/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 16:20:38,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 16:20:38,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 16:20:38,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 16:20:38,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 16:20:38,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 16:20:38,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 16:20:38,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 16:20:38,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 16:20:38,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 16:20:38,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 16:20:38,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 16:20:38,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 16:20:38,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 16:20:38,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 16:20:38,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 16:20:38,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 16:20:38,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 16:20:38,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 16:20:38,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 16:20:38,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 16:20:38,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 16:20:38,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 16:20:38,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 16:20:38,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 16:20:38,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 16:20:38,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 16:20:38,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 16:20:38,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 16:20:38,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 16:20:38,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 16:20:38,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 16:20:38,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 16:20:38,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 16:20:38,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 16:20:38,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 16:20:38,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 16:20:38,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 16:20:38,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 16:20:38,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 16:20:38,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 16:20:38,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf [2020-11-09 16:20:38,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 16:20:38,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 16:20:38,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 16:20:38,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 16:20:38,274 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 16:20:38,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 16:20:38,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 16:20:38,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 16:20:38,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 16:20:38,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 16:20:38,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 16:20:38,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 16:20:38,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 16:20:38,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 16:20:38,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 16:20:38,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 16:20:38,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 16:20:38,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 16:20:38,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 16:20:38,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 16:20:38,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 16:20:38,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 16:20:38,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 16:20:38,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 16:20:38,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 16:20:38,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 16:20:38,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 16:20:38,282 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-11-09 16:20:38,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 16:20:38,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 16:20:38,283 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 16:20:38,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 16:20:38,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 16:20:38,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 16:20:38,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 16:20:38,816 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 16:20:38,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 16:20:38,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19babe5f6/d40dbaaf6eed4eb0b58875471a2c4143/FLAG7bf35e5e0 [2020-11-09 16:20:39,548 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 16:20:39,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 16:20:39,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19babe5f6/d40dbaaf6eed4eb0b58875471a2c4143/FLAG7bf35e5e0 [2020-11-09 16:20:39,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19babe5f6/d40dbaaf6eed4eb0b58875471a2c4143 [2020-11-09 16:20:39,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 16:20:39,852 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 16:20:39,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:39,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 16:20:39,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 16:20:39,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:39" (1/1) ... [2020-11-09 16:20:39,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6396d2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:39, skipping insertion in model container [2020-11-09 16:20:39,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:39" (1/1) ... [2020-11-09 16:20:39,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 16:20:39,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 16:20:40,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:40,365 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 16:20:40,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:40,552 INFO L208 MainTranslator]: Completed translation [2020-11-09 16:20:40,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40 WrapperNode [2020-11-09 16:20:40,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:40,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:40,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 16:20:40,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 16:20:40,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:40,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 16:20:40,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 16:20:40,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 16:20:40,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... [2020-11-09 16:20:40,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 16:20:40,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 16:20:40,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 16:20:40,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 16:20:40,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 16:20:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 16:20:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 16:20:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 16:20:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 16:20:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 16:20:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 16:20:40,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 16:20:40,716 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 16:20:41,154 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 16:20:41,154 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 16:20:41,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:41 BoogieIcfgContainer [2020-11-09 16:20:41,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 16:20:41,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 16:20:41,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 16:20:41,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 16:20:41,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:20:39" (1/3) ... [2020-11-09 16:20:41,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cff45d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:41, skipping insertion in model container [2020-11-09 16:20:41,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:40" (2/3) ... [2020-11-09 16:20:41,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cff45d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:41, skipping insertion in model container [2020-11-09 16:20:41,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:41" (3/3) ... [2020-11-09 16:20:41,166 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-11-09 16:20:41,184 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 16:20:41,184 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 16:20:41,188 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 16:20:41,189 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 16:20:41,223 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,223 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,223 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,224 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,224 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,224 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,224 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,225 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,225 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,225 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,227 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,227 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,227 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,227 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,228 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,230 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,230 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,230 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,231 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,231 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,233 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,233 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,233 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,233 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,234 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,234 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,234 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,234 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,235 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,235 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,235 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,235 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,236 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,236 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,236 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,236 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,240 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,240 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,247 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,247 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:41,250 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 16:20:41,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 16:20:41,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 16:20:41,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 16:20:41,289 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 16:20:41,289 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-11-09 16:20:41,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 16:20:41,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 16:20:41,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 16:20:41,290 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 16:20:41,302 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 16:20:41,303 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:41,307 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:41,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:41,363 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 16:20:41,363 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 16:20:41,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 16:20:41,375 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 16:20:43,143 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:43,310 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:44,052 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:44,164 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:44,427 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:44,546 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:45,020 WARN L194 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:45,175 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:45,523 WARN L194 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:45,689 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:45,737 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 16:20:45,737 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 16:20:45,744 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 16:20:45,754 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 16:20:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 16:20:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 16:20:45,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:45,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 16:20:45,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 16:20:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:45,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169931259] [2020-11-09 16:20:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169931259] [2020-11-09 16:20:46,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:46,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 16:20:46,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [489161855] [2020-11-09 16:20:46,021 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:46,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:46,038 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-11-09 16:20:46,038 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:46,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:46,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 16:20:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 16:20:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 16:20:46,065 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 16:20:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:46,133 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 16:20:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 16:20:46,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 16:20:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:46,146 INFO L225 Difference]: With dead ends: 75 [2020-11-09 16:20:46,147 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 16:20:46,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 16:20:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 16:20:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 16:20:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 16:20:46,193 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 16:20:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:46,193 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 16:20:46,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 16:20:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 16:20:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 16:20:46,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:46,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:46,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 16:20:46,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 16:20:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:46,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641274932] [2020-11-09 16:20:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641274932] [2020-11-09 16:20:46,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:46,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 16:20:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [45254970] [2020-11-09 16:20:46,314 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:46,317 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:46,323 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-11-09 16:20:46,323 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:46,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:46,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 16:20:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 16:20:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 16:20:46,382 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 16:20:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:46,420 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 16:20:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 16:20:46,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 16:20:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:46,423 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:46,424 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:46,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 16:20:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 16:20:46,439 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 16:20:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:46,441 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 16:20:46,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 16:20:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 16:20:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:46,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:46,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:46,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 16:20:46,443 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 16:20:46,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:46,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116905396] [2020-11-09 16:20:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116905396] [2020-11-09 16:20:46,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:46,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1584460057] [2020-11-09 16:20:46,634 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:46,635 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:46,639 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-11-09 16:20:46,639 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:46,651 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:46,651 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:46,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:46,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:46,701 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:46,701 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:46,716 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:20:46,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:46,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:46,718 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-11-09 16:20:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:46,832 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-11-09 16:20:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 16:20:46,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:46,834 INFO L225 Difference]: With dead ends: 66 [2020-11-09 16:20:46,835 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:46,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:46,843 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-11-09 16:20:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:46,843 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:46,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:46,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:46,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 16:20:46,845 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-11-09 16:20:46,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:46,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817285226] [2020-11-09 16:20:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817285226] [2020-11-09 16:20:46,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:46,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730089659] [2020-11-09 16:20:46,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:46,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:46,937 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-11-09 16:20:46,938 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:46,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:46,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:46,986 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:46,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:46,989 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-11-09 16:20:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:47,068 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-11-09 16:20:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 16:20:47,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:47,070 INFO L225 Difference]: With dead ends: 67 [2020-11-09 16:20:47,071 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:47,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-11-09 16:20:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-09 16:20:47,079 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-11-09 16:20:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:47,079 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-09 16:20:47,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-09 16:20:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:47,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:47,081 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 16:20:47,081 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-11-09 16:20:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395465746] [2020-11-09 16:20:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395465746] [2020-11-09 16:20:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439411289] [2020-11-09 16:20:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 16:20:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:47,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:47,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1220457489] [2020-11-09 16:20:47,455 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:47,457 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:47,459 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-11-09 16:20:47,459 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:47,501 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:47,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:47,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:47,502 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-11-09 16:20:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:47,683 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 16:20:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:47,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 16:20:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:47,686 INFO L225 Difference]: With dead ends: 63 [2020-11-09 16:20:47,686 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:47,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:20:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 16:20:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 16:20:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 16:20:47,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 16:20:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:47,701 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 16:20:47,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 16:20:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:47,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:47,703 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:47,915 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-11-09 16:20:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084097164] [2020-11-09 16:20:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084097164] [2020-11-09 16:20:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145513145] [2020-11-09 16:20:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:48,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 16:20:48,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:48,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:48,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [893502739] [2020-11-09 16:20:48,122 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,123 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-11-09 16:20:48,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,145 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:48,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:48,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 16:20:48,147 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-11-09 16:20:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,265 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 16:20:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 16:20:48,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-11-09 16:20:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,266 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:48,266 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 16:20:48,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 16:20:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 16:20:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 16:20:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 16:20:48,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 16:20:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,273 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 16:20:48,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 16:20:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,274 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:48,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:48,486 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-11-09 16:20:48,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:48,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450026310] [2020-11-09 16:20:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450026310] [2020-11-09 16:20:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690066704] [2020-11-09 16:20:48,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:48,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:48,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:48,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:48,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 16:20:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [456706824] [2020-11-09 16:20:48,764 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,770 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-11-09 16:20:48,771 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,799 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,819 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:20:48,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:48,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:48,837 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-11-09 16:20:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,980 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 16:20:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:48,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,982 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:48,982 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:48,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:20:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-09 16:20:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 16:20:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-09 16:20:48,988 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-11-09 16:20:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,988 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-09 16:20:48,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-09 16:20:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:48,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:49,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-11-09 16:20:49,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:49,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614363953] [2020-11-09 16:20:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614363953] [2020-11-09 16:20:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815190556] [2020-11-09 16:20:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 16:20:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:49,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:49,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982675382] [2020-11-09 16:20:49,361 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:49,363 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:49,365 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-11-09 16:20:49,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:49,376 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:49,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:49,377 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-11-09 16:20:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:49,598 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:49,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 16:20:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:49,605 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:49,605 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:49,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:20:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-11-09 16:20:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:49,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-11-09 16:20:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:49,611 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:49,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:49,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:49,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:49,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,824 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-11-09 16:20:49,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:49,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188835420] [2020-11-09 16:20:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188835420] [2020-11-09 16:20:49,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715160775] [2020-11-09 16:20:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:50,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1555698085] [2020-11-09 16:20:50,027 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:50,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:50,038 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-11-09 16:20:50,038 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:50,078 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:50,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:50,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:50,080 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-11-09 16:20:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:50,258 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:50,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:50,259 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:50,259 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:50,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:20:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-09 16:20:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-09 16:20:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-09 16:20:50,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-11-09 16:20:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:50,268 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-09 16:20:50,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-09 16:20:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:50,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:50,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:50,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:50,470 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-11-09 16:20:50,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:50,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175907582] [2020-11-09 16:20:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175907582] [2020-11-09 16:20:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492719318] [2020-11-09 16:20:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:50,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:50,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:50,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:50,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1719415511] [2020-11-09 16:20:50,642 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:50,643 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:50,646 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-11-09 16:20:50,647 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:50,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:50,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:50,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:50,672 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-11-09 16:20:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:50,922 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:50,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 16:20:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:50,924 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:50,924 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:50,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:20:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 16:20:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 16:20:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 16:20:50,930 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 16:20:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:50,930 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 16:20:50,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 16:20:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:50,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:50,931 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:51,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:51,144 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-11-09 16:20:51,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:51,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485949781] [2020-11-09 16:20:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485949781] [2020-11-09 16:20:51,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167128063] [2020-11-09 16:20:51,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:51,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 16:20:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:51,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:51,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:51,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [625886838] [2020-11-09 16:20:51,387 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:51,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:51,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-11-09 16:20:51,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:51,416 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:51,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:51,418 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 16:20:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:51,627 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 16:20:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:51,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-09 16:20:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:51,629 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:51,629 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:51,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 16:20:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:20:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 16:20:51,636 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 16:20:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:51,637 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 16:20:51,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 16:20:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:51,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:51,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:51,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:51,853 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-11-09 16:20:51,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:51,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215296808] [2020-11-09 16:20:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215296808] [2020-11-09 16:20:51,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24576299] [2020-11-09 16:20:51,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:52,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:52,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:52,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:52,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 16:20:52,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1892870391] [2020-11-09 16:20:52,056 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:52,058 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:52,061 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-11-09 16:20:52,062 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:52,068 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:52,069 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:52,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:52,089 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:52,103 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:52,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:52,114 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:20:52,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:52,116 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-11-09 16:20:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:52,353 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 16:20:52,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:52,355 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:52,355 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 16:20:52,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 16:20:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-09 16:20:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 16:20:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-11-09 16:20:52,360 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-11-09 16:20:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:52,361 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-11-09 16:20:52,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-11-09 16:20:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:52,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:52,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:52,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 16:20:52,563 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-11-09 16:20:52,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:52,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499068093] [2020-11-09 16:20:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499068093] [2020-11-09 16:20:52,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900195832] [2020-11-09 16:20:52,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:52,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 16:20:52,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:52,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:52,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [803185787] [2020-11-09 16:20:52,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:52,836 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:52,839 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-11-09 16:20:52,839 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:52,846 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:52,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:52,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:52,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:52,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:52,848 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-11-09 16:20:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:53,138 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-11-09 16:20:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:53,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 16:20:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:53,140 INFO L225 Difference]: With dead ends: 74 [2020-11-09 16:20:53,141 INFO L226 Difference]: Without dead ends: 69 [2020-11-09 16:20:53,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:20:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-09 16:20:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-11-09 16:20:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 16:20:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-11-09 16:20:53,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-11-09 16:20:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:53,153 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-11-09 16:20:53,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-11-09 16:20:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:53,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:53,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:53,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:53,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-11-09 16:20:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373208810] [2020-11-09 16:20:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373208810] [2020-11-09 16:20:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255731552] [2020-11-09 16:20:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:53,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 16:20:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:53,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:53,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [516115857] [2020-11-09 16:20:53,615 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:53,616 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:53,620 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-11-09 16:20:53,620 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:53,648 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:20:53,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:53,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:53,650 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-11-09 16:20:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:53,959 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:53,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:53,962 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:53,962 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:53,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-09 16:20:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 16:20:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-11-09 16:20:53,976 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-11-09 16:20:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:53,976 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-11-09 16:20:53,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-11-09 16:20:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:53,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:53,977 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:54,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:54,192 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-11-09 16:20:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:54,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750381782] [2020-11-09 16:20:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750381782] [2020-11-09 16:20:54,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667007807] [2020-11-09 16:20:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:54,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:54,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:54,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1588424669] [2020-11-09 16:20:54,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:54,390 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:54,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-11-09 16:20:54,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:54,418 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:54,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:54,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:54,420 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-11-09 16:20:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:54,766 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:20:54,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 16:20:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:54,768 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:54,768 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:54,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:20:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 16:20:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 16:20:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 16:20:54,772 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 16:20:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:54,773 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 16:20:54,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 16:20:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:54,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:54,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:54,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 16:20:54,985 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-11-09 16:20:54,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:54,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036082618] [2020-11-09 16:20:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036082618] [2020-11-09 16:20:55,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452169374] [2020-11-09 16:20:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:55,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:55,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:55,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:55,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1392274546] [2020-11-09 16:20:55,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:55,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:55,215 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-11-09 16:20:55,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:55,235 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:55,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:55,236 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 16:20:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:55,512 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 16:20:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:55,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-09 16:20:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:55,514 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:55,514 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 16:20:55,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:20:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 16:20:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 16:20:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 16:20:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 16:20:55,522 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 16:20:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:55,523 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 16:20:55,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 16:20:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:55,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:55,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:55,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 16:20:55,724 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-11-09 16:20:55,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:55,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219238742] [2020-11-09 16:20:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219238742] [2020-11-09 16:20:55,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533535468] [2020-11-09 16:20:55,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:55,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 16:20:55,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:55,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:55,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 16:20:55,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [875972741] [2020-11-09 16:20:55,942 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:55,947 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:55,952 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-11-09 16:20:55,953 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:55,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:55,962 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:55,984 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:55,984 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:56,001 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:56,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:56,016 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:20:56,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:56,017 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-11-09 16:20:56,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:56,258 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 16:20:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:56,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:20:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:56,259 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:56,260 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 16:20:56,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 16:20:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-09 16:20:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 16:20:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-11-09 16:20:56,263 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-11-09 16:20:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:56,264 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-11-09 16:20:56,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-11-09 16:20:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:56,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:56,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:56,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 16:20:56,466 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-11-09 16:20:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:56,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937084157] [2020-11-09 16:20:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937084157] [2020-11-09 16:20:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932199101] [2020-11-09 16:20:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:56,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:56,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:20:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:56,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:56,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:20:56,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [51985669] [2020-11-09 16:20:56,703 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:56,704 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:56,707 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-11-09 16:20:56,707 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:56,720 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:56,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:56,722 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-11-09 16:20:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:57,110 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-11-09 16:20:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:20:57,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 16:20:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:57,112 INFO L225 Difference]: With dead ends: 84 [2020-11-09 16:20:57,112 INFO L226 Difference]: Without dead ends: 79 [2020-11-09 16:20:57,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:20:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-09 16:20:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-11-09 16:20:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 16:20:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-11-09 16:20:57,116 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-11-09 16:20:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:57,116 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-11-09 16:20:57,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-11-09 16:20:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:57,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:57,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:57,327 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-11-09 16:20:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:57,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874881777] [2020-11-09 16:20:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:57,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874881777] [2020-11-09 16:20:57,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197980341] [2020-11-09 16:20:57,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:57,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 16:20:57,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:20:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:57,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:57,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:57,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:20:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [27299371] [2020-11-09 16:20:57,546 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:57,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:57,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-11-09 16:20:57,551 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:57,584 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:57,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:57,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:20:57,585 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-11-09 16:20:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:58,005 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:20:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:20:58,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:20:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:58,007 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:20:58,007 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:20:58,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:20:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:20:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-11-09 16:20:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-09 16:20:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-11-09 16:20:58,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-11-09 16:20:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:58,013 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-11-09 16:20:58,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-11-09 16:20:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:20:58,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:58,014 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:58,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:58,226 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-11-09 16:20:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:58,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086398575] [2020-11-09 16:20:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086398575] [2020-11-09 16:20:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093652112] [2020-11-09 16:20:58,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:58,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-09 16:20:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:58,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:58,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:58,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:58,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:20:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945341070] [2020-11-09 16:20:58,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:58,470 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:58,473 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-11-09 16:20:58,473 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:58,495 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:20:58,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 16:20:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 16:20:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:20:58,497 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-11-09 16:20:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:58,933 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:20:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:20:58,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 16:20:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:58,942 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:20:58,942 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:20:58,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:20:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:20:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 16:20:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:20:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 16:20:58,947 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 16:20:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:58,949 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 16:20:58,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 16:20:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 16:20:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:20:58,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:58,950 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:59,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:59,154 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-11-09 16:20:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:59,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780253287] [2020-11-09 16:20:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:59,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780253287] [2020-11-09 16:20:59,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028948041] [2020-11-09 16:20:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:59,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:59,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:59,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:20:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651076836] [2020-11-09 16:20:59,374 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:59,376 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:59,379 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-11-09 16:20:59,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:59,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:59,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:20:59,413 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 16:20:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:59,839 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 16:20:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:20:59,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-09 16:20:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:59,841 INFO L225 Difference]: With dead ends: 80 [2020-11-09 16:20:59,841 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 16:20:59,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:20:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 16:20:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 16:20:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 16:20:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 16:20:59,846 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 16:20:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:59,846 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 16:20:59,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 16:20:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:20:59,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:59,847 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:00,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 16:21:00,059 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-11-09 16:21:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:00,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603437804] [2020-11-09 16:21:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:00,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603437804] [2020-11-09 16:21:00,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934736740] [2020-11-09 16:21:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:00,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:00,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:00,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:00,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:00,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 16:21:00,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1368810084] [2020-11-09 16:21:00,308 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:00,310 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:00,314 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-11-09 16:21:00,314 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:00,320 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:00,320 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:00,348 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:00,348 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:00,364 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:00,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:00,376 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:00,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:00,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:21:00,377 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-11-09 16:21:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:00,667 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 16:21:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 16:21:00,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 16:21:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:00,669 INFO L225 Difference]: With dead ends: 80 [2020-11-09 16:21:00,669 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 16:21:00,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 16:21:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-11-09 16:21:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 16:21:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-09 16:21:00,674 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-11-09 16:21:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:00,674 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-09 16:21:00,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-09 16:21:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:21:00,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:00,675 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:00,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 16:21:00,887 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-11-09 16:21:00,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:00,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486020310] [2020-11-09 16:21:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:01,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486020310] [2020-11-09 16:21:01,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984441425] [2020-11-09 16:21:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 16:21:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 16:21:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:01,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:01,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:01,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 16:21:01,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1047964765] [2020-11-09 16:21:01,127 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:01,129 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:01,133 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-11-09 16:21:01,133 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:01,140 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:01,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 16:21:01,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 16:21:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:21:01,141 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-11-09 16:21:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:01,618 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-11-09 16:21:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 16:21:01,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 16:21:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:01,619 INFO L225 Difference]: With dead ends: 94 [2020-11-09 16:21:01,620 INFO L226 Difference]: Without dead ends: 89 [2020-11-09 16:21:01,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:21:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-09 16:21:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-11-09 16:21:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 16:21:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-11-09 16:21:01,623 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-11-09 16:21:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:01,624 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-11-09 16:21:01,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 16:21:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-11-09 16:21:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:21:01,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:01,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:01,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 16:21:01,834 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-11-09 16:21:01,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:01,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140645074] [2020-11-09 16:21:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140645074] [2020-11-09 16:21:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543604139] [2020-11-09 16:21:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:02,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:02,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 16:21:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:02,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:02,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:02,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 16:21:02,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276042009] [2020-11-09 16:21:02,083 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:02,086 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:02,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-11-09 16:21:02,089 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:02,120 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 16:21:02,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:21:02,121 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-11-09 16:21:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:02,580 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 16:21:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:21:02,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 16:21:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:02,582 INFO L225 Difference]: With dead ends: 102 [2020-11-09 16:21:02,582 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 16:21:02,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:21:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 16:21:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-11-09 16:21:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 16:21:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-11-09 16:21:02,587 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-11-09 16:21:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:02,588 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-11-09 16:21:02,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-11-09 16:21:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 16:21:02,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:02,588 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:02,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 16:21:02,799 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-11-09 16:21:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106827019] [2020-11-09 16:21:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106827019] [2020-11-09 16:21:02,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047032004] [2020-11-09 16:21:02,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:02,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-09 16:21:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:03,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:03,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:03,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 16:21:03,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [411631408] [2020-11-09 16:21:03,016 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:03,018 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:03,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-11-09 16:21:03,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:03,045 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:03,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 16:21:03,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 16:21:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:03,047 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-11-09 16:21:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:03,645 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 16:21:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:03,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 16:21:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:03,647 INFO L225 Difference]: With dead ends: 102 [2020-11-09 16:21:03,647 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 16:21:03,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:21:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 16:21:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 16:21:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 16:21:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 16:21:03,651 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 16:21:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:03,652 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 16:21:03,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 16:21:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 16:21:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 16:21:03,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:03,652 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:03,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 16:21:03,863 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-11-09 16:21:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:03,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916374901] [2020-11-09 16:21:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916374901] [2020-11-09 16:21:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928700324] [2020-11-09 16:21:04,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:04,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 16:21:04,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:04,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:04,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:04,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 16:21:04,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1552965579] [2020-11-09 16:21:04,114 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:04,116 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:04,120 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-11-09 16:21:04,120 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:04,133 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:04,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:04,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:21:04,134 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 16:21:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:04,679 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 16:21:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 16:21:04,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-11-09 16:21:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:04,680 INFO L225 Difference]: With dead ends: 88 [2020-11-09 16:21:04,680 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:21:04,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:21:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:21:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 16:21:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 16:21:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 16:21:04,684 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 16:21:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:04,684 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 16:21:04,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 16:21:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:04,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:04,687 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:04,890 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-11-09 16:21:04,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:04,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437240233] [2020-11-09 16:21:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437240233] [2020-11-09 16:21:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185922763] [2020-11-09 16:21:05,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:05,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:05,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:05,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 16:21:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930951412] [2020-11-09 16:21:05,150 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:05,153 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:05,157 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-11-09 16:21:05,157 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:05,158 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:05,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:05,199 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:05,199 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:05,216 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:05,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:05,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:05,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:05,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:05,231 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-11-09 16:21:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:05,560 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 16:21:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:21:05,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 16:21:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:05,564 INFO L225 Difference]: With dead ends: 88 [2020-11-09 16:21:05,564 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 16:21:05,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:21:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 16:21:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-11-09 16:21:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 16:21:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-11-09 16:21:05,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-11-09 16:21:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:05,568 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-11-09 16:21:05,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-11-09 16:21:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:05,569 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:05,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-09 16:21:05,778 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-11-09 16:21:05,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:05,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612390396] [2020-11-09 16:21:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:05,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612390396] [2020-11-09 16:21:05,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120636663] [2020-11-09 16:21:05,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:05,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 16:21:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:06,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:06,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:06,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 16:21:06,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [967951994] [2020-11-09 16:21:06,024 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:06,026 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:06,030 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-11-09 16:21:06,030 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:06,042 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:06,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 16:21:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 16:21:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:06,043 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-11-09 16:21:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:06,687 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-11-09 16:21:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 16:21:06,688 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 16:21:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:06,689 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:06,689 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 16:21:06,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:21:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 16:21:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-11-09 16:21:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 16:21:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-11-09 16:21:06,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-11-09 16:21:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:06,693 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-11-09 16:21:06,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 16:21:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-11-09 16:21:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:06,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:06,693 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:06,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:06,901 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-11-09 16:21:06,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:06,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375530432] [2020-11-09 16:21:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:07,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375530432] [2020-11-09 16:21:07,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664615097] [2020-11-09 16:21:07,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:07,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 16:21:07,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:07,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:07,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:07,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 16:21:07,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [216714724] [2020-11-09 16:21:07,153 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:07,156 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:07,160 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-11-09 16:21:07,161 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:07,190 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:07,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:21:07,191 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-11-09 16:21:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:07,845 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 16:21:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:07,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 16:21:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:07,847 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:07,848 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 16:21:07,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:21:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 16:21:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-11-09 16:21:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-09 16:21:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-11-09 16:21:07,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-11-09 16:21:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:07,853 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-11-09 16:21:07,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-11-09 16:21:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 16:21:07,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:07,854 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:08,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 16:21:08,065 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-11-09 16:21:08,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:08,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183425759] [2020-11-09 16:21:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183425759] [2020-11-09 16:21:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361027215] [2020-11-09 16:21:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:08,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:08,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:08,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:08,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:08,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 16:21:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1849693905] [2020-11-09 16:21:08,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:08,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:08,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-11-09 16:21:08,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:08,357 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 16:21:08,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 16:21:08,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 16:21:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:08,359 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-11-09 16:21:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:09,099 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 16:21:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:21:09,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 16:21:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:09,101 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:09,102 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 16:21:09,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 16:21:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 16:21:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 16:21:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 16:21:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 16:21:09,106 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 16:21:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:09,106 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 16:21:09,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 16:21:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 16:21:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 16:21:09,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:09,107 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:09,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:09,318 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-11-09 16:21:09,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:09,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111502482] [2020-11-09 16:21:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:09,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111502482] [2020-11-09 16:21:09,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857422550] [2020-11-09 16:21:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:09,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 16:21:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:09,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:09,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:09,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 16:21:09,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [296100973] [2020-11-09 16:21:09,571 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:09,574 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:09,578 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-11-09 16:21:09,578 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:09,598 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:09,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:21:09,599 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 16:21:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:10,324 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 16:21:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 16:21:10,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-11-09 16:21:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:10,326 INFO L225 Difference]: With dead ends: 96 [2020-11-09 16:21:10,326 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 16:21:10,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:21:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 16:21:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 16:21:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 16:21:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 16:21:10,331 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 16:21:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:10,332 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 16:21:10,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 16:21:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:10,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:10,333 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:10,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-09 16:21:10,544 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-11-09 16:21:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:10,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961146166] [2020-11-09 16:21:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:10,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961146166] [2020-11-09 16:21:10,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008825722] [2020-11-09 16:21:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:10,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 16:21:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 16:21:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:10,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:10,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:10,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 16:21:10,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [791377734] [2020-11-09 16:21:10,864 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:10,867 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:10,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-11-09 16:21:10,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:10,874 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:10,874 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:10,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:10,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:10,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:10,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:10,965 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:10,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:10,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:10,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:10,967 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-11-09 16:21:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:11,399 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 16:21:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 16:21:11,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 16:21:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:11,401 INFO L225 Difference]: With dead ends: 96 [2020-11-09 16:21:11,402 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 16:21:11,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:21:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 16:21:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-09 16:21:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 16:21:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-11-09 16:21:11,406 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-11-09 16:21:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:11,407 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-11-09 16:21:11,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-11-09 16:21:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:11,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:11,408 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:11,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:11,619 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-11-09 16:21:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:11,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490441703] [2020-11-09 16:21:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:11,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490441703] [2020-11-09 16:21:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705532059] [2020-11-09 16:21:11,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 16:21:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:11,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:11,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:11,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 16:21:11,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [865748453] [2020-11-09 16:21:11,890 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:11,893 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:11,898 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-11-09 16:21:11,898 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:11,905 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:11,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 16:21:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 16:21:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:11,906 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-11-09 16:21:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:12,667 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-11-09 16:21:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 16:21:12,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 16:21:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:12,669 INFO L225 Difference]: With dead ends: 114 [2020-11-09 16:21:12,669 INFO L226 Difference]: Without dead ends: 109 [2020-11-09 16:21:12,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 16:21:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-09 16:21:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-09 16:21:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-09 16:21:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-11-09 16:21:12,673 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-11-09 16:21:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:12,673 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-11-09 16:21:12,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 16:21:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-11-09 16:21:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:12,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:12,674 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:12,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-09 16:21:12,885 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-11-09 16:21:12,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:12,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823075664] [2020-11-09 16:21:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:13,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823075664] [2020-11-09 16:21:13,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581647051] [2020-11-09 16:21:13,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 16:21:13,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:13,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:13,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:13,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 16:21:13,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245773640] [2020-11-09 16:21:13,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:13,143 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:13,148 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-11-09 16:21:13,148 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:13,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:13,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:13,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:13,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:13,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-11-09 16:21:13,194 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-11-09 16:21:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:13,992 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 16:21:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:21:13,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 16:21:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:13,993 INFO L225 Difference]: With dead ends: 122 [2020-11-09 16:21:13,993 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 16:21:13,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 16:21:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 16:21:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-11-09 16:21:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 16:21:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-11-09 16:21:13,998 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-11-09 16:21:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:13,998 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-11-09 16:21:13,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-11-09 16:21:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 16:21:13,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:13,999 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:14,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:14,200 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-11-09 16:21:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:14,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910014874] [2020-11-09 16:21:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:14,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910014874] [2020-11-09 16:21:14,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498746892] [2020-11-09 16:21:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:14,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-09 16:21:14,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:14,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:14,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:14,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:14,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 16:21:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881952769] [2020-11-09 16:21:14,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:14,506 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:14,512 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-11-09 16:21:14,512 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:14,534 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:14,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 16:21:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 16:21:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:14,536 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-11-09 16:21:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:15,437 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 16:21:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:21:15,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 16:21:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:15,439 INFO L225 Difference]: With dead ends: 122 [2020-11-09 16:21:15,439 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 16:21:15,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 16:21:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 16:21:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 16:21:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 16:21:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 16:21:15,443 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 16:21:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:15,443 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 16:21:15,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 16:21:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 16:21:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 16:21:15,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:15,444 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:15,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-09 16:21:15,653 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:15,654 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-11-09 16:21:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:15,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562997563] [2020-11-09 16:21:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562997563] [2020-11-09 16:21:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297307848] [2020-11-09 16:21:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:15,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 16:21:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:15,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:15,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:15,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 16:21:15,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101156782] [2020-11-09 16:21:15,944 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:15,947 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:15,952 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-11-09 16:21:15,953 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:15,970 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:15,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:15,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 16:21:15,972 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 16:21:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:16,826 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 16:21:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 16:21:16,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-11-09 16:21:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:16,829 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:16,829 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 16:21:16,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 16:21:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 16:21:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 16:21:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 16:21:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 16:21:16,833 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 16:21:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:16,834 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 16:21:16,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 16:21:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:16,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:16,834 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:17,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 16:21:17,046 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-11-09 16:21:17,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:17,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633609175] [2020-11-09 16:21:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:17,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633609175] [2020-11-09 16:21:17,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887004655] [2020-11-09 16:21:17,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:17,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 16:21:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 16:21:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:17,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:17,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:17,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 16:21:17,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1979926440] [2020-11-09 16:21:17,393 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:17,396 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:17,402 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-11-09 16:21:17,403 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:17,404 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:17,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:17,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:17,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:17,461 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:17,461 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:17,476 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:17,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:17,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:17,477 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-11-09 16:21:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:17,952 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 16:21:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:21:17,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 16:21:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:17,954 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:17,954 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 16:21:17,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:21:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 16:21:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-09 16:21:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 16:21:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-11-09 16:21:17,959 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-11-09 16:21:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:17,960 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-11-09 16:21:17,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-11-09 16:21:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:17,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:17,960 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:18,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 16:21:18,171 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-11-09 16:21:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:18,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729853120] [2020-11-09 16:21:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:18,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729853120] [2020-11-09 16:21:18,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866944658] [2020-11-09 16:21:18,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:18,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 16:21:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:18,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:18,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:18,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 16:21:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383393381] [2020-11-09 16:21:18,455 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:18,458 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:18,463 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-11-09 16:21:18,464 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:18,470 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:18,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 16:21:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 16:21:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:18,472 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-11-09 16:21:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:19,387 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-11-09 16:21:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 16:21:19,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 16:21:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:19,392 INFO L225 Difference]: With dead ends: 124 [2020-11-09 16:21:19,392 INFO L226 Difference]: Without dead ends: 119 [2020-11-09 16:21:19,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 16:21:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-09 16:21:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-11-09 16:21:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 16:21:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-11-09 16:21:19,396 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-11-09 16:21:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:19,396 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-11-09 16:21:19,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 16:21:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-11-09 16:21:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:19,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:19,397 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:19,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 16:21:19,607 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-11-09 16:21:19,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:19,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096693129] [2020-11-09 16:21:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:19,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096693129] [2020-11-09 16:21:19,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296812110] [2020-11-09 16:21:19,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:19,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:19,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:19,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:19,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 16:21:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1632583462] [2020-11-09 16:21:19,916 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:19,919 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:19,926 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-11-09 16:21:19,926 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:19,956 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:19,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:21:19,957 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-11-09 16:21:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:20,907 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 16:21:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:21:20,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 16:21:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:20,909 INFO L225 Difference]: With dead ends: 132 [2020-11-09 16:21:20,910 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:20,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 16:21:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-11-09 16:21:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-09 16:21:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-11-09 16:21:20,915 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-11-09 16:21:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:20,915 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-11-09 16:21:20,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-11-09 16:21:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 16:21:20,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:20,916 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:21,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 16:21:21,128 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-11-09 16:21:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135672258] [2020-11-09 16:21:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:21,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135672258] [2020-11-09 16:21:21,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130370316] [2020-11-09 16:21:21,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 16:21:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:21,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:21,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:21,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 16:21:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1715585001] [2020-11-09 16:21:21,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:21,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:21,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-11-09 16:21:21,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:21,487 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:21,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 16:21:21,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 16:21:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:21,488 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-11-09 16:21:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:22,510 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 16:21:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:21:22,511 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 16:21:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:22,512 INFO L225 Difference]: With dead ends: 132 [2020-11-09 16:21:22,512 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:22,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-11-09 16:21:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 16:21:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 16:21:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 16:21:22,516 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 16:21:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:22,516 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 16:21:22,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 16:21:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 16:21:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 16:21:22,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:22,517 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:22,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 16:21:22,726 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-11-09 16:21:22,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:22,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378603793] [2020-11-09 16:21:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:22,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378603793] [2020-11-09 16:21:22,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124414962] [2020-11-09 16:21:22,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:22,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 16:21:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 16:21:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:23,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:23,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:23,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 16:21:23,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1020565941] [2020-11-09 16:21:23,050 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:23,054 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:23,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-11-09 16:21:23,060 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:23,070 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:23,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:23,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:21:23,072 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 16:21:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:24,082 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 16:21:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 16:21:24,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-11-09 16:21:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:24,084 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:24,084 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 16:21:24,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 16:21:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 16:21:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 16:21:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 16:21:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 16:21:24,089 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 16:21:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:24,089 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 16:21:24,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 16:21:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:24,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:24,090 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:24,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 16:21:24,291 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-11-09 16:21:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758304840] [2020-11-09 16:21:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:24,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758304840] [2020-11-09 16:21:24,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848122604] [2020-11-09 16:21:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:24,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:24,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:24,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 16:21:24,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [248877314] [2020-11-09 16:21:24,676 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:24,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:24,687 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-11-09 16:21:24,687 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:24,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:24,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:24,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:24,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:24,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:24,742 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:24,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:24,771 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-11-09 16:21:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:25,279 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 16:21:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 16:21:25,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 16:21:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:25,281 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:25,281 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 16:21:25,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:21:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 16:21:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-11-09 16:21:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 16:21:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-11-09 16:21:25,284 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-11-09 16:21:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:25,285 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-11-09 16:21:25,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-11-09 16:21:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:25,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:25,286 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:25,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:25,495 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:25,495 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-11-09 16:21:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:25,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481019774] [2020-11-09 16:21:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481019774] [2020-11-09 16:21:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130369039] [2020-11-09 16:21:25,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:25,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 16:21:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 16:21:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:25,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:25,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:25,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 16:21:25,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1121439039] [2020-11-09 16:21:25,854 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:25,858 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:25,865 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-11-09 16:21:25,865 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:25,871 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:25,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 16:21:25,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 16:21:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:25,873 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-11-09 16:21:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:26,984 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-11-09 16:21:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 16:21:26,985 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 16:21:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:26,986 INFO L225 Difference]: With dead ends: 134 [2020-11-09 16:21:26,987 INFO L226 Difference]: Without dead ends: 129 [2020-11-09 16:21:26,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 16:21:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-09 16:21:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-11-09 16:21:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 16:21:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-11-09 16:21:26,993 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-11-09 16:21:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:26,993 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-11-09 16:21:26,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 16:21:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-11-09 16:21:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:26,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:26,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:27,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:27,195 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:27,196 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-11-09 16:21:27,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:27,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684423258] [2020-11-09 16:21:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684423258] [2020-11-09 16:21:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744888699] [2020-11-09 16:21:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:27,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 16:21:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 16:21:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:27,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:27,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 16:21:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1702899893] [2020-11-09 16:21:27,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:27,507 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:27,514 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-11-09 16:21:27,514 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:27,548 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:27,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:21:27,549 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-11-09 16:21:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:28,600 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 16:21:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:21:28,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 16:21:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:28,602 INFO L225 Difference]: With dead ends: 142 [2020-11-09 16:21:28,602 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 16:21:28,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 16:21:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 16:21:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-11-09 16:21:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 16:21:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-11-09 16:21:28,607 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-11-09 16:21:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:28,607 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-11-09 16:21:28,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-11-09 16:21:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 16:21:28,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:28,608 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:28,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:28,818 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:28,819 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-11-09 16:21:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:28,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266548921] [2020-11-09 16:21:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266548921] [2020-11-09 16:21:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335266213] [2020-11-09 16:21:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:29,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:29,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:29,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 16:21:29,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710012531] [2020-11-09 16:21:29,168 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:29,172 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:29,179 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-11-09 16:21:29,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:29,204 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:29,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 16:21:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:29,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 16:21:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:29,208 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-11-09 16:21:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:30,458 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 16:21:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:21:30,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 16:21:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:30,460 INFO L225 Difference]: With dead ends: 142 [2020-11-09 16:21:30,460 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 16:21:30,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-11-09 16:21:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 16:21:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 16:21:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 16:21:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 16:21:30,464 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 16:21:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:30,464 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 16:21:30,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 16:21:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 16:21:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 16:21:30,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:30,465 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:30,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-09 16:21:30,674 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-11-09 16:21:30,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:30,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787217074] [2020-11-09 16:21:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787217074] [2020-11-09 16:21:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756549327] [2020-11-09 16:21:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:30,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:31,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:31,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:31,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 16:21:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [386884377] [2020-11-09 16:21:31,048 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:31,052 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:31,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-11-09 16:21:31,060 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:31,073 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:31,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:21:31,074 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 16:21:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:32,282 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 16:21:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 16:21:32,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-11-09 16:21:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:32,284 INFO L225 Difference]: With dead ends: 120 [2020-11-09 16:21:32,284 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 16:21:32,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 16:21:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 16:21:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 16:21:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 16:21:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 16:21:32,289 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 16:21:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:32,289 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 16:21:32,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 16:21:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:32,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:32,290 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:32,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:32,501 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-11-09 16:21:32,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:32,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841220339] [2020-11-09 16:21:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841220339] [2020-11-09 16:21:32,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405721598] [2020-11-09 16:21:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:32,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 16:21:32,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 16:21:32,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:32,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:32,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:32,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 16:21:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335848009] [2020-11-09 16:21:32,941 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:32,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:32,953 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-11-09 16:21:32,954 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:32,960 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:32,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:32,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:32,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:33,027 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:33,027 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:33,047 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:33,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:33,048 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-11-09 16:21:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:33,714 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 16:21:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:33,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 16:21:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:33,716 INFO L225 Difference]: With dead ends: 120 [2020-11-09 16:21:33,716 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 16:21:33,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 16:21:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 16:21:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-11-09 16:21:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 16:21:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-11-09 16:21:33,720 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-11-09 16:21:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:33,720 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-11-09 16:21:33,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-11-09 16:21:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:33,720 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:33,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:33,921 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-11-09 16:21:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:33,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331174340] [2020-11-09 16:21:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:34,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331174340] [2020-11-09 16:21:34,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247317653] [2020-11-09 16:21:34,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:34,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:34,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 16:21:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:34,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:34,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:34,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 16:21:34,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [133826569] [2020-11-09 16:21:34,299 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:34,302 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:34,307 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-11-09 16:21:34,308 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:34,312 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:34,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 16:21:34,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 16:21:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:34,313 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-11-09 16:21:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:35,623 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-11-09 16:21:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 16:21:35,624 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 16:21:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:35,625 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:21:35,626 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 16:21:35,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 16:21:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 16:21:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-11-09 16:21:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-09 16:21:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-11-09 16:21:35,630 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-11-09 16:21:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:35,630 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-11-09 16:21:35,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 16:21:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-11-09 16:21:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:35,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:35,631 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:35,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 16:21:35,837 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-11-09 16:21:35,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:35,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860493308] [2020-11-09 16:21:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:36,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860493308] [2020-11-09 16:21:36,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883183331] [2020-11-09 16:21:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:36,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 16:21:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:36,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 16:21:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:36,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:36,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:36,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 16:21:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1239151229] [2020-11-09 16:21:36,230 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:36,234 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:36,240 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-11-09 16:21:36,241 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:36,273 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:36,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:36,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-11-09 16:21:36,274 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-11-09 16:21:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:37,656 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 16:21:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:21:37,656 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 16:21:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:37,658 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:21:37,658 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 16:21:37,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 16:21:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 16:21:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-11-09 16:21:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-09 16:21:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-11-09 16:21:37,663 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-11-09 16:21:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:37,663 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-11-09 16:21:37,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-11-09 16:21:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 16:21:37,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:37,664 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:37,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 16:21:37,876 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-11-09 16:21:37,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:37,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919150545] [2020-11-09 16:21:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919150545] [2020-11-09 16:21:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964089209] [2020-11-09 16:21:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:38,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 16:21:38,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 16:21:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:38,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:38,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:38,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 16:21:38,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1700608052] [2020-11-09 16:21:38,287 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:38,292 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:38,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-11-09 16:21:38,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:38,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:38,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 16:21:38,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 16:21:38,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:38,336 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-11-09 16:21:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:39,791 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 16:21:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 16:21:39,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 16:21:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:39,794 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:21:39,794 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 16:21:39,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-11-09 16:21:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 16:21:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 16:21:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 16:21:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 16:21:39,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 16:21:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:39,799 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 16:21:39,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 16:21:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 16:21:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 16:21:39,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:39,799 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:40,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 16:21:40,000 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-11-09 16:21:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:40,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855347721] [2020-11-09 16:21:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855347721] [2020-11-09 16:21:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735665620] [2020-11-09 16:21:40,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 16:21:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:40,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:40,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:40,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 16:21:40,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [306219724] [2020-11-09 16:21:40,415 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:40,419 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:40,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-11-09 16:21:40,425 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:40,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:40,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 16:21:40,440 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 16:21:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:41,875 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 16:21:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 16:21:41,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-11-09 16:21:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:41,877 INFO L225 Difference]: With dead ends: 128 [2020-11-09 16:21:41,877 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:41,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 16:21:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 16:21:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 16:21:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 16:21:41,882 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 16:21:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:41,882 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 16:21:41,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 16:21:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:41,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:41,883 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:42,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:42,093 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-11-09 16:21:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:42,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40514337] [2020-11-09 16:21:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:42,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40514337] [2020-11-09 16:21:42,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220877340] [2020-11-09 16:21:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:42,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:42,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:21:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:42,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:42,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:42,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 16:21:42,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [623810541] [2020-11-09 16:21:42,578 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:42,583 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:42,593 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-11-09 16:21:42,593 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:42,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:42,603 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:42,636 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:42,636 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:42,676 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:42,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:42,698 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:42,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:21:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:21:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:42,700 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-11-09 16:21:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:43,506 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 16:21:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 16:21:43,507 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 16:21:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:43,508 INFO L225 Difference]: With dead ends: 128 [2020-11-09 16:21:43,508 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 16:21:43,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 16:21:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 16:21:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-11-09 16:21:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 16:21:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-11-09 16:21:43,513 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-11-09 16:21:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:43,513 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-11-09 16:21:43,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:21:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-11-09 16:21:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:43,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:43,514 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:43,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:43,714 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-11-09 16:21:43,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:43,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243247458] [2020-11-09 16:21:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:44,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243247458] [2020-11-09 16:21:44,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938354911] [2020-11-09 16:21:44,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:44,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 16:21:44,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 16:21:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:44,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:44,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 16:21:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1256147374] [2020-11-09 16:21:44,176 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:44,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:44,190 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-11-09 16:21:44,190 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:44,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:44,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 16:21:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 16:21:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:44,196 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-11-09 16:21:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:45,727 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-11-09 16:21:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 16:21:45,732 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 16:21:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:45,733 INFO L225 Difference]: With dead ends: 154 [2020-11-09 16:21:45,733 INFO L226 Difference]: Without dead ends: 149 [2020-11-09 16:21:45,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 16:21:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-09 16:21:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-11-09 16:21:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 16:21:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-11-09 16:21:45,737 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-11-09 16:21:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:45,737 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-11-09 16:21:45,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 16:21:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-11-09 16:21:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:45,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:45,738 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:45,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-09 16:21:45,948 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-11-09 16:21:45,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:45,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326408941] [2020-11-09 16:21:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:46,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326408941] [2020-11-09 16:21:46,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884422375] [2020-11-09 16:21:46,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:46,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:46,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 16:21:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:46,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:46,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:46,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 16:21:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572738448] [2020-11-09 16:21:46,366 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:46,371 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:46,379 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-11-09 16:21:46,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:46,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 16:21:46,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:21:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:21:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:21:46,414 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-11-09 16:21:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:47,951 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 16:21:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 16:21:47,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 16:21:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:47,954 INFO L225 Difference]: With dead ends: 162 [2020-11-09 16:21:47,954 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 16:21:47,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 16:21:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 16:21:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-11-09 16:21:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 16:21:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-11-09 16:21:47,958 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-11-09 16:21:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:47,959 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-11-09 16:21:47,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:21:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-11-09 16:21:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 16:21:47,959 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:47,960 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:48,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:48,167 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:48,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-11-09 16:21:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:48,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714841062] [2020-11-09 16:21:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714841062] [2020-11-09 16:21:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230576844] [2020-11-09 16:21:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:48,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-09 16:21:48,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:21:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:48,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 16:21:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059662473] [2020-11-09 16:21:48,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:48,633 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:48,647 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-11-09 16:21:48,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:48,685 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:48,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 16:21:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 16:21:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:21:48,687 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-11-09 16:21:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:50,173 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 16:21:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 16:21:50,174 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 16:21:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:50,175 INFO L225 Difference]: With dead ends: 162 [2020-11-09 16:21:50,175 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 16:21:50,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-11-09 16:21:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 16:21:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 16:21:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 16:21:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 16:21:50,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 16:21:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:50,179 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 16:21:50,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 16:21:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 16:21:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 16:21:50,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:50,180 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:50,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-09 16:21:50,381 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-11-09 16:21:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992012710] [2020-11-09 16:21:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992012710] [2020-11-09 16:21:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560288944] [2020-11-09 16:21:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:50,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 16:21:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:21:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:50,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:50,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:50,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 16:21:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [124793961] [2020-11-09 16:21:50,816 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:50,821 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:50,830 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-11-09 16:21:50,830 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:50,846 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:50,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:21:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:21:50,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:21:50,848 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 16:21:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:52,463 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 16:21:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 16:21:52,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-11-09 16:21:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:52,465 INFO L225 Difference]: With dead ends: 136 [2020-11-09 16:21:52,465 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 16:21:52,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 16:21:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 16:21:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 16:21:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 16:21:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 16:21:52,470 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 16:21:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:52,470 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 16:21:52,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:21:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 16:21:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:21:52,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:52,471 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:52,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 16:21:52,681 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-11-09 16:21:52,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:52,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563770247] [2020-11-09 16:21:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:53,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563770247] [2020-11-09 16:21:53,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142303621] [2020-11-09 16:21:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:21:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:53,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:53,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:53,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 16:21:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1614337286] [2020-11-09 16:21:53,238 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:53,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:53,256 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-11-09 16:21:53,256 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:53,268 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:53,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:53,297 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:53,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:53,322 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:53,323 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:53,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:21:53,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:21:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:21:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:21:53,347 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-11-09 16:21:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:54,212 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 16:21:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:21:54,213 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 16:21:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:54,214 INFO L225 Difference]: With dead ends: 136 [2020-11-09 16:21:54,214 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 16:21:54,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 16:21:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 16:21:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-11-09 16:21:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 16:21:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-11-09 16:21:54,217 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-11-09 16:21:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:54,217 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-11-09 16:21:54,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:21:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-11-09 16:21:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:21:54,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:54,218 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:54,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 16:21:54,419 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-11-09 16:21:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:54,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172570215] [2020-11-09 16:21:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:54,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172570215] [2020-11-09 16:21:54,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947769934] [2020-11-09 16:21:54,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:54,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 16:21:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:54,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:54,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:54,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 16:21:54,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834173841] [2020-11-09 16:21:54,906 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:54,910 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:54,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-11-09 16:21:54,923 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:54,930 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 16:21:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 16:21:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:21:54,931 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-11-09 16:21:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:56,678 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-11-09 16:21:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 16:21:56,679 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 16:21:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:56,680 INFO L225 Difference]: With dead ends: 164 [2020-11-09 16:21:56,680 INFO L226 Difference]: Without dead ends: 159 [2020-11-09 16:21:56,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 16:21:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-09 16:21:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-11-09 16:21:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 16:21:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-11-09 16:21:56,684 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-11-09 16:21:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:56,685 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-11-09 16:21:56,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 16:21:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-11-09 16:21:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:21:56,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:56,685 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:56,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 16:21:56,894 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-11-09 16:21:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:56,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234902374] [2020-11-09 16:21:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234902374] [2020-11-09 16:21:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638836768] [2020-11-09 16:21:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:57,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 16:21:57,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:21:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:57,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:57,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 16:21:57,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [492934697] [2020-11-09 16:21:57,369 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:57,373 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:57,385 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-11-09 16:21:57,385 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:57,418 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:57,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:21:57,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:21:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:21:57,419 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-11-09 16:21:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:59,254 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 16:21:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 16:21:59,255 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 16:21:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:59,256 INFO L225 Difference]: With dead ends: 172 [2020-11-09 16:21:59,256 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:21:59,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-11-09 16:21:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:21:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-11-09 16:21:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-09 16:21:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-11-09 16:21:59,261 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-11-09 16:21:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:59,261 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-11-09 16:21:59,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:21:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-11-09 16:21:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 16:21:59,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:59,262 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:59,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:59,474 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:59,474 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-11-09 16:21:59,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:59,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267386809] [2020-11-09 16:21:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267386809] [2020-11-09 16:21:59,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603378479] [2020-11-09 16:21:59,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:59,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:21:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:59,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:00,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:00,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 16:22:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [921411290] [2020-11-09 16:22:00,007 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:00,011 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:00,023 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-11-09 16:22:00,023 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:00,056 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 16:22:00,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 16:22:00,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 16:22:00,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:00,057 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-11-09 16:22:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:01,988 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 16:22:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 16:22:01,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 16:22:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:01,990 INFO L225 Difference]: With dead ends: 172 [2020-11-09 16:22:01,991 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:22:01,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 16:22:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:22:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 16:22:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 16:22:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 16:22:01,994 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 16:22:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:01,994 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 16:22:01,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 16:22:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 16:22:01,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 16:22:01,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:01,995 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 16:22:02,196 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-11-09 16:22:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:02,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485115361] [2020-11-09 16:22:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:02,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485115361] [2020-11-09 16:22:02,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705585105] [2020-11-09 16:22:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:02,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 16:22:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:22:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:02,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:02,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:02,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 16:22:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [156306668] [2020-11-09 16:22:02,740 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:02,744 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:02,754 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-11-09 16:22:02,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:02,771 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:02,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:22:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:22:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:22:02,772 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 16:22:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:04,690 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 16:22:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 16:22:04,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-11-09 16:22:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:04,692 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:22:04,692 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 16:22:04,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 16:22:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 16:22:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 16:22:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 16:22:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 16:22:04,696 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 16:22:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:04,696 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 16:22:04,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:22:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 16:22:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:04,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:04,697 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:04,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:04,900 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-11-09 16:22:04,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:04,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728059716] [2020-11-09 16:22:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728059716] [2020-11-09 16:22:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789477715] [2020-11-09 16:22:05,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:05,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 16:22:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:05,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:05,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:05,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 16:22:05,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [350049373] [2020-11-09 16:22:05,561 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:05,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:05,575 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-11-09 16:22:05,575 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:05,578 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,578 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,617 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,617 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,659 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,683 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:22:05,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:05,684 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-11-09 16:22:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:06,653 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 16:22:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 16:22:06,653 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 16:22:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:06,654 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:22:06,654 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 16:22:06,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 16:22:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 16:22:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-11-09 16:22:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 16:22:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-11-09 16:22:06,658 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-11-09 16:22:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:06,659 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-11-09 16:22:06,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-11-09 16:22:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:06,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:06,660 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:06,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-09 16:22:06,870 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-11-09 16:22:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:06,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502201119] [2020-11-09 16:22:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502201119] [2020-11-09 16:22:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976055032] [2020-11-09 16:22:07,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 16:22:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:07,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:07,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:07,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 16:22:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [910168802] [2020-11-09 16:22:07,420 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:07,425 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:07,435 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-11-09 16:22:07,436 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:07,440 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:07,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 16:22:07,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 16:22:07,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:07,441 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-11-09 16:22:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:09,467 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-11-09 16:22:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 16:22:09,467 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 16:22:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:09,468 INFO L225 Difference]: With dead ends: 174 [2020-11-09 16:22:09,468 INFO L226 Difference]: Without dead ends: 169 [2020-11-09 16:22:09,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 16:22:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-09 16:22:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-11-09 16:22:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-09 16:22:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-11-09 16:22:09,472 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-11-09 16:22:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:09,472 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-11-09 16:22:09,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 16:22:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-11-09 16:22:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:09,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:09,475 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:09,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:09,677 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-11-09 16:22:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:09,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347657376] [2020-11-09 16:22:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347657376] [2020-11-09 16:22:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151725668] [2020-11-09 16:22:10,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:10,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:10,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:10,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:10,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 16:22:10,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1106716188] [2020-11-09 16:22:10,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:10,271 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:10,280 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-11-09 16:22:10,281 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:10,319 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:10,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:10,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-11-09 16:22:10,321 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-11-09 16:22:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:12,437 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 16:22:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 16:22:12,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 16:22:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:12,440 INFO L225 Difference]: With dead ends: 182 [2020-11-09 16:22:12,440 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 16:22:12,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 16:22:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 16:22:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-11-09 16:22:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 16:22:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-11-09 16:22:12,444 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-11-09 16:22:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:12,444 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-11-09 16:22:12,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-11-09 16:22:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 16:22:12,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:12,445 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:12,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-09 16:22:12,648 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-11-09 16:22:12,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:12,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612481776] [2020-11-09 16:22:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612481776] [2020-11-09 16:22:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414425564] [2020-11-09 16:22:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:13,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-09 16:22:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:13,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:13,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 16:22:13,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1060829097] [2020-11-09 16:22:13,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:13,267 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:13,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-11-09 16:22:13,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:13,317 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:13,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 16:22:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 16:22:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:13,319 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-11-09 16:22:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:15,535 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 16:22:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 16:22:15,536 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 16:22:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:15,538 INFO L225 Difference]: With dead ends: 182 [2020-11-09 16:22:15,538 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 16:22:15,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-11-09 16:22:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 16:22:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 16:22:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 16:22:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 16:22:15,541 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 16:22:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:15,541 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 16:22:15,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 16:22:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 16:22:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 16:22:15,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:15,542 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:15,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:15,753 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-11-09 16:22:15,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406644656] [2020-11-09 16:22:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:16,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406644656] [2020-11-09 16:22:16,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452012039] [2020-11-09 16:22:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:16,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:16,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 16:22:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [446189102] [2020-11-09 16:22:16,373 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:16,378 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:16,388 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-11-09 16:22:16,388 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:16,398 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:16,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:16,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:16,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 16:22:16,399 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 16:22:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:18,637 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 16:22:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 16:22:18,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-11-09 16:22:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:18,639 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:22:18,639 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 16:22:18,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 16:22:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 16:22:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 16:22:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 16:22:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 16:22:18,642 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 16:22:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 16:22:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 16:22:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:18,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:18,643 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-09 16:22:18,844 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-11-09 16:22:18,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:18,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086410315] [2020-11-09 16:22:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086410315] [2020-11-09 16:22:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047158799] [2020-11-09 16:22:19,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:19,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 16:22:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 16:22:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:19,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:19,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:19,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 16:22:19,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1964625418] [2020-11-09 16:22:19,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:19,625 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:19,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-11-09 16:22:19,636 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:19,641 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:19,641 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:19,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:19,682 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:19,722 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:19,723 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:19,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:22:19,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:19,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:19,771 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-11-09 16:22:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:20,946 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 16:22:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:22:20,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 16:22:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:20,948 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:22:20,948 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 16:22:20,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 16:22:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 16:22:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-11-09 16:22:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 16:22:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-11-09 16:22:20,951 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-11-09 16:22:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:20,951 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-11-09 16:22:20,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-11-09 16:22:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:20,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:20,952 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:21,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:21,160 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-11-09 16:22:21,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:21,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286153795] [2020-11-09 16:22:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286153795] [2020-11-09 16:22:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420969523] [2020-11-09 16:22:21,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:21,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 16:22:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:21,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:21,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:21,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 16:22:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1744813925] [2020-11-09 16:22:21,959 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:21,965 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:21,984 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-11-09 16:22:21,985 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:21,993 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:21,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 16:22:21,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:21,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 16:22:21,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:21,995 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-11-09 16:22:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:24,344 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-11-09 16:22:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 16:22:24,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 16:22:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:24,347 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:22:24,347 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 16:22:24,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 16:22:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 16:22:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-11-09 16:22:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 16:22:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-11-09 16:22:24,351 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-11-09 16:22:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:24,351 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-11-09 16:22:24,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 16:22:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-11-09 16:22:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:24,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:24,352 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:24,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-09 16:22:24,553 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-11-09 16:22:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:24,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027944271] [2020-11-09 16:22:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:25,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027944271] [2020-11-09 16:22:25,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872591557] [2020-11-09 16:22:25,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:25,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:25,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:25,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 16:22:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [421937084] [2020-11-09 16:22:25,162 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:25,165 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:25,175 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-11-09 16:22:25,176 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:25,217 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:25,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:22:25,219 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-11-09 16:22:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:27,612 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 16:22:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 16:22:27,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 16:22:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:27,615 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:22:27,615 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 16:22:27,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-11-09 16:22:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 16:22:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-11-09 16:22:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-09 16:22:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-11-09 16:22:27,618 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-11-09 16:22:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:27,618 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-11-09 16:22:27,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-11-09 16:22:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 16:22:27,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:27,619 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:27,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 16:22:27,820 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:27,820 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-11-09 16:22:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183265523] [2020-11-09 16:22:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:28,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183265523] [2020-11-09 16:22:28,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4484266] [2020-11-09 16:22:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:28,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 16:22:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:28,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:28,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 16:22:28,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489883333] [2020-11-09 16:22:28,514 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:28,518 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:28,532 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-11-09 16:22:28,533 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:28,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:28,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 16:22:28,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:28,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 16:22:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:28,571 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-11-09 16:22:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:30,981 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 16:22:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 16:22:30,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 16:22:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:30,983 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:22:30,983 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 16:22:30,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-11-09 16:22:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 16:22:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 16:22:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 16:22:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 16:22:30,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 16:22:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:30,987 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 16:22:30,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 16:22:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 16:22:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 16:22:30,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:30,988 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:31,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 16:22:31,195 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-11-09 16:22:31,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:31,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022424997] [2020-11-09 16:22:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022424997] [2020-11-09 16:22:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783313348] [2020-11-09 16:22:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 16:22:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 16:22:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:31,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:31,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:31,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 16:22:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1861908628] [2020-11-09 16:22:31,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:31,909 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:31,920 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-11-09 16:22:31,920 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:31,935 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:31,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:31,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:22:31,936 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 16:22:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:34,453 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 16:22:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 16:22:34,454 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-11-09 16:22:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:34,455 INFO L225 Difference]: With dead ends: 160 [2020-11-09 16:22:34,455 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 16:22:34,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 16:22:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 16:22:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 16:22:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 16:22:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 16:22:34,460 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 16:22:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:34,460 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 16:22:34,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 16:22:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:22:34,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:34,461 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:34,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:34,669 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-11-09 16:22:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345250938] [2020-11-09 16:22:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345250938] [2020-11-09 16:22:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673178165] [2020-11-09 16:22:35,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:35,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:22:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:35,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:35,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:35,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 16:22:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [622891995] [2020-11-09 16:22:35,540 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:35,544 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:35,557 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-11-09 16:22:35,557 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:35,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:35,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:35,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:35,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:35,635 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:35,635 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:35,668 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:22:35,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:22:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:22:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:35,669 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-11-09 16:22:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:37,007 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 16:22:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 16:22:37,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 16:22:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:37,009 INFO L225 Difference]: With dead ends: 160 [2020-11-09 16:22:37,009 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 16:22:37,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 16:22:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 16:22:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-11-09 16:22:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 16:22:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-11-09 16:22:37,014 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-11-09 16:22:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:37,014 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-11-09 16:22:37,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:22:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-11-09 16:22:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:22:37,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:37,015 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:37,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:37,225 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-11-09 16:22:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:37,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35729077] [2020-11-09 16:22:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:37,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35729077] [2020-11-09 16:22:37,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12928574] [2020-11-09 16:22:37,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:37,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 16:22:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 16:22:37,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:37,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:37,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:37,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 16:22:37,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [949757091] [2020-11-09 16:22:37,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:37,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:37,990 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-11-09 16:22:37,990 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:38,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:38,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 16:22:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 16:22:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:38,002 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-11-09 16:22:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:40,533 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-11-09 16:22:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 16:22:40,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 16:22:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:40,534 INFO L225 Difference]: With dead ends: 194 [2020-11-09 16:22:40,534 INFO L226 Difference]: Without dead ends: 189 [2020-11-09 16:22:40,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 16:22:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-09 16:22:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-11-09 16:22:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 16:22:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-11-09 16:22:40,542 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-11-09 16:22:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:40,542 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-11-09 16:22:40,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 16:22:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-11-09 16:22:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:22:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:40,544 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:40,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:40,753 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-11-09 16:22:40,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:40,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438438380] [2020-11-09 16:22:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:41,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438438380] [2020-11-09 16:22:41,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783374676] [2020-11-09 16:22:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:41,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 16:22:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:41,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 16:22:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:41,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:41,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:41,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 16:22:41,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [140152259] [2020-11-09 16:22:41,498 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:41,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:41,520 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-11-09 16:22:41,520 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:41,562 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 16:22:41,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:22:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:22:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:22:41,563 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-11-09 16:22:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:44,273 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 16:22:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 16:22:44,274 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 16:22:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:44,276 INFO L225 Difference]: With dead ends: 202 [2020-11-09 16:22:44,276 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 16:22:44,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-11-09 16:22:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 16:22:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-11-09 16:22:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-09 16:22:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-11-09 16:22:44,280 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-11-09 16:22:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:44,281 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-11-09 16:22:44,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:22:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-11-09 16:22:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 16:22:44,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:44,282 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:44,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-09 16:22:44,494 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-11-09 16:22:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:44,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617740618] [2020-11-09 16:22:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617740618] [2020-11-09 16:22:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194932200] [2020-11-09 16:22:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:22:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:45,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:45,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:45,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 16:22:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [430498754] [2020-11-09 16:22:45,231 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:45,235 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:45,247 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-11-09 16:22:45,247 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:45,285 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:45,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 16:22:45,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 16:22:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:22:45,286 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-11-09 16:22:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:48,127 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 16:22:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 16:22:48,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 16:22:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:48,129 INFO L225 Difference]: With dead ends: 202 [2020-11-09 16:22:48,129 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 16:22:48,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 16:22:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 16:22:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 16:22:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 16:22:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 16:22:48,133 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 16:22:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:48,133 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 16:22:48,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 16:22:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 16:22:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 16:22:48,134 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:48,134 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:48,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:48,342 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-11-09 16:22:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:48,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855724253] [2020-11-09 16:22:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855724253] [2020-11-09 16:22:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842674170] [2020-11-09 16:22:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:49,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:49,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:22:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:49,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:49,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:49,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 16:22:49,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1612045530] [2020-11-09 16:22:49,123 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:49,128 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:49,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-11-09 16:22:49,141 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:49,153 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:49,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:22:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:49,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:22:49,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:22:49,155 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 16:22:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:51,993 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 16:22:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 16:22:51,994 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-11-09 16:22:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:51,996 INFO L225 Difference]: With dead ends: 168 [2020-11-09 16:22:51,996 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:22:51,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 16:22:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:22:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 16:22:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 16:22:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 16:22:51,999 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 16:22:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:51,999 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 16:22:51,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:22:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 16:22:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:22:52,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:52,000 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:52,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:52,209 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-11-09 16:22:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:52,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156738497] [2020-11-09 16:22:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156738497] [2020-11-09 16:22:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012554669] [2020-11-09 16:22:53,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:53,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 16:22:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:22:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:53,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:53,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:53,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 16:22:53,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2092931607] [2020-11-09 16:22:53,193 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:53,198 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:53,216 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-11-09 16:22:53,216 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:53,217 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:53,218 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:53,264 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:53,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:53,298 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:53,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:53,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:22:53,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:22:53,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:22:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:22:53,330 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-11-09 16:22:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:54,797 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 16:22:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:22:54,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 16:22:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:54,799 INFO L225 Difference]: With dead ends: 168 [2020-11-09 16:22:54,799 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 16:22:54,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 16:22:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 16:22:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-11-09 16:22:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 16:22:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-11-09 16:22:54,803 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-11-09 16:22:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:54,803 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-11-09 16:22:54,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:22:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-11-09 16:22:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:22:54,804 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:54,804 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:55,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:55,011 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-11-09 16:22:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:55,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170583833] [2020-11-09 16:22:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170583833] [2020-11-09 16:22:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052495018] [2020-11-09 16:22:55,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:55,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 16:22:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:55,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:55,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:55,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 16:22:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155787674] [2020-11-09 16:22:55,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:55,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:55,854 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-11-09 16:22:55,854 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:55,859 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:55,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 16:22:55,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 16:22:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:22:55,861 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-11-09 16:22:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:58,777 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-11-09 16:22:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 16:22:58,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 16:22:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:58,780 INFO L225 Difference]: With dead ends: 204 [2020-11-09 16:22:58,780 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 16:22:58,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 16:22:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 16:22:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-11-09 16:22:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-09 16:22:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-11-09 16:22:58,783 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-11-09 16:22:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:58,783 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-11-09 16:22:58,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 16:22:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-11-09 16:22:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:22:58,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:58,784 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:58,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-09 16:22:58,994 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-11-09 16:22:58,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:58,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886164518] [2020-11-09 16:22:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:59,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886164518] [2020-11-09 16:22:59,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263329072] [2020-11-09 16:22:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:22:59,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 16:22:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 16:22:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:59,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:59,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:59,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 16:22:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578542499] [2020-11-09 16:22:59,835 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:59,850 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:59,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-11-09 16:22:59,864 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:59,910 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:59,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:22:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:22:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 16:22:59,910 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-11-09 16:23:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:02,975 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 16:23:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 16:23:02,976 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 16:23:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:02,978 INFO L225 Difference]: With dead ends: 212 [2020-11-09 16:23:02,978 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 16:23:02,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-11-09 16:23:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 16:23:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-09 16:23:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 16:23:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-11-09 16:23:02,982 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-11-09 16:23:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:02,982 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-11-09 16:23:02,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:23:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-11-09 16:23:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 16:23:02,983 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:02,983 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:03,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:03,184 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:03,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-11-09 16:23:03,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:03,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16829893] [2020-11-09 16:23:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16829893] [2020-11-09 16:23:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320750699] [2020-11-09 16:23:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:03,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-09 16:23:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:23:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:04,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:04,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:04,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 16:23:04,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [285495056] [2020-11-09 16:23:04,062 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:04,077 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:04,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-11-09 16:23:04,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:04,138 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 16:23:04,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 16:23:04,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:04,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 16:23:04,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:04,139 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-11-09 16:23:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:07,318 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 16:23:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 16:23:07,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 16:23:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:07,320 INFO L225 Difference]: With dead ends: 212 [2020-11-09 16:23:07,320 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 16:23:07,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-11-09 16:23:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 16:23:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 16:23:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 16:23:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 16:23:07,325 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 16:23:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:07,325 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 16:23:07,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 16:23:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 16:23:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 16:23:07,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:07,326 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:07,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-09 16:23:07,536 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-11-09 16:23:07,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:07,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864826909] [2020-11-09 16:23:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864826909] [2020-11-09 16:23:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232727796] [2020-11-09 16:23:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:23:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:08,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:08,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:08,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 16:23:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [601606515] [2020-11-09 16:23:08,442 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:08,447 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:08,488 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-11-09 16:23:08,489 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:08,514 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:08,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:23:08,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:23:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 16:23:08,516 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 16:23:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:11,682 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 16:23:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 16:23:11,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-11-09 16:23:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:11,684 INFO L225 Difference]: With dead ends: 176 [2020-11-09 16:23:11,684 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 16:23:11,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 16:23:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 16:23:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 16:23:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 16:23:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 16:23:11,688 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 16:23:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:11,688 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 16:23:11,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:23:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 16:23:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:11,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:11,689 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:11,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:11,889 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:11,890 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-11-09 16:23:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:11,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823570852] [2020-11-09 16:23:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:12,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823570852] [2020-11-09 16:23:12,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62196076] [2020-11-09 16:23:12,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:12,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:23:12,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:12,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:12,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:12,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:12,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 16:23:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [416885379] [2020-11-09 16:23:12,970 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:12,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:12,995 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-11-09 16:23:12,995 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:12,996 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:12,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:13,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:13,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:13,109 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:13,110 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:13,146 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:23:13,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:23:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:23:13,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:13,147 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-11-09 16:23:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:14,849 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-09 16:23:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 16:23:14,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 16:23:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:14,851 INFO L225 Difference]: With dead ends: 176 [2020-11-09 16:23:14,851 INFO L226 Difference]: Without dead ends: 170 [2020-11-09 16:23:14,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 16:23:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-09 16:23:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-11-09 16:23:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 16:23:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-11-09 16:23:14,857 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-11-09 16:23:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:14,858 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-11-09 16:23:14,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:23:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-11-09 16:23:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:14,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:14,859 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:15,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:15,069 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-11-09 16:23:15,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:15,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882821364] [2020-11-09 16:23:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:15,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882821364] [2020-11-09 16:23:15,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343158788] [2020-11-09 16:23:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:15,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 16:23:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 16:23:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:15,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:16,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:16,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 16:23:16,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [653090694] [2020-11-09 16:23:16,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:16,009 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:16,022 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-11-09 16:23:16,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:16,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:16,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 16:23:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 16:23:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:16,028 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-11-09 16:23:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:19,340 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-11-09 16:23:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 16:23:19,341 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-09 16:23:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:19,343 INFO L225 Difference]: With dead ends: 214 [2020-11-09 16:23:19,343 INFO L226 Difference]: Without dead ends: 209 [2020-11-09 16:23:19,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 16:23:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-09 16:23:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-11-09 16:23:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 16:23:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-11-09 16:23:19,347 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-11-09 16:23:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:19,347 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-11-09 16:23:19,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 16:23:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-11-09 16:23:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:19,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:19,348 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:19,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:19,549 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-11-09 16:23:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:19,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928955351] [2020-11-09 16:23:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:20,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928955351] [2020-11-09 16:23:20,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791069841] [2020-11-09 16:23:20,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:20,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:23:20,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 16:23:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:20,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:20,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:20,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 16:23:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18781980] [2020-11-09 16:23:20,478 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:20,482 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:20,496 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-11-09 16:23:20,496 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:20,544 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:20,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:23:20,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:23:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:23:20,545 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-11-09 16:23:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:24,007 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 16:23:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 16:23:24,008 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 16:23:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:24,010 INFO L225 Difference]: With dead ends: 222 [2020-11-09 16:23:24,010 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 16:23:24,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-11-09 16:23:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 16:23:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-11-09 16:23:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-09 16:23:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-11-09 16:23:24,014 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-11-09 16:23:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:24,014 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-11-09 16:23:24,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:23:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-11-09 16:23:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 16:23:24,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:24,015 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:24,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:24,216 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:24,216 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-11-09 16:23:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:24,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400017447] [2020-11-09 16:23:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:25,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400017447] [2020-11-09 16:23:25,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703266631] [2020-11-09 16:23:25,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:25,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-09 16:23:25,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:25,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:25,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:25,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 16:23:25,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1158671025] [2020-11-09 16:23:25,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:25,212 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:25,232 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-11-09 16:23:25,233 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:25,275 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:25,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 16:23:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 16:23:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:23:25,276 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-11-09 16:23:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:28,872 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 16:23:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 16:23:28,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 16:23:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:28,875 INFO L225 Difference]: With dead ends: 222 [2020-11-09 16:23:28,875 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 16:23:28,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-11-09 16:23:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 16:23:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-11-09 16:23:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 16:23:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 16:23:28,879 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-11-09 16:23:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:28,879 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 16:23:28,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 16:23:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 16:23:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 16:23:28,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:28,880 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:29,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:29,082 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-11-09 16:23:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:29,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327493] [2020-11-09 16:23:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:29,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327493] [2020-11-09 16:23:29,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499047580] [2020-11-09 16:23:29,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:29,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-09 16:23:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:30,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:30,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:30,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 16:23:30,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [983812069] [2020-11-09 16:23:30,095 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:30,100 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:30,121 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-11-09 16:23:30,121 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:30,139 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:23:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:23:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:23:30,141 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-11-09 16:23:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:33,733 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-11-09 16:23:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 16:23:33,734 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-11-09 16:23:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:33,735 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:23:33,735 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 16:23:33,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-11-09 16:23:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 16:23:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-11-09 16:23:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 16:23:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-09 16:23:33,738 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-09 16:23:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:33,739 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-09 16:23:33,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:23:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-09 16:23:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:23:33,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:33,739 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:33,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:33,940 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-11-09 16:23:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:33,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202324337] [2020-11-09 16:23:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:35,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202324337] [2020-11-09 16:23:35,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912981485] [2020-11-09 16:23:35,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:23:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:35,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:35,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:35,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-09 16:23:35,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [642753866] [2020-11-09 16:23:35,174 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:35,180 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:35,204 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-11-09 16:23:35,204 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:35,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:35,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:35,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:35,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:35,316 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:35,317 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:35,359 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:23:35,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:23:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:23:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:23:35,360 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-11-09 16:23:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:37,259 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-09 16:23:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:23:37,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 16:23:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:37,260 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:23:37,261 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 16:23:37,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 16:23:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 16:23:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-11-09 16:23:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-09 16:23:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-11-09 16:23:37,264 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-11-09 16:23:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:37,264 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-11-09 16:23:37,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:23:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-11-09 16:23:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:23:37,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:37,266 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:37,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:37,469 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-11-09 16:23:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203438669] [2020-11-09 16:23:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:38,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203438669] [2020-11-09 16:23:38,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740322625] [2020-11-09 16:23:38,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:38,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:23:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 16:23:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:38,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:38,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:38,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 16:23:38,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1595535394] [2020-11-09 16:23:38,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:38,536 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:38,557 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-11-09 16:23:38,557 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:38,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:38,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 16:23:38,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 16:23:38,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:23:38,571 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-11-09 16:23:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:42,319 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-11-09 16:23:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 16:23:42,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-09 16:23:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:42,322 INFO L225 Difference]: With dead ends: 224 [2020-11-09 16:23:42,322 INFO L226 Difference]: Without dead ends: 219 [2020-11-09 16:23:42,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 16:23:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-09 16:23:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-11-09 16:23:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 16:23:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-11-09 16:23:42,327 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-11-09 16:23:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:42,328 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-11-09 16:23:42,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 16:23:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-11-09 16:23:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:23:42,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:42,328 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:42,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-09 16:23:42,540 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-11-09 16:23:42,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:42,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212099560] [2020-11-09 16:23:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212099560] [2020-11-09 16:23:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352785755] [2020-11-09 16:23:43,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:43,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-09 16:23:43,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 16:23:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:43,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:43,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:43,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 16:23:43,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [733496113] [2020-11-09 16:23:43,594 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:43,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:43,622 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-11-09 16:23:43,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:43,679 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 16:23:43,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:23:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:23:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:23:43,680 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-11-09 16:23:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:47,526 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 16:23:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 16:23:47,527 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 16:23:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:47,529 INFO L225 Difference]: With dead ends: 232 [2020-11-09 16:23:47,529 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 16:23:47,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-11-09 16:23:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 16:23:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-11-09 16:23:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-09 16:23:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-11-09 16:23:47,533 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-11-09 16:23:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:47,533 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-11-09 16:23:47,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:23:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-11-09 16:23:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 16:23:47,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:47,534 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:47,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:47,734 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-11-09 16:23:47,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:47,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006233219] [2020-11-09 16:23:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:48,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006233219] [2020-11-09 16:23:48,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141172060] [2020-11-09 16:23:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:48,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:23:48,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:23:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:48,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:48,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 16:23:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1282935588] [2020-11-09 16:23:48,827 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:48,831 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:48,847 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-11-09 16:23:48,847 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:48,915 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:48,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 16:23:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 16:23:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:23:48,917 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-11-09 16:23:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:52,933 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 16:23:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 16:23:52,934 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 16:23:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:52,935 INFO L225 Difference]: With dead ends: 232 [2020-11-09 16:23:52,935 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 16:23:52,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-11-09 16:23:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 16:23:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-11-09 16:23:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 16:23:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 16:23:52,942 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-11-09 16:23:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:52,943 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 16:23:52,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 16:23:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 16:23:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 16:23:52,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:52,943 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:53,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-09 16:23:53,154 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-11-09 16:23:53,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:53,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882075205] [2020-11-09 16:23:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:54,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882075205] [2020-11-09 16:23:54,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299113224] [2020-11-09 16:23:54,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:54,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-09 16:23:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:23:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:54,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:54,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:54,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 16:23:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252869364] [2020-11-09 16:23:54,288 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:54,292 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:54,308 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-11-09 16:23:54,308 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:54,319 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:54,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:23:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:23:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:23:54,321 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-11-09 16:23:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:58,362 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-11-09 16:23:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 16:23:58,363 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-11-09 16:23:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:58,364 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:23:58,364 INFO L226 Difference]: Without dead ends: 187 [2020-11-09 16:23:58,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-11-09 16:23:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-09 16:23:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-11-09 16:23:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-09 16:23:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-09 16:23:58,368 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-09 16:23:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:58,368 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-09 16:23:58,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:23:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-09 16:23:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 16:23:58,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:58,369 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:58,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:58,571 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-11-09 16:23:58,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:58,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454173107] [2020-11-09 16:23:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454173107] [2020-11-09 16:23:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945480550] [2020-11-09 16:23:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:23:59,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-09 16:23:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 16:23:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:59,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:59,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:59,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-09 16:23:59,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [286685933] [2020-11-09 16:23:59,956 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:59,960 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:59,983 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-11-09 16:23:59,984 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:59,985 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:59,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:00,046 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:00,046 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:00,094 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:00,094 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:00,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:24:00,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 16:24:00,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 16:24:00,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:24:00,138 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-11-09 16:24:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:02,186 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-09 16:24:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 16:24:02,187 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 16:24:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:02,189 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:24:02,189 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 16:24:02,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 16:24:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 16:24:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-11-09 16:24:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-09 16:24:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-11-09 16:24:02,193 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-11-09 16:24:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:02,193 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-11-09 16:24:02,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 16:24:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-11-09 16:24:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 16:24:02,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:02,194 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:02,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:02,404 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-11-09 16:24:02,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:02,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65271924] [2020-11-09 16:24:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:03,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65271924] [2020-11-09 16:24:03,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493322154] [2020-11-09 16:24:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 16:24:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:03,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:03,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:03,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 16:24:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1646384919] [2020-11-09 16:24:03,572 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:03,577 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:03,593 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-11-09 16:24:03,593 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:03,598 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:03,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 16:24:03,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:03,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 16:24:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:24:03,600 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. [2020-11-09 16:24:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:07,849 INFO L93 Difference]: Finished difference Result 234 states and 559 transitions. [2020-11-09 16:24:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 16:24:07,850 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-09 16:24:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:07,852 INFO L225 Difference]: With dead ends: 234 [2020-11-09 16:24:07,852 INFO L226 Difference]: Without dead ends: 229 [2020-11-09 16:24:07,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4436, Invalid=9844, Unknown=0, NotChecked=0, Total=14280 [2020-11-09 16:24:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-09 16:24:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 110. [2020-11-09 16:24:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-09 16:24:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2020-11-09 16:24:07,856 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 46 [2020-11-09 16:24:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:07,856 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2020-11-09 16:24:07,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 16:24:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2020-11-09 16:24:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 16:24:07,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:07,856 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:08,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:08,057 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 92 times [2020-11-09 16:24:08,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:08,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145061718] [2020-11-09 16:24:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145061718] [2020-11-09 16:24:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718366722] [2020-11-09 16:24:09,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:09,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:24:09,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 16:24:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:09,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:09,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 16:24:09,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [228488678] [2020-11-09 16:24:09,242 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:09,246 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:09,270 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 60 transitions. [2020-11-09 16:24:09,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:09,332 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45015#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 43))] [2020-11-09 16:24:09,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 16:24:09,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 16:24:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 16:24:09,333 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand 43 states. [2020-11-09 16:24:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:13,784 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 16:24:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 16:24:13,785 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 16:24:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:13,786 INFO L225 Difference]: With dead ends: 242 [2020-11-09 16:24:13,786 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 16:24:13,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4285, Invalid=9757, Unknown=0, NotChecked=0, Total=14042 [2020-11-09 16:24:13,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 16:24:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-11-09 16:24:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-09 16:24:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2020-11-09 16:24:13,793 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 46 [2020-11-09 16:24:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:13,793 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2020-11-09 16:24:13,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 16:24:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2020-11-09 16:24:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 16:24:13,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:13,794 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:14,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:14,006 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 93 times [2020-11-09 16:24:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:14,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191122266] [2020-11-09 16:24:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:15,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191122266] [2020-11-09 16:24:15,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896988076] [2020-11-09 16:24:15,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:15,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-09 16:24:15,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 16:24:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 16:24:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [260846218] [2020-11-09 16:24:15,253 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:15,258 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:15,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 57 transitions. [2020-11-09 16:24:15,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:15,337 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45890#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 16:24:15,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 16:24:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 16:24:15,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 16:24:15,339 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand 44 states. [2020-11-09 16:24:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:19,889 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 16:24:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-09 16:24:19,890 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-09 16:24:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:19,892 INFO L225 Difference]: With dead ends: 242 [2020-11-09 16:24:19,892 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 16:24:19,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4504 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4702, Invalid=10550, Unknown=0, NotChecked=0, Total=15252 [2020-11-09 16:24:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 16:24:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-11-09 16:24:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 16:24:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-11-09 16:24:19,896 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-11-09 16:24:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:19,896 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-11-09 16:24:19,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 16:24:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-11-09 16:24:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 16:24:19,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:19,897 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:20,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-11-09 16:24:20,098 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 94 times [2020-11-09 16:24:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:20,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734557554] [2020-11-09 16:24:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734557554] [2020-11-09 16:24:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31198247] [2020-11-09 16:24:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:21,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:24:21,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:21,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 16:24:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:21,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:21,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:21,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 16:24:21,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1687897432] [2020-11-09 16:24:21,353 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:21,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:21,375 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 59 transitions. [2020-11-09 16:24:21,375 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:21,387 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:21,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 16:24:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 16:24:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 16:24:21,389 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-11-09 16:24:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:25,953 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-11-09 16:24:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 16:24:25,954 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-11-09 16:24:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:25,955 INFO L225 Difference]: With dead ends: 200 [2020-11-09 16:24:25,956 INFO L226 Difference]: Without dead ends: 195 [2020-11-09 16:24:25,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4464, Invalid=10056, Unknown=0, NotChecked=0, Total=14520 [2020-11-09 16:24:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-09 16:24:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-11-09 16:24:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-09 16:24:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-11-09 16:24:25,960 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-11-09 16:24:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:25,961 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-11-09 16:24:25,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 16:24:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-11-09 16:24:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 16:24:25,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:25,962 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:26,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:26,162 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 95 times [2020-11-09 16:24:26,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:26,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356188968] [2020-11-09 16:24:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:27,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356188968] [2020-11-09 16:24:27,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692209582] [2020-11-09 16:24:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:27,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-09 16:24:27,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-09 16:24:27,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:27,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:27,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:27,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-11-09 16:24:27,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555603011] [2020-11-09 16:24:27,705 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:27,711 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:27,731 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 63 transitions. [2020-11-09 16:24:27,731 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:27,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:27,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:27,794 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:27,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:27,847 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:27,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:27,890 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47532#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 16:24:27,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-09 16:24:27,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:27,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-09 16:24:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 16:24:27,892 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 45 states. [2020-11-09 16:24:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:30,300 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-11-09 16:24:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 16:24:30,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-11-09 16:24:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:30,303 INFO L225 Difference]: With dead ends: 200 [2020-11-09 16:24:30,303 INFO L226 Difference]: Without dead ends: 194 [2020-11-09 16:24:30,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2320, Invalid=5162, Unknown=0, NotChecked=0, Total=7482 [2020-11-09 16:24:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-09 16:24:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2020-11-09 16:24:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-09 16:24:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 401 transitions. [2020-11-09 16:24:30,307 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 401 transitions. Word has length 48 [2020-11-09 16:24:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:30,308 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 401 transitions. [2020-11-09 16:24:30,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-09 16:24:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 401 transitions. [2020-11-09 16:24:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 16:24:30,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:30,309 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:30,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-09 16:24:30,520 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2130926905, now seen corresponding path program 96 times [2020-11-09 16:24:30,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:30,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998387303] [2020-11-09 16:24:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998387303] [2020-11-09 16:24:31,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270223629] [2020-11-09 16:24:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:31,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-11-09 16:24:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 16:24:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:31,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:31,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:31,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-09 16:24:31,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1435203149] [2020-11-09 16:24:31,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:31,845 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:31,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 56 transitions. [2020-11-09 16:24:31,864 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:31,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:31,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 16:24:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:31,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 16:24:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 16:24:31,878 INFO L87 Difference]: Start difference. First operand 155 states and 401 transitions. Second operand 44 states. [2020-11-09 16:24:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:36,644 INFO L93 Difference]: Finished difference Result 244 states and 583 transitions. [2020-11-09 16:24:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-09 16:24:36,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-11-09 16:24:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:36,646 INFO L225 Difference]: With dead ends: 244 [2020-11-09 16:24:36,646 INFO L226 Difference]: Without dead ends: 239 [2020-11-09 16:24:36,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4690 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4889, Invalid=10861, Unknown=0, NotChecked=0, Total=15750 [2020-11-09 16:24:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-09 16:24:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 114. [2020-11-09 16:24:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 16:24:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 279 transitions. [2020-11-09 16:24:36,650 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 279 transitions. Word has length 48 [2020-11-09 16:24:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:36,650 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 279 transitions. [2020-11-09 16:24:36,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 16:24:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 279 transitions. [2020-11-09 16:24:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 16:24:36,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:36,650 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:36,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:36,851 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash 194284373, now seen corresponding path program 97 times [2020-11-09 16:24:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:36,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908964829] [2020-11-09 16:24:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:38,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908964829] [2020-11-09 16:24:38,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191568871] [2020-11-09 16:24:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:24:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 16:24:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:38,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:24:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:38,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:38,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-09 16:24:38,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1705085163] [2020-11-09 16:24:38,183 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:38,188 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:38,208 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 62 transitions. [2020-11-09 16:24:38,208 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:38,274 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49133#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 45))] [2020-11-09 16:24:38,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-09 16:24:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-09 16:24:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1597, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 16:24:38,275 INFO L87 Difference]: Start difference. First operand 114 states and 279 transitions. Second operand 45 states. Received shutdown request... [2020-11-09 16:24:38,329 WARN L211 SmtUtils]: Removed 5 from assertion stack [2020-11-09 16:24:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 16:24:38,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:38,530 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 16:24:38,534 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 16:24:38,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:24:38 BasicIcfg [2020-11-09 16:24:38,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 16:24:38,535 INFO L168 Benchmark]: Toolchain (without parser) took 238689.27 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.1 MB in the beginning and 180.2 MB in the end (delta: -55.1 MB). Peak memory consumption was 110.0 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,536 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 16:24:38,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.28 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 128.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.33 ms. Allocated memory is still 151.0 MB. Free memory was 128.1 MB in the beginning and 126.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,536 INFO L168 Benchmark]: Boogie Preprocessor took 29.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 125.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,537 INFO L168 Benchmark]: RCFGBuilder took 526.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 104.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,537 INFO L168 Benchmark]: TraceAbstraction took 237375.62 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.1 MB in the beginning and 180.2 MB in the end (delta: -76.1 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:38,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 699.28 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 128.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.33 ms. Allocated memory is still 151.0 MB. Free memory was 128.1 MB in the beginning and 126.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 125.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 526.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 104.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 237375.62 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.1 MB in the beginning and 180.2 MB in the end (delta: -76.1 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.4s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (114states) and FLOYD_HOARE automaton (currently 3 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 11ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 237.2s, OverallIterations: 99, TraceHistogramMax: 20, AutomataDifference: 152.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 1395 SDtfs, 8865 SDslu, 11689 SDs, 0 SdLazy, 13332 SolverSat, 10410 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9198 GetRequests, 3035 SyntacticMatches, 117 SemanticMatches, 6045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131991 ImplicationChecksByTransitivity, 168.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 98 MinimizatonAttempts, 4483 StatesRemovedByMinimization, 97 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 45.8s InterpolantComputationTime, 5658 NumberOfCodeBlocks, 5658 NumberOfCodeBlocksAsserted, 702 NumberOfCheckSat, 5464 ConstructedInterpolants, 0 QuantifiedInterpolants, 721094 SizeOfPredicates, 2071 NumberOfNonLiveVariables, 17670 ConjunctsInSsa, 2461 ConjunctsInUnsatCore, 194 InterpolantComputations, 4 PerfectInterpolantSequences, 0/25840 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