,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:30,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258157641] [2020-10-16 11:44:30,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:30,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:30,619 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 11:44:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:31,153 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 11:44:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:31,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:31,155 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:44:31,155 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:44:31,156 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 11:44:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:44:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 11:44:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:31,158 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:31,158 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:31,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:31,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:31,159 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:31,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 11:44:31,360 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 11:44:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:31,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137786132] [2020-10-16 11:44:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:31,703 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 11:44:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137786132] [2020-10-16 11:44:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507457756] [2020-10-16 11:44:31,704 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 11:44:31,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:31,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:31,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:31,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:31,792 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 11:44:31,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:31,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:31,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137247403] [2020-10-16 11:44:31,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:31,793 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:32,430 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 11:44:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:32,431 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:32,432 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:44:32,432 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:44:32,432 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 11:44:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:44:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 11:44:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:32,435 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:32,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:32,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:32,436 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:32,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 11:44:32,637 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 11:44:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925373007] [2020-10-16 11:44:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:32,958 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 11:44:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925373007] [2020-10-16 11:44:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969241383] [2020-10-16 11:44:32,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:44:33,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:33,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:33,036 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 11:44:33,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:33,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028157907] [2020-10-16 11:44:33,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:33,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:33,037 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:33,698 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 11:44:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:33,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:33,700 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:44:33,700 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:44:33,700 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 11:44:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:44:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 11:44:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:33,702 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:33,702 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:33,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:33,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:33,703 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:33,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:33,904 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 11:44:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:33,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303335613] [2020-10-16 11:44:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:34,234 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 11:44:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303335613] [2020-10-16 11:44:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625995001] [2020-10-16 11:44:34,235 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 11:44:34,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:34,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:34,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:34,326 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 11:44:34,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:34,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:34,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804011406] [2020-10-16 11:44:34,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:34,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:34,327 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:35,110 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 11:44:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:35,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:35,112 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:35,112 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:35,113 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 11:44:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 11:44:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:35,115 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:35,115 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:35,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:35,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:35,116 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:35,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 11:44:35,317 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 11:44:35,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:35,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268955550] [2020-10-16 11:44:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:35,623 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 11:44:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268955550] [2020-10-16 11:44:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302645237] [2020-10-16 11:44:35,624 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 11:44:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:35,689 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 11:44:35,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:35,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681295205] [2020-10-16 11:44:35,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:35,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:35,690 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:36,418 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 11:44:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:36,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:36,420 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:36,420 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:36,420 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 11:44:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 11:44:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:36,422 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:36,422 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:36,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:36,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:36,423 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:36,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:36,624 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 11:44:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356642950] [2020-10-16 11:44:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:36,933 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 11:44:36,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356642950] [2020-10-16 11:44:36,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104189280] [2020-10-16 11:44:36,934 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 11:44:36,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:37,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:37,024 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 11:44:37,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:37,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310871635] [2020-10-16 11:44:37,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:37,025 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:37,920 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 11:44:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:37,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:37,922 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:37,922 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:37,922 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 11:44:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 11:44:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:37,924 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:37,925 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:37,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:37,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:37,925 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:38,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:38,132 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 11:44:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:38,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540684631] [2020-10-16 11:44:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540684631] [2020-10-16 11:44:38,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895778630] [2020-10-16 11:44:38,414 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 11:44:38,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:38,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:38,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:38,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:38,493 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 11:44:38,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:38,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485622654] [2020-10-16 11:44:38,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:38,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:38,495 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:39,306 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:44:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:39,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:39,308 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:39,308 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:39,308 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 11:44:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 11:44:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:39,311 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:39,311 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:39,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:39,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:39,312 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:39,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:39,512 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 11:44:39,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:39,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294737146] [2020-10-16 11:44:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:39,807 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 11:44:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294737146] [2020-10-16 11:44:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996518533] [2020-10-16 11:44:39,807 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 11:44:39,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:39,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:39,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:39,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:39,901 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 11:44:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499947872] [2020-10-16 11:44:39,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:39,903 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:40,890 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 11:44:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:40,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:40,892 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:40,893 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:40,893 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 11:44:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 11:44:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:40,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:40,896 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:40,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:40,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:40,897 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:41,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:41,106 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 11:44:41,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:41,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76389728] [2020-10-16 11:44:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:41,395 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 11:44:41,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76389728] [2020-10-16 11:44:41,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083761410] [2020-10-16 11:44:41,396 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 11:44:41,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:41,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:41,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:41,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018160245] [2020-10-16 11:44:41,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:41,468 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:42,339 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 11:44:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:42,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:42,340 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:42,341 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:42,341 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 11:44:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 11:44:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:42,343 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:42,343 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:42,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:42,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:42,344 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:42,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 11:44:42,545 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 11:44:42,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:42,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11296521] [2020-10-16 11:44:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:42,829 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 11:44:42,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11296521] [2020-10-16 11:44:42,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093591374] [2020-10-16 11:44:42,830 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 11:44:42,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:42,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:42,934 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 11:44:42,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162794833] [2020-10-16 11:44:42,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:42,935 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:44,132 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 11:44:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:44,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:44,134 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:44,134 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:44,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 11:44:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:44,139 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:44,139 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:44,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:44,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:44,140 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:44,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:44,341 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 11:44:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:44,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240220873] [2020-10-16 11:44:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:44,614 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 11:44:44,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240220873] [2020-10-16 11:44:44,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094694264] [2020-10-16 11:44:44,614 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 11:44:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:44,685 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 11:44:44,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:44,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512840093] [2020-10-16 11:44:44,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:44,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:44,686 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:45,628 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 11:44:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:45,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:45,629 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:44:45,630 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:44:45,630 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 11:44:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:44:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 11:44:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:45,632 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:45,633 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:45,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:45,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:45,633 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:45,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 11:44:45,834 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 11:44:45,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:45,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940687802] [2020-10-16 11:44:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:46,108 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 11:44:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940687802] [2020-10-16 11:44:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97271227] [2020-10-16 11:44:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:44:46,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:46,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:46,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:46,204 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 11:44:46,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:46,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:46,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821733744] [2020-10-16 11:44:46,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:46,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:46,205 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:47,402 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 11:44:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:47,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:47,404 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:44:47,404 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:44:47,404 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 11:44:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:44:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 11:44:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:47,406 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:47,406 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:47,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:47,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:47,406 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:47,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 11:44:47,607 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:47,608 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 11:44:47,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:47,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376715149] [2020-10-16 11:44:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:47,879 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 11:44:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376715149] [2020-10-16 11:44:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42411153] [2020-10-16 11:44:47,880 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 11:44:47,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:47,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:47,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:47,964 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 11:44:47,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:47,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082847963] [2020-10-16 11:44:47,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:47,966 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:49,000 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:49,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:49,001 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:49,001 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:44:49,002 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 11:44:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:44:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 11:44:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:49,004 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:49,004 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:49,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:49,005 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:49,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:49,211 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 11:44:49,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:49,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129761064] [2020-10-16 11:44:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:49,478 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 11:44:49,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129761064] [2020-10-16 11:44:49,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433278709] [2020-10-16 11:44:49,479 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 11:44:49,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:49,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:49,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:49,574 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 11:44:49,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:49,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474652795] [2020-10-16 11:44:49,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:49,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:49,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:49,575 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:50,903 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:44:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:50,904 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:50,905 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:44:50,905 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:44:50,905 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 11:44:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:44:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 11:44:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:50,908 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:50,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:50,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:50,909 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:51,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:51,117 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 11:44:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:51,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866677283] [2020-10-16 11:44:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:51,384 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 11:44:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866677283] [2020-10-16 11:44:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802942635] [2020-10-16 11:44:51,385 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 11:44:51,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:51,464 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 11:44:51,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:51,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067535448] [2020-10-16 11:44:51,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:51,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:51,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:51,466 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:52,553 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 11:44:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:52,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:52,555 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:44:52,555 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:44:52,556 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 11:44:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:44:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 11:44:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:52,558 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:52,558 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:52,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:52,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:52,558 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:52,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:52,759 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 11:44:52,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:52,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879663992] [2020-10-16 11:44:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:53,028 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 11:44:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879663992] [2020-10-16 11:44:53,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887357642] [2020-10-16 11:44:53,029 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 11:44:53,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:53,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:53,138 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 11:44:53,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:53,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151484098] [2020-10-16 11:44:53,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:53,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:53,140 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:54,571 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 11:44:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:54,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:54,573 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:44:54,573 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:44:54,573 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 11:44:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:44:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 11:44:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:54,576 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:54,576 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:54,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:54,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:54,577 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:54,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 11:44:54,784 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 11:44:54,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:54,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825904606] [2020-10-16 11:44:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:55,047 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 11:44:55,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825904606] [2020-10-16 11:44:55,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601531502] [2020-10-16 11:44:55,048 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 11:44:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:55,123 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 11:44:55,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:55,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540756119] [2020-10-16 11:44:55,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:55,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:55,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:55,125 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:56,308 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 11:44:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:56,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:56,309 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:56,310 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:56,310 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 11:44:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 11:44:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 11:44:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 11:44:56,313 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 11:44:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:56,313 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 11:44:56,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 11:44:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:56,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:56,314 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:56,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:56,515 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 11:44:56,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:56,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747697775] [2020-10-16 11:44:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:56,782 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 11:44:56,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747697775] [2020-10-16 11:44:56,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440877721] [2020-10-16 11:44:56,783 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 11:44:56,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:56,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:56,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:56,886 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 11:44:56,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:56,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136285702] [2020-10-16 11:44:56,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:56,888 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 11:44:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:58,349 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 11:44:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:44:58,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:58,354 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:44:58,354 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:44:58,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:44:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 11:44:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:44:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 11:44:58,356 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 11:44:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:58,356 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 11:44:58,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 11:44:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:58,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:58,357 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:58,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:58,557 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:58,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 11:44:58,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:58,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871696017] [2020-10-16 11:44:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:58,821 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 11:44:58,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871696017] [2020-10-16 11:44:58,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081461461] [2020-10-16 11:44:58,822 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 11:44:58,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:58,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:58,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:58,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885419754] [2020-10-16 11:44:58,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:58,932 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 11:45:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:00,307 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 11:45:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:00,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:45:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:00,308 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:45:00,308 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:45:00,308 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 11:45:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:45:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 11:45:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:45:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:45:00,310 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 11:45:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:00,310 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:45:00,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:45:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:00,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:00,310 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:00,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:00,511 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 11:45:00,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:00,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107395581] [2020-10-16 11:45:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:00,799 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 11:45:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107395581] [2020-10-16 11:45:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119143443] [2020-10-16 11:45:00,800 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 11:45:00,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:00,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:45:00,903 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 11:45:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:00,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515197815] [2020-10-16 11:45:00,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:00,905 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 11:45:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:02,335 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 11:45:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:02,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:02,336 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:45:02,336 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:45:02,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:45:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:45:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 11:45:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:45:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 11:45:02,338 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 11:45:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:02,338 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 11:45:02,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 11:45:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:02,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:02,339 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:02,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:02,542 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 11:45:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:02,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770761296] [2020-10-16 11:45:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:02,921 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 11:45:02,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770761296] [2020-10-16 11:45:02,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496668246] [2020-10-16 11:45:02,921 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 11:45:02,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:02,984 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 11:45:02,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:02,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:02,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086408783] [2020-10-16 11:45:02,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:02,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:02,985 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 11:45:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:03,604 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 11:45:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:45:03,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:03,605 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:45:03,605 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:45:03,606 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 11:45:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:45:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 11:45:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:45:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 11:45:03,607 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 11:45:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:03,608 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 11:45:03,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 11:45:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:03,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:03,608 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:03,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 11:45:03,809 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 11:45:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:03,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313407344] [2020-10-16 11:45:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:04,190 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 11:45:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313407344] [2020-10-16 11:45:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817867703] [2020-10-16 11:45:04,191 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 11:45:04,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:04,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:04,293 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 11:45:04,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:04,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:04,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470345655] [2020-10-16 11:45:04,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:04,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:04,294 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 11:45:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:04,983 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 11:45:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:45:04,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:04,985 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:45:04,985 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:45:04,986 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 11:45:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:45:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 11:45:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:45:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 11:45:04,988 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 11:45:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:04,989 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 11:45:04,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 11:45:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:04,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:04,989 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:05,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 11:45:05,197 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 11:45:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:05,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310543812] [2020-10-16 11:45:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:05,574 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 11:45:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310543812] [2020-10-16 11:45:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907918325] [2020-10-16 11:45:05,574 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 11:45:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:05,640 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 11:45:05,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:05,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:05,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909778182] [2020-10-16 11:45:05,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:05,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:05,642 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 11:45:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:06,372 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 11:45:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:06,373 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:06,373 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:45:06,373 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:06,374 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 11:45:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 11:45:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:45:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 11:45:06,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 11:45:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:06,376 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 11:45:06,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 11:45:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:06,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:06,377 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:06,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 11:45:06,578 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 11:45:06,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:06,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630342187] [2020-10-16 11:45:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:06,964 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 11:45:06,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630342187] [2020-10-16 11:45:06,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553026040] [2020-10-16 11:45:06,965 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 11:45:07,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:07,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:07,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:07,062 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 11:45:07,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:07,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:07,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155595141] [2020-10-16 11:45:07,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:07,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:07,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:07,063 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 11:45:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:07,849 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 11:45:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:07,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:07,850 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:07,850 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:07,850 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 11:45:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 11:45:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:45:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 11:45:07,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 11:45:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:07,852 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 11:45:07,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 11:45:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:07,853 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:08,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 11:45:08,059 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 11:45:08,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:08,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607331628] [2020-10-16 11:45:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:08,428 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 11:45:08,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607331628] [2020-10-16 11:45:08,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242057376] [2020-10-16 11:45:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:45:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:08,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:08,499 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 11:45:08,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:08,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:08,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89372526] [2020-10-16 11:45:08,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:08,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:08,501 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 11:45:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:09,263 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 11:45:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:09,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:09,264 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:09,264 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:09,264 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 11:45:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 11:45:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:45:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 11:45:09,266 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 11:45:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:09,266 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 11:45:09,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 11:45:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:09,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:09,267 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:09,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,468 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 11:45:09,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:09,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784403731] [2020-10-16 11:45:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:09,831 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 11:45:09,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784403731] [2020-10-16 11:45:09,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070203822] [2020-10-16 11:45:09,832 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 11:45:09,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:09,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:09,923 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 11:45:09,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:09,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765040292] [2020-10-16 11:45:09,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:09,924 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 11:45:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:10,820 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 11:45:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:10,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:10,821 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:45:10,821 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:45:10,822 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 11:45:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:45:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 11:45:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:45:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 11:45:10,824 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 11:45:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:10,824 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 11:45:10,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 11:45:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:10,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:10,825 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:11,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 11:45:11,026 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 11:45:11,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:11,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140262412] [2020-10-16 11:45:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:11,365 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 11:45:11,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140262412] [2020-10-16 11:45:11,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5916801] [2020-10-16 11:45:11,366 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 11:45:11,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:11,442 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 11:45:11,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:11,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566794674] [2020-10-16 11:45:11,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:11,443 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 11:45:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:12,324 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 11:45:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:12,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:12,325 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:12,325 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:12,326 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 11:45:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 11:45:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:45:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 11:45:12,328 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 11:45:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:12,328 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 11:45:12,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 11:45:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:12,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:12,329 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:12,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:12,530 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 11:45:12,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:12,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804282764] [2020-10-16 11:45:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:12,877 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 11:45:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804282764] [2020-10-16 11:45:12,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709405500] [2020-10-16 11:45:12,878 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 11:45:12,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:12,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:12,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:12,985 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 11:45:12,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:12,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:12,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216854086] [2020-10-16 11:45:12,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:12,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:12,986 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 11:45:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:14,005 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 11:45:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:14,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:14,007 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:14,007 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:14,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 11:45:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:45:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 11:45:14,010 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 11:45:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:14,010 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 11:45:14,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 11:45:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:14,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:14,010 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:14,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 11:45:14,211 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 11:45:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:14,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046652365] [2020-10-16 11:45:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:14,542 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 11:45:14,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046652365] [2020-10-16 11:45:14,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627172160] [2020-10-16 11:45:14,543 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 11:45:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:14,619 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 11:45:14,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:14,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:14,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175967] [2020-10-16 11:45:14,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:14,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:14,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:14,620 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 11:45:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:15,559 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 11:45:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:15,560 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:15,560 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:45:15,560 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:45:15,560 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 11:45:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:45:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 11:45:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:45:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 11:45:15,562 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 11:45:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:15,562 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 11:45:15,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 11:45:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:15,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:15,563 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:15,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:15,764 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 11:45:15,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:15,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250626731] [2020-10-16 11:45:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:16,097 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 11:45:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250626731] [2020-10-16 11:45:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481298755] [2020-10-16 11:45:16,098 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 11:45:16,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:16,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:16,194 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 11:45:16,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:16,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:16,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353142779] [2020-10-16 11:45:16,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:16,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:16,195 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 11:45:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:17,302 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 11:45:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:17,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:17,303 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:45:17,303 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:45:17,304 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 11:45:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:45:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 11:45:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:45:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 11:45:17,306 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 11:45:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:17,306 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 11:45:17,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 11:45:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:17,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:17,307 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:17,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:17,508 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 11:45:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:17,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055108797] [2020-10-16 11:45:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:17,827 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 11:45:17,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055108797] [2020-10-16 11:45:17,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829766946] [2020-10-16 11:45:17,828 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 11:45:17,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:17,905 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 11:45:17,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:17,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:17,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185636167] [2020-10-16 11:45:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:17,906 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 11:45:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:18,921 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 11:45:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:18,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:18,922 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:18,922 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:18,923 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 11:45:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 11:45:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:45:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 11:45:18,925 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 11:45:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:18,925 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 11:45:18,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 11:45:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:18,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:18,926 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:19,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:19,127 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 11:45:19,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:19,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875278331] [2020-10-16 11:45:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:19,445 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 11:45:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875278331] [2020-10-16 11:45:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349403978] [2020-10-16 11:45:19,446 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 11:45:19,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:19,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:19,546 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 11:45:19,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:19,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:19,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770355187] [2020-10-16 11:45:19,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:19,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:19,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:19,547 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 11:45:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:20,753 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 11:45:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:20,754 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:20,754 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:20,754 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:20,754 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 11:45:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 11:45:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:45:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 11:45:20,756 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 11:45:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:20,756 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 11:45:20,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 11:45:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:20,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:20,757 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:20,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:20,958 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 11:45:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:20,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330801892] [2020-10-16 11:45:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:21,271 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 11:45:21,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330801892] [2020-10-16 11:45:21,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805892309] [2020-10-16 11:45:21,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:45:21,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:21,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:21,355 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 11:45:21,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:21,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:21,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855476639] [2020-10-16 11:45:21,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:21,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:21,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:21,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:21,356 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 11:45:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:22,454 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 11:45:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:22,455 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:22,455 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:45:22,456 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:45:22,456 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 11:45:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:45:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 11:45:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:45:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 11:45:22,458 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 11:45:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:22,458 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 11:45:22,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 11:45:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:22,459 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:22,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 11:45:22,660 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 11:45:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:22,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812562677] [2020-10-16 11:45:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:22,968 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 11:45:22,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812562677] [2020-10-16 11:45:22,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962812521] [2020-10-16 11:45:22,969 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 11:45:23,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:23,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:23,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:23,075 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 11:45:23,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:23,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944425764] [2020-10-16 11:45:23,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:23,077 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 11:45:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:24,387 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 11:45:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:24,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:24,388 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:45:24,388 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:45:24,388 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 11:45:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:45:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 11:45:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:45:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 11:45:24,390 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 11:45:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 11:45:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 11:45:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:24,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:24,391 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:24,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 11:45:24,592 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 11:45:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:24,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286552747] [2020-10-16 11:45:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:24,903 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 11:45:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286552747] [2020-10-16 11:45:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127504658] [2020-10-16 11:45:24,903 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 11:45:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:24,977 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 11:45:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505611367] [2020-10-16 11:45:24,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:24,978 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 11:45:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:26,130 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 11:45:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:26,130 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:26,131 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:26,131 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:26,131 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 11:45:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 11:45:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:45:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:45:26,133 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 11:45:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:26,133 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:45:26,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:45:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:26,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:26,134 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:26,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 11:45:26,335 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 11:45:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:26,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760651375] [2020-10-16 11:45:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:26,646 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 11:45:26,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760651375] [2020-10-16 11:45:26,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744888873] [2020-10-16 11:45:26,647 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 11:45:26,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:26,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:26,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:26,751 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 11:45:26,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:26,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:26,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86469820] [2020-10-16 11:45:26,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:26,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:26,753 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 11:45:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:28,186 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 11:45:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:45:28,186 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:28,187 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:28,187 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:28,187 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 11:45:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 11:45:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:45:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:45:28,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 11:45:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:28,190 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:45:28,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:45:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:28,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:28,190 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:28,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 11:45:28,391 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:28,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:28,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 11:45:28,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:28,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94612310] [2020-10-16 11:45:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:28,691 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 11:45:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94612310] [2020-10-16 11:45:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909155816] [2020-10-16 11:45:28,692 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 11:45:28,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:28,782 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 11:45:28,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:28,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579083399] [2020-10-16 11:45:28,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:28,783 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 11:45:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:30,014 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 11:45:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 11:45:30,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:30,016 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:45:30,016 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:45:30,017 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 11:45:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:45:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 11:45:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 11:45:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 11:45:30,019 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 11:45:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:30,019 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 11:45:30,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 11:45:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:30,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:30,019 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:30,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:30,220 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 11:45:30,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:30,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293716848] [2020-10-16 11:45:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:30,525 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 11:45:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293716848] [2020-10-16 11:45:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247873982] [2020-10-16 11:45:30,526 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 11:45:30,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:30,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:30,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:30,628 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 11:45:30,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:30,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:30,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277537420] [2020-10-16 11:45:30,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:30,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:30,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:30,630 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 11:45:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:32,175 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 11:45:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:45:32,176 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:32,176 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:45:32,176 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:45:32,176 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 11:45:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:45:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 11:45:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:45:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:45:32,179 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 11:45:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:45:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:45:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:32,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:32,180 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:32,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 11:45:32,390 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 11:45:32,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:32,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813417610] [2020-10-16 11:45:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:32,692 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 11:45:32,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813417610] [2020-10-16 11:45:32,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586033082] [2020-10-16 11:45:32,693 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 11:45:32,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:32,777 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 11:45:32,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:32,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:32,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392773910] [2020-10-16 11:45:32,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:32,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:32,779 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 11:45:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:34,098 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 11:45:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 11:45:34,098 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:34,099 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:34,099 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:34,099 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 11:45:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 11:45:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:45:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 11:45:34,101 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 11:45:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:34,101 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 11:45:34,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 11:45:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:34,102 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:34,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:34,306 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 11:45:34,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:34,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229642779] [2020-10-16 11:45:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:34,617 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 11:45:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229642779] [2020-10-16 11:45:34,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420419558] [2020-10-16 11:45:34,618 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 11:45:34,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:34,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:34,726 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 11:45:34,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:34,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:34,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185572808] [2020-10-16 11:45:34,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:34,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:34,728 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 11:45:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:36,342 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 11:45:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 11:45:36,343 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:36,343 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:36,343 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:36,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 11:45:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 11:45:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:45:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 11:45:36,345 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 11:45:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:36,345 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 11:45:36,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 11:45:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:36,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:36,346 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:36,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 11:45:36,547 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 11:45:36,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:36,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711966332] [2020-10-16 11:45:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:36,980 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 11:45:36,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711966332] [2020-10-16 11:45:36,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078455659] [2020-10-16 11:45:36,980 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 11:45:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:37,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:37,045 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 11:45:37,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:37,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:37,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806674030] [2020-10-16 11:45:37,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:37,047 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-16 11:45:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:37,793 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-16 11:45:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:45:37,794 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:37,795 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:37,795 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:37,795 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 11:45:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-16 11:45:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:37,798 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:37,798 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:37,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:37,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:37,799 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:37,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:38,000 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:38,000 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-16 11:45:38,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:38,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778026343] [2020-10-16 11:45:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:38,446 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 11:45:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778026343] [2020-10-16 11:45:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811731513] [2020-10-16 11:45:38,446 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 11:45:38,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:38,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:38,542 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 11:45:38,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:38,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988993003] [2020-10-16 11:45:38,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:38,543 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:39,397 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-16 11:45:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:39,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:39,399 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:45:39,400 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 11:45:39,400 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 11:45:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 11:45:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-16 11:45:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:39,402 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:39,402 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:39,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:39,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:39,402 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:39,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-16 11:45:39,603 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-16 11:45:39,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:39,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911962171] [2020-10-16 11:45:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:40,010 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 11:45:40,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911962171] [2020-10-16 11:45:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518028137] [2020-10-16 11:45:40,011 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 11:45:40,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:40,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:40,088 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 11:45:40,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:40,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:40,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977232429] [2020-10-16 11:45:40,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:40,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:40,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:40,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:40,089 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:40,894 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-16 11:45:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:40,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:40,895 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:45:40,895 INFO L226 Difference]: Without dead ends: 132 [2020-10-16 11:45:40,896 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 11:45:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-16 11:45:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-16 11:45:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:40,898 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:40,899 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:40,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:40,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:40,899 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:41,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:41,100 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-16 11:45:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:41,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993798739] [2020-10-16 11:45:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:41,527 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 11:45:41,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993798739] [2020-10-16 11:45:41,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604180865] [2020-10-16 11:45:41,528 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 11:45:41,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:41,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:41,624 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 11:45:41,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:41,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:41,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988724718] [2020-10-16 11:45:41,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:41,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:41,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:41,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:41,625 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:42,570 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-16 11:45:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:42,571 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:42,572 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:42,572 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:42,572 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 11:45:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-16 11:45:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:42,575 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:42,575 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:42,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:42,575 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:42,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-16 11:45:42,776 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-16 11:45:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:42,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453741867] [2020-10-16 11:45:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:43,172 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 11:45:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453741867] [2020-10-16 11:45:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974777352] [2020-10-16 11:45:43,173 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 11:45:43,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:43,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:43,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:43,244 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 11:45:43,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:43,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961051664] [2020-10-16 11:45:43,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:43,245 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:44,132 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-16 11:45:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:44,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:44,133 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:44,133 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:44,134 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 11:45:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-16 11:45:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:44,136 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:44,136 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:44,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:44,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:44,136 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:44,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-16 11:45:44,337 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-16 11:45:44,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:44,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864290900] [2020-10-16 11:45:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:44,739 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 11:45:44,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864290900] [2020-10-16 11:45:44,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472530452] [2020-10-16 11:45:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:45:44,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:44,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:44,844 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 11:45:44,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:44,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:44,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989205075] [2020-10-16 11:45:44,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:44,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:44,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:44,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:44,845 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:45,924 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-16 11:45:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:45,925 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:45,926 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:45,926 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:45,926 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 11:45:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-16 11:45:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:45,929 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:45,929 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:45,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:45,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:45,930 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:46,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-16 11:45:46,134 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-16 11:45:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:46,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246690618] [2020-10-16 11:45:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:46,514 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 11:45:46,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246690618] [2020-10-16 11:45:46,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886979106] [2020-10-16 11:45:46,515 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 11:45:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:46,591 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 11:45:46,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:46,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:46,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116948813] [2020-10-16 11:45:46,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:46,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:46,593 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:47,567 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-16 11:45:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:47,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:47,569 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:47,569 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:47,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-16 11:45:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:47,571 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:47,572 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:47,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:47,572 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:47,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:47,773 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-16 11:45:47,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:47,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283381170] [2020-10-16 11:45:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:48,163 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 11:45:48,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283381170] [2020-10-16 11:45:48,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499149949] [2020-10-16 11:45:48,164 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 11:45:48,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:48,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:48,266 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 11:45:48,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:48,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554021810] [2020-10-16 11:45:48,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:48,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:48,268 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:49,464 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 11:45:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:49,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:49,466 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:49,466 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:49,466 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 11:45:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-16 11:45:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:49,473 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:49,473 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:49,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:49,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:49,474 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:49,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-16 11:45:49,675 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-16 11:45:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:49,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832003341] [2020-10-16 11:45:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:50,036 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 11:45:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832003341] [2020-10-16 11:45:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363350269] [2020-10-16 11:45:50,037 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 11:45:50,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:50,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:50,115 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 11:45:50,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:50,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:50,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820593143] [2020-10-16 11:45:50,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:50,116 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:51,186 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-16 11:45:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:51,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:51,188 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:51,188 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:51,188 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 11:45:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-16 11:45:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:51,190 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:51,191 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:51,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:51,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:51,191 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:51,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:51,392 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-16 11:45:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:51,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163370777] [2020-10-16 11:45:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:51,764 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 11:45:51,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163370777] [2020-10-16 11:45:51,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629989183] [2020-10-16 11:45:51,765 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 11:45:51,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:51,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:51,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:51,872 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 11:45:51,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:51,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:51,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253439417] [2020-10-16 11:45:51,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:51,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:51,874 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:53,201 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-16 11:45:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:53,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:53,203 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:53,203 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:45:53,203 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 11:45:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:45:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-16 11:45:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:53,206 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:53,206 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:53,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:53,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:53,206 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:53,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-16 11:45:53,410 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-16 11:45:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:53,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694860583] [2020-10-16 11:45:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:53,757 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 11:45:53,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694860583] [2020-10-16 11:45:53,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796007113] [2020-10-16 11:45:53,757 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 11:45:53,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:53,840 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 11:45:53,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:53,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:53,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315218140] [2020-10-16 11:45:53,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:53,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:53,841 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:55,015 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-16 11:45:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:55,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:55,017 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:45:55,017 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:45:55,017 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 11:45:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:45:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-16 11:45:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:55,020 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:55,020 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:55,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:55,021 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:55,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:55,230 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-16 11:45:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:55,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134215255] [2020-10-16 11:45:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:55,597 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 11:45:55,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134215255] [2020-10-16 11:45:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552179514] [2020-10-16 11:45:55,598 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 11:45:55,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:55,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:55,704 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 11:45:55,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:55,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:55,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012460843] [2020-10-16 11:45:55,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:55,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:55,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:55,705 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:57,151 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-16 11:45:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:57,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:57,153 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:45:57,153 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:45:57,153 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 11:45:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:45:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-16 11:45:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:57,156 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:57,156 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:57,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:57,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:57,156 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:57,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-16 11:45:57,357 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-16 11:45:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:57,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254604379] [2020-10-16 11:45:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:57,706 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 11:45:57,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254604379] [2020-10-16 11:45:57,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355560401] [2020-10-16 11:45:57,707 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 11:45:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:57,786 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 11:45:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929101668] [2020-10-16 11:45:57,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:57,787 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:59,053 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-16 11:45:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:59,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:59,055 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:45:59,055 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:45:59,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:45:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-16 11:45:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:59,057 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:59,057 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:59,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:59,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:59,058 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:59,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:59,258 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-16 11:45:59,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:59,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017616790] [2020-10-16 11:45:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:59,617 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 11:45:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017616790] [2020-10-16 11:45:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894549470] [2020-10-16 11:45:59,618 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 11:45:59,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:59,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:59,720 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 11:45:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:59,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:59,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783203436] [2020-10-16 11:45:59,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:59,722 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:46:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:01,285 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-16 11:46:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:46:01,286 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:46:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:01,287 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:46:01,287 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:46:01,288 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 11:46:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:46:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-16 11:46:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:46:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:46:01,290 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:46:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:01,290 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:46:01,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:46:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:46:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:01,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:01,291 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:01,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:01,500 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-16 11:46:01,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:01,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102816635] [2020-10-16 11:46:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:01,841 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 11:46:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102816635] [2020-10-16 11:46:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300026075] [2020-10-16 11:46:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:46:01,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:46:01,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:01,930 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 11:46:01,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:01,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:46:01,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417713855] [2020-10-16 11:46:01,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:46:01,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:46:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:46:01,932 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:46:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:03,286 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 11:46:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:46:03,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:46:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:03,287 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:46:03,287 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:46:03,288 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 11:46:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:46:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-16 11:46:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:46:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:46:03,290 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:46:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:03,291 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:46:03,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:46:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:46:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:03,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:03,291 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:03,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-16 11:46:03,492 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-16 11:46:03,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:03,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325214743] [2020-10-16 11:46:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:03,843 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 11:46:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325214743] [2020-10-16 11:46:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715974497] [2020-10-16 11:46:03,844 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 11:46:03,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:46:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:03,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:46:03,980 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 11:46:03,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:03,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:46:03,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122049454] [2020-10-16 11:46:03,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:46:03,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:46:03,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:46:03,981 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:46:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:05,706 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:46:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:46:05,707 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:46:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:05,707 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:46:05,708 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:46:05,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 11:46:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:46:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-16 11:46:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:46:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:46:05,710 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:46:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:05,710 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:46:05,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:46:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:46:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:05,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:05,711 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:05,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-16 11:46:05,912 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:05,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-16 11:46:05,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:05,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135088990] [2020-10-16 11:46:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:06,264 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 11:46:06,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135088990] [2020-10-16 11:46:06,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339495943] [2020-10-16 11:46:06,264 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:06,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:46:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:06,346 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 11:46:06,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:06,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:46:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941591229] [2020-10-16 11:46:06,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:46:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:46:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:46:06,348 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:46:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:07,778 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-16 11:46:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 11:46:07,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:46:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:07,779 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:46:07,779 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:46:07,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:46:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:46:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-16 11:46:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:46:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:46:07,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:46:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:07,782 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:46:07,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:46:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:46:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:07,783 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:07,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-16 11:46:07,983 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-16 11:46:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:07,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783831197] [2020-10-16 11:46:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:08,323 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 11:46:08,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783831197] [2020-10-16 11:46:08,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281793081] [2020-10-16 11:46:08,324 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:08,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:46:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:08,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:46:08,454 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 11:46:08,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:08,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:46:08,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90335756] [2020-10-16 11:46:08,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:46:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:08,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:46:08,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:46:08,456 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. Received shutdown request... [2020-10-16 11:46:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:46:08,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-16 11:46:08,958 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:46:08,962 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:46:08,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:46:08 BasicIcfg [2020-10-16 11:46:08,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:46:08,964 INFO L168 Benchmark]: Toolchain (without parser) took 269446.16 ms. Allocated memory was 138.9 MB in the beginning and 190.3 MB in the end (delta: 51.4 MB). Free memory was 100.4 MB in the beginning and 97.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,965 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.92 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.2 MB in the beginning and 159.0 MB in the end (delta: -58.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,965 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.99 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,966 INFO L168 Benchmark]: Boogie Preprocessor took 26.29 ms. Allocated memory is still 201.9 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,966 INFO L168 Benchmark]: RCFGBuilder took 444.94 ms. Allocated memory is still 201.9 MB. Free memory was 155.6 MB in the beginning and 135.0 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,967 INFO L168 Benchmark]: TraceAbstraction took 268200.16 ms. Allocated memory was 201.9 MB in the beginning and 190.3 MB in the end (delta: -11.5 MB). Free memory was 134.4 MB in the beginning and 97.4 MB in the end (delta: 37.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:08,969 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 722.92 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.2 MB in the beginning and 159.0 MB in the end (delta: -58.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.99 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.29 ms. Allocated memory is still 201.9 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.94 ms. Allocated memory is still 201.9 MB. Free memory was 155.6 MB in the beginning and 135.0 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 268200.16 ms. Allocated memory was 201.9 MB in the beginning and 190.3 MB in the end (delta: -11.5 MB). Free memory was 134.4 MB in the beginning and 97.4 MB in the end (delta: 37.0 MB). Peak memory consumption was 25.5 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: 1.1s, 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 11 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (28 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 268.0s, OverallIterations: 236, TraceHistogramMax: 10, AutomataDifference: 152.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 3771 SDtfs, 13347 SDslu, 24868 SDs, 0 SdLazy, 26835 SolverSat, 15614 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13262 GetRequests, 4373 SyntacticMatches, 231 SemanticMatches, 8658 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86821 ImplicationChecksByTransitivity, 157.6s 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, 235 MinimizatonAttempts, 5976 StatesRemovedByMinimization, 234 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 9962 NumberOfCodeBlocks, 9962 NumberOfCodeBlocksAsserted, 1240 NumberOfCheckSat, 9495 ConstructedInterpolants, 0 QuantifiedInterpolants, 931381 SizeOfPredicates, 3111 NumberOfNonLiveVariables, 30339 ConjunctsInSsa, 4041 ConjunctsInUnsatCore, 467 InterpolantComputations, 5 PerfectInterpolantSequences, 0/20490 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