/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 13:13:20,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 13:13:20,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 13:13:20,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 13:13:20,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 13:13:20,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 13:13:20,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 13:13:20,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 13:13:20,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 13:13:20,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 13:13:20,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 13:13:20,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 13:13:20,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 13:13:20,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 13:13:20,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 13:13:20,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 13:13:20,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 13:13:20,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 13:13:20,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 13:13:20,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 13:13:20,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 13:13:20,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 13:13:20,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 13:13:20,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 13:13:20,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 13:13:20,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 13:13:20,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 13:13:20,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 13:13:20,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 13:13:20,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 13:13:20,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 13:13:20,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 13:13:20,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 13:13:20,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 13:13:20,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 13:13:20,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 13:13:20,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 13:13:20,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 13:13:20,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 13:13:20,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 13:13:20,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 13:13:20,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 13:13:20,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 13:13:20,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 13:13:20,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 13:13:20,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 13:13:20,185 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 13:13:20,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 13:13:20,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 13:13:20,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 13:13:20,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 13:13:20,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 13:13:20,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 13:13:20,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 13:13:20,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 13:13:20,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 13:13:20,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 13:13:20,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 13:13:20,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 13:13:20,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 13:13:20,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 13:13:20,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 13:13:20,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 13:13:20,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:13:20,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 13:13:20,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 13:13:20,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 13:13:20,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 13:13:20,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 13:13:20,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 13:13:20,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 13:13:20,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 13:13:20,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 13:13:20,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 13:13:20,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 13:13:20,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 13:13:20,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 13:13:20,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-11 13:13:20,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6e031c0/75ea801221f14761aa22b83c437ef0f8/FLAG66f664b70 [2020-10-11 13:13:21,175 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 13:13:21,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-11 13:13:21,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6e031c0/75ea801221f14761aa22b83c437ef0f8/FLAG66f664b70 [2020-10-11 13:13:21,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6e031c0/75ea801221f14761aa22b83c437ef0f8 [2020-10-11 13:13:21,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 13:13:21,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 13:13:21,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:21,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 13:13:21,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 13:13:21,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:21" (1/1) ... [2020-10-11 13:13:21,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c73ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:21, skipping insertion in model container [2020-10-11 13:13:21,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:21" (1/1) ... [2020-10-11 13:13:21,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 13:13:21,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 13:13:21,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:21,997 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 13:13:22,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:22,136 INFO L208 MainTranslator]: Completed translation [2020-10-11 13:13:22,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22 WrapperNode [2020-10-11 13:13:22,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:22,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:22,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 13:13:22,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 13:13:22,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:22,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 13:13:22,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 13:13:22,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 13:13:22,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (1/1) ... [2020-10-11 13:13:22,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 13:13:22,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 13:13:22,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 13:13:22,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 13:13:22,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (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 [2020-10-11 13:13:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 13:13:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 13:13:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 13:13:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 13:13:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 13:13:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 13:13:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 13:13:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 13:13:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 13:13:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 13:13:22,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 13:13:22,297 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 13:13:22,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 13:13:22,576 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 13:13:22,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:22 BoogieIcfgContainer [2020-10-11 13:13:22,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 13:13:22,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 13:13:22,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 13:13:22,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 13:13:22,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:13:21" (1/3) ... [2020-10-11 13:13:22,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ac121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:22, skipping insertion in model container [2020-10-11 13:13:22,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:22" (2/3) ... [2020-10-11 13:13:22,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ac121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:22, skipping insertion in model container [2020-10-11 13:13:22,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:22" (3/3) ... [2020-10-11 13:13:22,604 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-11 13:13:22,635 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 13:13:22,635 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 13:13:22,645 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 13:13:22,646 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 13:13:22,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,674 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,674 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,674 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,675 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,675 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,675 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,675 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,676 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,676 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,678 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,678 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,680 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,680 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,685 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,695 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,696 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,696 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:22,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 13:13:22,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 13:13:22,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 13:13:22,727 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 13:13:22,727 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 13:13:22,727 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 13:13:22,727 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 13:13:22,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 13:13:22,728 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 13:13:22,739 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 13:13:22,741 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:22,743 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:22,745 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:22,784 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 13:13:22,784 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 13:13:22,790 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-11 13:13:22,794 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-11 13:13:24,055 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-11 13:13:24,055 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-11 13:13:24,063 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-11 13:13:24,076 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 13:13:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 13:13:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 13:13:24,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,086 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,086 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-11 13:13:24,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129239404] [2020-10-11 13:13:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129239404] [2020-10-11 13:13:24,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:24,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 13:13:24,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759421278] [2020-10-11 13:13:24,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 13:13:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 13:13:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 13:13:24,347 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 13:13:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,415 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-11 13:13:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 13:13:24,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 13:13:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,430 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:24,430 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 13:13:24,432 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 13:13:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 13:13:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-11 13:13:24,472 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-11 13:13:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,472 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-11 13:13:24,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 13:13:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-11 13:13:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 13:13:24,474 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,474 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 13:13:24,474 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-11 13:13:24,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082549310] [2020-10-11 13:13:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082549310] [2020-10-11 13:13:24,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 13:13:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646733438] [2020-10-11 13:13:24,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 13:13:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 13:13:24,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:24,579 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-11 13:13:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,632 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-11 13:13:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 13:13:24,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 13:13:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,635 INFO L225 Difference]: With dead ends: 56 [2020-10-11 13:13:24,635 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:24,636 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-11 13:13:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-11 13:13:24,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-11 13:13:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,654 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-11 13:13:24,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 13:13:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-11 13:13:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:24,655 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,656 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 13:13:24,656 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-11 13:13:24,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597492993] [2020-10-11 13:13:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597492993] [2020-10-11 13:13:24,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:24,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:24,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051914758] [2020-10-11 13:13:24,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:24,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:24,773 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-11 13:13:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,853 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-11 13:13:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:24,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,856 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:24,856 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:24,857 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-11 13:13:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:24,867 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-11 13:13:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,867 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:24,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:24,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,869 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 13:13:24,870 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-11 13:13:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432027041] [2020-10-11 13:13:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432027041] [2020-10-11 13:13:24,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310466253] [2020-10-11 13:13:24,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:24,976 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-11 13:13:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,063 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:25,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,067 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:25,067 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:25,068 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-11 13:13:25,083 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-11 13:13:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,084 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-11 13:13:25,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-11 13:13:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:25,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,085 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 13:13:25,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-11 13:13:25,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132897666] [2020-10-11 13:13:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132897666] [2020-10-11 13:13:25,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:25,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549184906] [2020-10-11 13:13:25,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:25,171 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-11 13:13:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,271 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-11 13:13:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:25,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,279 INFO L225 Difference]: With dead ends: 57 [2020-10-11 13:13:25,280 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 13:13:25,280 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 13:13:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-11 13:13:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:25,284 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-11 13:13:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,285 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:25,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:25,285 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,285 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 13:13:25,286 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,286 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-11 13:13:25,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628202300] [2020-10-11 13:13:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628202300] [2020-10-11 13:13:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391170988] [2020-10-11 13:13:25,363 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:25,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:25,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:25,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879790426] [2020-10-11 13:13:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:25,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:25,518 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-11 13:13:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,638 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-11 13:13:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:25,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,640 INFO L225 Difference]: With dead ends: 48 [2020-10-11 13:13:25,640 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:25,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-11 13:13:25,649 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-11 13:13:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,650 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-11 13:13:25,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-11 13:13:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:25,651 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,651 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 13:13:25,864 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-11 13:13:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695814488] [2020-10-11 13:13:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695814488] [2020-10-11 13:13:25,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790555652] [2020-10-11 13:13:25,959 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493198536] [2020-10-11 13:13:26,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:26,025 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-11 13:13:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,087 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:26,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,088 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:26,089 INFO L226 Difference]: Without dead ends: 48 [2020-10-11 13:13:26,089 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-11 13:13:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-11 13:13:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-11 13:13:26,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-11 13:13:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,094 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-11 13:13:26,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-11 13:13:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:26,095 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,096 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-11 13:13:26,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640980235] [2020-10-11 13:13:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640980235] [2020-10-11 13:13:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629095194] [2020-10-11 13:13:26,361 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:26,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029035844] [2020-10-11 13:13:26,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:26,473 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-11 13:13:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,589 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-11 13:13:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 13:13:26,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,590 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:26,590 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 13:13:26,591 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 13:13:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 13:13:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:26,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-11 13:13:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,596 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:26,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:26,597 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,597 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,809 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-11 13:13:26,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304628227] [2020-10-11 13:13:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304628227] [2020-10-11 13:13:26,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199744305] [2020-10-11 13:13:26,861 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:26,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851836971] [2020-10-11 13:13:26,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:26,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:26,924 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-11 13:13:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,055 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:27,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,057 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:27,057 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:27,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-11 13:13:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-11 13:13:27,068 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-11 13:13:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:27,069 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-11 13:13:27,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-11 13:13:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:27,070 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:27,070 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:27,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,284 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-11 13:13:27,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669935125] [2020-10-11 13:13:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669935125] [2020-10-11 13:13:27,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441705296] [2020-10-11 13:13:27,353 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091072408] [2020-10-11 13:13:27,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:27,437 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-11 13:13:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,604 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-11 13:13:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:27,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,605 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:27,605 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:27,606 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-11 13:13:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-11 13:13:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-11 13:13:27,610 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-11 13:13:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:27,610 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-11 13:13:27,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-11 13:13:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:27,611 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:27,612 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:27,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 13:13:27,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-11 13:13:27,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:27,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209060789] [2020-10-11 13:13:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209060789] [2020-10-11 13:13:27,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435480010] [2020-10-11 13:13:27,884 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 13:13:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:27,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753394026] [2020-10-11 13:13:27,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:27,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:27,951 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-11 13:13:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,058 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-11 13:13:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:28,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,060 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:28,060 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 13:13:28,060 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 13:13:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-11 13:13:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-11 13:13:28,064 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-11 13:13:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,065 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-11 13:13:28,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-11 13:13:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:28,066 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,066 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:28,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,277 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-11 13:13:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:28,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444031946] [2020-10-11 13:13:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444031946] [2020-10-11 13:13:28,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814498807] [2020-10-11 13:13:28,341 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:28,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635317919] [2020-10-11 13:13:28,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:28,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:28,433 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-11 13:13:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,586 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-11 13:13:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:28,587 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,588 INFO L225 Difference]: With dead ends: 61 [2020-10-11 13:13:28,588 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:28,588 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-11 13:13:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:28,592 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-11 13:13:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,592 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:28,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:28,593 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,593 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:28,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,802 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-11 13:13:28,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:28,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478119327] [2020-10-11 13:13:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478119327] [2020-10-11 13:13:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260753818] [2020-10-11 13:13:28,868 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:28,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211874847] [2020-10-11 13:13:28,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:28,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:28,935 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-11 13:13:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,088 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:29,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,090 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:29,091 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:29,091 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-11 13:13:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-11 13:13:29,096 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-11 13:13:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,096 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-11 13:13:29,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-11 13:13:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:29,097 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,098 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 13:13:29,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-11 13:13:29,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666766587] [2020-10-11 13:13:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666766587] [2020-10-11 13:13:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899027605] [2020-10-11 13:13:29,364 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942174635] [2020-10-11 13:13:29,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:29,454 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-11 13:13:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,683 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-11 13:13:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:29,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,684 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:29,684 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:29,685 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-11 13:13:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 13:13:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-11 13:13:29,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-11 13:13:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,688 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-11 13:13:29,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-11 13:13:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:29,689 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,689 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,899 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-11 13:13:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946283845] [2020-10-11 13:13:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946283845] [2020-10-11 13:13:29,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999360965] [2020-10-11 13:13:29,949 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:30,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:30,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:30,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792896110] [2020-10-11 13:13:30,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:30,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:30,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:30,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:30,043 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-11 13:13:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,218 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-11 13:13:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:30,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,219 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:30,220 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:30,220 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:30,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-11 13:13:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:30,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-11 13:13:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,224 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:30,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:30,225 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,225 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 13:13:30,435 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-11 13:13:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063046001] [2020-10-11 13:13:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063046001] [2020-10-11 13:13:30,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254682695] [2020-10-11 13:13:30,514 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:30,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:30,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:30,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:30,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:30,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229820488] [2020-10-11 13:13:30,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:30,596 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-11 13:13:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,794 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-11 13:13:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:30,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,802 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:30,802 INFO L226 Difference]: Without dead ends: 49 [2020-10-11 13:13:30,803 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-11 13:13:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-11 13:13:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 13:13:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-11 13:13:30,806 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-11 13:13:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,808 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-11 13:13:30,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-11 13:13:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:30,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,810 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 13:13:31,012 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-11 13:13:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169068646] [2020-10-11 13:13:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169068646] [2020-10-11 13:13:31,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191598044] [2020-10-11 13:13:31,081 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:31,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870807601] [2020-10-11 13:13:31,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:31,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:31,172 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-11 13:13:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:31,296 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-11 13:13:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:31,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:31,298 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:31,298 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:31,298 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-11 13:13:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-11 13:13:31,304 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-11 13:13:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:31,304 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-11 13:13:31,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-11 13:13:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:31,306 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:31,306 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 13:13:31,517 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-11 13:13:31,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744890923] [2020-10-11 13:13:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744890923] [2020-10-11 13:13:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502606027] [2020-10-11 13:13:31,583 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311166648] [2020-10-11 13:13:31,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:31,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:31,663 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-11 13:13:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:31,819 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-11 13:13:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:31,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:31,821 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:31,821 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:31,822 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-11 13:13:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:31,825 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-11 13:13:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:31,825 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:31,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:31,826 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:31,826 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 13:13:32,034 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-11 13:13:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789876575] [2020-10-11 13:13:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789876575] [2020-10-11 13:13:32,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319016419] [2020-10-11 13:13:32,103 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:32,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:32,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:32,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:32,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639159076] [2020-10-11 13:13:32,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:32,157 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-11 13:13:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,329 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-11 13:13:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:32,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,330 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:32,330 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:32,331 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-11 13:13:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 13:13:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-11 13:13:32,333 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-11 13:13:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,333 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-11 13:13:32,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-11 13:13:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:32,334 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,334 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,535 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-11 13:13:32,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146103560] [2020-10-11 13:13:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146103560] [2020-10-11 13:13:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589822425] [2020-10-11 13:13:32,602 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:32,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:32,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:32,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771396121] [2020-10-11 13:13:32,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:32,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:32,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:32,680 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-11 13:13:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,882 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-11 13:13:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:32,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,886 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:32,886 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:32,887 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-11 13:13:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:32,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-11 13:13:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,890 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:32,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:32,890 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,891 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,099 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-11 13:13:33,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079110225] [2020-10-11 13:13:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079110225] [2020-10-11 13:13:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300076791] [2020-10-11 13:13:33,150 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:33,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617955053] [2020-10-11 13:13:33,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:33,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:33,240 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-11 13:13:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:33,410 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:33,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:33,411 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:33,411 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:33,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-11 13:13:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-11 13:13:33,415 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-11 13:13:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:33,416 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-11 13:13:33,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-11 13:13:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:33,416 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:33,416 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,624 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-11 13:13:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545728311] [2020-10-11 13:13:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545728311] [2020-10-11 13:13:33,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808148006] [2020-10-11 13:13:33,673 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793985720] [2020-10-11 13:13:33,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:33,752 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-11 13:13:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,014 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-11 13:13:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:34,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,018 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:34,018 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:34,019 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-11 13:13:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-11 13:13:34,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-11 13:13:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,023 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-11 13:13:34,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-11 13:13:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:34,024 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,024 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:34,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 13:13:34,235 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-11 13:13:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:34,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295398467] [2020-10-11 13:13:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295398467] [2020-10-11 13:13:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482927064] [2020-10-11 13:13:34,328 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861238603] [2020-10-11 13:13:34,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:34,402 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-11 13:13:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,544 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-11 13:13:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:34,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,546 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:34,546 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:34,546 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-11 13:13:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:34,549 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,549 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:34,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:34,551 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,551 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:34,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 13:13:34,752 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-11 13:13:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:34,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753542583] [2020-10-11 13:13:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753542583] [2020-10-11 13:13:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248841630] [2020-10-11 13:13:34,827 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:34,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:34,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429282376] [2020-10-11 13:13:34,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:34,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:34,921 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:35,083 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-11 13:13:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:35,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:35,084 INFO L225 Difference]: With dead ends: 71 [2020-10-11 13:13:35,085 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 13:13:35,085 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 13:13:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-11 13:13:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:35,089 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:35,089 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:35,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:35,089 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:35,089 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 13:13:35,290 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-11 13:13:35,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116708744] [2020-10-11 13:13:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116708744] [2020-10-11 13:13:35,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168360146] [2020-10-11 13:13:35,360 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:35,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033724830] [2020-10-11 13:13:35,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:35,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:35,430 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:35,589 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-11 13:13:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:35,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:35,590 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:35,590 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:35,590 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-11 13:13:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:35,593 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:35,593 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:35,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:35,594 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:35,594 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 13:13:35,803 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-11 13:13:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036762823] [2020-10-11 13:13:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036762823] [2020-10-11 13:13:35,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940878843] [2020-10-11 13:13:35,869 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:35,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:35,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242447233] [2020-10-11 13:13:35,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:35,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:35,950 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:36,205 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-11 13:13:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:36,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:36,206 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:36,206 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:36,207 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-11 13:13:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:36,209 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:36,210 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:36,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:36,210 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:36,210 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:36,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 13:13:36,419 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-11 13:13:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006650284] [2020-10-11 13:13:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006650284] [2020-10-11 13:13:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090161356] [2020-10-11 13:13:36,479 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:36,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:36,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770733307] [2020-10-11 13:13:36,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:36,554 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:36,765 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:36,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:36,766 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:36,766 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:36,767 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-11 13:13:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-11 13:13:36,769 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-11 13:13:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:36,769 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-11 13:13:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-11 13:13:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:36,770 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:36,770 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:36,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:36,971 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-11 13:13:36,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:36,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130094427] [2020-10-11 13:13:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130094427] [2020-10-11 13:13:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424490607] [2020-10-11 13:13:37,034 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:37,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:37,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:37,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476125295] [2020-10-11 13:13:37,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:37,099 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-11 13:13:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,367 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-11 13:13:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:37,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,368 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:37,368 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:37,369 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-11 13:13:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 13:13:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-11 13:13:37,371 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-11 13:13:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,371 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-11 13:13:37,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-11 13:13:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:37,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,372 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:37,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 13:13:37,580 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-11 13:13:37,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:37,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894262792] [2020-10-11 13:13:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894262792] [2020-10-11 13:13:37,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140959790] [2020-10-11 13:13:37,638 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:37,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:37,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:37,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376226707] [2020-10-11 13:13:37,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:37,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:37,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:37,712 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-11 13:13:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,970 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-11 13:13:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:37,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,971 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:37,971 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:37,972 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-11 13:13:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:37,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-11 13:13:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,976 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:37,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:37,976 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,976 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 13:13:38,177 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-11 13:13:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799586178] [2020-10-11 13:13:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799586178] [2020-10-11 13:13:38,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614039353] [2020-10-11 13:13:38,255 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:38,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:38,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374663083] [2020-10-11 13:13:38,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:38,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:38,383 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-11 13:13:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:38,646 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-11 13:13:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:38,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:38,647 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:38,648 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:38,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-11 13:13:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-11 13:13:38,651 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-11 13:13:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:38,651 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-11 13:13:38,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-11 13:13:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:38,652 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:38,652 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,860 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-11 13:13:38,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500779162] [2020-10-11 13:13:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500779162] [2020-10-11 13:13:38,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606596696] [2020-10-11 13:13:38,942 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:38,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:38,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626969541] [2020-10-11 13:13:38,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:38,997 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-11 13:13:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:39,155 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-11 13:13:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:39,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:39,156 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:39,157 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:39,157 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-11 13:13:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-11 13:13:39,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-11 13:13:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:39,172 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-11 13:13:39,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-11 13:13:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:39,173 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:39,173 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,380 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-11 13:13:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:39,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391561242] [2020-10-11 13:13:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391561242] [2020-10-11 13:13:39,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573309142] [2020-10-11 13:13:39,469 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:39,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:39,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:39,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:39,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540145265] [2020-10-11 13:13:39,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:39,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:39,550 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-11 13:13:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:39,720 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-11 13:13:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:39,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:39,721 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:39,721 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:39,722 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-11 13:13:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-11 13:13:39,724 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-11 13:13:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:39,724 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-11 13:13:39,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-11 13:13:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:39,725 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:39,725 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:39,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 13:13:39,926 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-11 13:13:39,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:39,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013250011] [2020-10-11 13:13:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013250011] [2020-10-11 13:13:40,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020008829] [2020-10-11 13:13:40,003 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:40,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:40,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204979087] [2020-10-11 13:13:40,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:40,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:40,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:40,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:40,057 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-11 13:13:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:40,249 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-11 13:13:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:40,251 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:40,252 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:40,252 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:40,253 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-11 13:13:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:40,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-11 13:13:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:40,255 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:40,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:40,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:40,256 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:40,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:40,457 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-11 13:13:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:40,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794091409] [2020-10-11 13:13:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794091409] [2020-10-11 13:13:40,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875120015] [2020-10-11 13:13:40,539 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:40,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:40,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:40,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382958763] [2020-10-11 13:13:40,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:40,614 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-11 13:13:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:40,849 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-11 13:13:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:40,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:40,851 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:40,851 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:40,851 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-11 13:13:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:40,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-11 13:13:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:40,855 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:40,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:40,855 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:40,856 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:41,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 13:13:41,058 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-11 13:13:41,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:41,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985923500] [2020-10-11 13:13:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985923500] [2020-10-11 13:13:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289195076] [2020-10-11 13:13:41,130 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:41,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:41,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:41,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449372273] [2020-10-11 13:13:41,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:41,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:41,202 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-11 13:13:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:41,425 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-11 13:13:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:41,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:41,426 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:41,427 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:41,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-11 13:13:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:13:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-11 13:13:41,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-11 13:13:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:41,430 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-11 13:13:41,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-11 13:13:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:41,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:41,430 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:41,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:41,631 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-11 13:13:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:41,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501939334] [2020-10-11 13:13:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501939334] [2020-10-11 13:13:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418332150] [2020-10-11 13:13:41,706 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:41,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:41,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:41,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598447031] [2020-10-11 13:13:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:41,794 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-11 13:13:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:42,112 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-11 13:13:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:42,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:42,113 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:42,113 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:13:42,113 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:13:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-11 13:13:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:42,116 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-11 13:13:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:42,117 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:42,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:42,117 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,117 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 13:13:42,325 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-11 13:13:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233117176] [2020-10-11 13:13:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233117176] [2020-10-11 13:13:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277003832] [2020-10-11 13:13:42,394 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:42,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:42,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:42,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057279236] [2020-10-11 13:13:42,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:42,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:42,459 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-11 13:13:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:42,727 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-11 13:13:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:42,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:42,728 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:13:42,729 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:13:42,729 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:13:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-11 13:13:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-11 13:13:42,733 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-11 13:13:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:42,733 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-11 13:13:42,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-11 13:13:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:42,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,734 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 13:13:42,935 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-11 13:13:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026005154] [2020-10-11 13:13:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026005154] [2020-10-11 13:13:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248226988] [2020-10-11 13:13:43,008 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:43,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:43,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:43,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:43,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291366814] [2020-10-11 13:13:43,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:43,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:43,084 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-11 13:13:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,429 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-11 13:13:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:43,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,430 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:43,431 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:43,431 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-11 13:13:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-11 13:13:43,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-11 13:13:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,434 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-11 13:13:43,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-11 13:13:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:43,435 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,435 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 13:13:43,636 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-11 13:13:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834957063] [2020-10-11 13:13:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834957063] [2020-10-11 13:13:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589940380] [2020-10-11 13:13:43,732 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:43,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:43,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455796445] [2020-10-11 13:13:43,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:43,802 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-11 13:13:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,995 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:13:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:43,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,996 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:43,997 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:43,997 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-11 13:13:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:44,000 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:44,001 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:44,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:44,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:44,002 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:44,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 13:13:44,212 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-11 13:13:44,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:44,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991816385] [2020-10-11 13:13:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991816385] [2020-10-11 13:13:44,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722114762] [2020-10-11 13:13:44,306 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:44,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:44,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:44,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:44,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515857636] [2020-10-11 13:13:44,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:44,391 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:44,648 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-11 13:13:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:44,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:44,649 INFO L225 Difference]: With dead ends: 81 [2020-10-11 13:13:44,650 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 13:13:44,650 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 13:13:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-11 13:13:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:44,653 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:44,653 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:44,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:44,654 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:44,654 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:44,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 13:13:44,856 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-11 13:13:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29766101] [2020-10-11 13:13:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29766101] [2020-10-11 13:13:44,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385969691] [2020-10-11 13:13:44,944 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:44,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:44,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:44,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9407755] [2020-10-11 13:13:44,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:44,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:44,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:44,999 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,215 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:45,216 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,216 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:45,217 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:45,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-11 13:13:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:45,220 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,221 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:45,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:45,221 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,221 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:45,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 13:13:45,431 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-11 13:13:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:45,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474263320] [2020-10-11 13:13:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474263320] [2020-10-11 13:13:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960447250] [2020-10-11 13:13:45,516 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:45,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:45,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:45,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050996382] [2020-10-11 13:13:45,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:45,596 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,916 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:45,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,918 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:45,918 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:45,918 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-11 13:13:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:45,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,921 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:45,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:45,921 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,922 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:46,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 13:13:46,122 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-11 13:13:46,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:46,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192856970] [2020-10-11 13:13:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192856970] [2020-10-11 13:13:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986685473] [2020-10-11 13:13:46,198 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:46,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401533291] [2020-10-11 13:13:46,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:46,258 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:46,518 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-11 13:13:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:46,519 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:46,520 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:46,520 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:46,521 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-11 13:13:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:46,523 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:46,524 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:46,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:46,524 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:46,524 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:46,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,733 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-11 13:13:46,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:46,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846120074] [2020-10-11 13:13:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846120074] [2020-10-11 13:13:46,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215068871] [2020-10-11 13:13:46,810 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:46,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:46,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:46,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464579230] [2020-10-11 13:13:46,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:46,891 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:47,334 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-11 13:13:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:47,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:47,335 INFO L225 Difference]: With dead ends: 73 [2020-10-11 13:13:47,335 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:13:47,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:13:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-11 13:13:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:47,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:47,340 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:47,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:47,341 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:47,341 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:47,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 13:13:47,542 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-11 13:13:47,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:47,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898525213] [2020-10-11 13:13:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898525213] [2020-10-11 13:13:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808663767] [2020-10-11 13:13:47,621 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:47,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:47,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456619039] [2020-10-11 13:13:47,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:47,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:47,674 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:47,964 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:13:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:47,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:47,966 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:47,966 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:47,967 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-11 13:13:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:13:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-11 13:13:47,971 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-11 13:13:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:47,971 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-11 13:13:47,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-11 13:13:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:47,972 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:47,972 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:48,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:48,182 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-11 13:13:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320567820] [2020-10-11 13:13:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320567820] [2020-10-11 13:13:48,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199045038] [2020-10-11 13:13:48,254 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:48,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:48,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:48,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:48,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:48,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:48,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035453701] [2020-10-11 13:13:48,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:48,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:48,337 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-11 13:13:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:48,741 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-11 13:13:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:48,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:48,743 INFO L225 Difference]: With dead ends: 70 [2020-10-11 13:13:48,743 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:48,744 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-11 13:13:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-11 13:13:48,746 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-11 13:13:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:48,747 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-11 13:13:48,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-11 13:13:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:48,747 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:48,747 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:48,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 13:13:48,948 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-11 13:13:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398083564] [2020-10-11 13:13:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398083564] [2020-10-11 13:13:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155954908] [2020-10-11 13:13:49,015 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:49,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:49,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:49,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:49,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674156945] [2020-10-11 13:13:49,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:49,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:49,087 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-11 13:13:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:49,473 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-11 13:13:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:49,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:49,474 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:49,474 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:49,474 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-11 13:13:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:49,476 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-11 13:13:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:49,477 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:49,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:49,477 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:49,477 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:49,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:49,684 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-11 13:13:49,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:49,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785945454] [2020-10-11 13:13:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785945454] [2020-10-11 13:13:49,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34087744] [2020-10-11 13:13:49,768 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:49,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:49,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:49,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860078873] [2020-10-11 13:13:49,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:49,857 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-11 13:13:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:50,267 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-11 13:13:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:50,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:50,268 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:50,268 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:50,268 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-11 13:13:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-11 13:13:50,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-11 13:13:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:50,271 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-11 13:13:50,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-11 13:13:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:50,271 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:50,271 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:50,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 13:13:50,480 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-11 13:13:50,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:50,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663673104] [2020-10-11 13:13:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663673104] [2020-10-11 13:13:50,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460220394] [2020-10-11 13:13:50,582 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:50,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:50,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:50,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032437996] [2020-10-11 13:13:50,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:50,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:50,676 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-11 13:13:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:50,901 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-11 13:13:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:50,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:50,903 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:13:50,903 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:13:50,904 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:13:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-11 13:13:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-11 13:13:50,907 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-11 13:13:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:50,908 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-11 13:13:50,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-11 13:13:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:50,909 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:50,909 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:51,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 13:13:51,120 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-11 13:13:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:51,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501680723] [2020-10-11 13:13:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501680723] [2020-10-11 13:13:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814517525] [2020-10-11 13:13:51,276 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:51,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:51,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:51,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:51,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329774800] [2020-10-11 13:13:51,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:51,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:51,389 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-11 13:13:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:51,674 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-11 13:13:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:51,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:51,676 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:13:51,676 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 13:13:51,677 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 13:13:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-11 13:13:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-11 13:13:51,680 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-11 13:13:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:51,681 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-11 13:13:51,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-11 13:13:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:51,681 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:51,682 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:51,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 13:13:51,891 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-11 13:13:51,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:51,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120777424] [2020-10-11 13:13:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120777424] [2020-10-11 13:13:51,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883855229] [2020-10-11 13:13:51,991 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:52,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742612375] [2020-10-11 13:13:52,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:52,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:52,044 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-11 13:13:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:52,285 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-11 13:13:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:52,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:52,287 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:52,287 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:52,287 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-11 13:13:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-11 13:13:52,290 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-11 13:13:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:52,290 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-11 13:13:52,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-11 13:13:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:52,291 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:52,291 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:52,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 13:13:52,492 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-11 13:13:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:52,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418427086] [2020-10-11 13:13:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418427086] [2020-10-11 13:13:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066052666] [2020-10-11 13:13:52,603 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:52,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:52,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:52,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615040014] [2020-10-11 13:13:52,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:52,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:52,678 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-11 13:13:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:52,978 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-11 13:13:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:52,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:52,980 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:52,980 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:52,981 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-11 13:13:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-11 13:13:52,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-11 13:13:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:52,983 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-11 13:13:52,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-11 13:13:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:52,984 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:52,984 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:53,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:53,185 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-11 13:13:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:53,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850365894] [2020-10-11 13:13:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850365894] [2020-10-11 13:13:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190666057] [2020-10-11 13:13:53,291 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:53,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:53,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:53,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862050522] [2020-10-11 13:13:53,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:53,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:53,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:53,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:53,354 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-11 13:13:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:53,640 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-11 13:13:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:53,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:53,642 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:53,642 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:53,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-11 13:13:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:53,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-11 13:13:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:53,646 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:53,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:53,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:53,646 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:53,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:53,854 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-11 13:13:53,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:53,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379110850] [2020-10-11 13:13:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379110850] [2020-10-11 13:13:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261592543] [2020-10-11 13:13:53,949 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:54,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:54,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:54,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:54,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:54,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:54,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240649518] [2020-10-11 13:13:54,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:54,056 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-11 13:13:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:54,515 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-11 13:13:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:54,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:54,518 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:13:54,518 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:13:54,518 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:13:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-11 13:13:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:54,522 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-11 13:13:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:54,522 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:54,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:54,524 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:54,524 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:54,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 13:13:54,734 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-11 13:13:54,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:54,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480528948] [2020-10-11 13:13:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480528948] [2020-10-11 13:13:54,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498781678] [2020-10-11 13:13:54,831 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:54,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:54,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:54,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:54,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636612258] [2020-10-11 13:13:54,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:54,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:54,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:54,926 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-11 13:13:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:55,251 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-11 13:13:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:55,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:55,252 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:55,253 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:55,253 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-11 13:13:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:13:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-11 13:13:55,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-11 13:13:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:55,256 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-11 13:13:55,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-11 13:13:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:55,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:55,256 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:55,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,465 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-11 13:13:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:55,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024347838] [2020-10-11 13:13:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024347838] [2020-10-11 13:13:55,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599949977] [2020-10-11 13:13:55,552 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:55,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:55,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:55,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100428645] [2020-10-11 13:13:55,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:55,634 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-11 13:13:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:56,065 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-11 13:13:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:56,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:56,079 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:56,079 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:56,079 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-11 13:13:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:56,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-11 13:13:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:56,081 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:56,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:56,081 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:56,081 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:56,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 13:13:56,282 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-11 13:13:56,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:56,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624872431] [2020-10-11 13:13:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624872431] [2020-10-11 13:13:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046071303] [2020-10-11 13:13:56,368 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:56,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:56,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595022595] [2020-10-11 13:13:56,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:56,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:56,424 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-11 13:13:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:56,800 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:13:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:56,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:56,802 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:13:56,802 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:13:56,802 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:13:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-11 13:13:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-11 13:13:56,805 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-11 13:13:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:56,805 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-11 13:13:56,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-11 13:13:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:56,806 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:56,806 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:57,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 13:13:57,010 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-11 13:13:57,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:57,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703454384] [2020-10-11 13:13:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703454384] [2020-10-11 13:13:57,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69307048] [2020-10-11 13:13:57,097 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:57,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:57,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:57,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898693703] [2020-10-11 13:13:57,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:57,175 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-11 13:13:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:57,639 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-11 13:13:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:57,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:57,640 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:13:57,640 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:57,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-11 13:13:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:13:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-11 13:13:57,643 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-11 13:13:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:57,643 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-11 13:13:57,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-11 13:13:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:57,644 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:57,644 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:57,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 13:13:57,844 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-11 13:13:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:57,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489094440] [2020-10-11 13:13:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489094440] [2020-10-11 13:13:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377257705] [2020-10-11 13:13:58,004 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:58,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:58,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:58,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:58,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:58,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707174049] [2020-10-11 13:13:58,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:58,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:58,093 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-11 13:13:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:58,307 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:13:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:58,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:58,309 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:13:58,309 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:13:58,310 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:13:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-11 13:13:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:58,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:58,313 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:58,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:58,314 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:58,314 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:58,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 13:13:58,524 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-11 13:13:58,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:58,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894117904] [2020-10-11 13:13:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894117904] [2020-10-11 13:13:58,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073955663] [2020-10-11 13:13:58,692 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:58,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:58,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:58,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:58,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941674422] [2020-10-11 13:13:58,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:58,795 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:59,097 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-11 13:13:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:59,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:59,098 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:13:59,098 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:13:59,099 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:13:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:13:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:59,103 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:59,103 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:59,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:59,103 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:59,103 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:59,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 13:13:59,304 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-11 13:13:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:59,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72645978] [2020-10-11 13:13:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72645978] [2020-10-11 13:13:59,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948310434] [2020-10-11 13:13:59,430 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:59,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:59,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:59,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466639251] [2020-10-11 13:13:59,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:59,486 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:59,741 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:59,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:59,743 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:59,743 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:59,743 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-11 13:13:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:59,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:59,747 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:59,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:59,748 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:59,748 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:59,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:59,953 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-11 13:13:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:59,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253475420] [2020-10-11 13:13:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253475420] [2020-10-11 13:14:00,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949477472] [2020-10-11 13:14:00,061 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:00,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:00,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:00,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478387563] [2020-10-11 13:14:00,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:00,152 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:00,518 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-11 13:14:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:00,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:00,520 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:14:00,520 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:14:00,520 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:14:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:14:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-11 13:14:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:00,523 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:00,523 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:00,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:00,524 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:00,524 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:00,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:00,733 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-11 13:14:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:00,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838025297] [2020-10-11 13:14:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838025297] [2020-10-11 13:14:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106425756] [2020-10-11 13:14:00,834 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:00,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131144887] [2020-10-11 13:14:00,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:00,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:00,900 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:01,206 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 13:14:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:01,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:01,208 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:01,208 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:01,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-11 13:14:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:01,212 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:01,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:01,212 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:01,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:01,212 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:01,213 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:01,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-11 13:14:01,421 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-11 13:14:01,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:01,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299169579] [2020-10-11 13:14:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299169579] [2020-10-11 13:14:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393375314] [2020-10-11 13:14:01,516 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:01,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:01,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:01,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:01,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679204256] [2020-10-11 13:14:01,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:01,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:01,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:01,598 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:01,990 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:14:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:01,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:01,992 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:14:01,992 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:14:01,992 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:14:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-11 13:14:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:01,995 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:01,995 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:01,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:01,996 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:01,996 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:02,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:02,204 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-11 13:14:02,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:02,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583966683] [2020-10-11 13:14:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583966683] [2020-10-11 13:14:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340257513] [2020-10-11 13:14:02,322 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:02,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:14:02,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:02,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:02,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265945536] [2020-10-11 13:14:02,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:02,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:02,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:02,381 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:02,751 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-11 13:14:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:02,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:02,752 INFO L225 Difference]: With dead ends: 80 [2020-10-11 13:14:02,753 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:14:02,753 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:14:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:14:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-11 13:14:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:02,756 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:02,756 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:02,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:02,756 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:02,756 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:02,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-11 13:14:02,957 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-11 13:14:02,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:02,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764812921] [2020-10-11 13:14:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764812921] [2020-10-11 13:14:03,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95000773] [2020-10-11 13:14:03,048 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:03,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:03,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:03,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045756286] [2020-10-11 13:14:03,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:03,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:03,164 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:03,668 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-11 13:14:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:03,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:03,669 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:14:03,670 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:14:03,670 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:14:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-11 13:14:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:03,674 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:03,674 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:03,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:03,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:03,675 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:03,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:03,879 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-11 13:14:03,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:03,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702657985] [2020-10-11 13:14:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702657985] [2020-10-11 13:14:03,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428892753] [2020-10-11 13:14:03,962 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:04,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:14:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:04,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:04,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77738594] [2020-10-11 13:14:04,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:04,027 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:04,423 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:14:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:04,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:04,425 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:04,425 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:04,425 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-11 13:14:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-11 13:14:04,429 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-11 13:14:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:04,429 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-11 13:14:04,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-11 13:14:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:04,429 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:04,430 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:04,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-11 13:14:04,636 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-11 13:14:04,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:04,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206321629] [2020-10-11 13:14:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206321629] [2020-10-11 13:14:04,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39798435] [2020-10-11 13:14:04,728 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:04,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:04,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:04,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:04,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611486536] [2020-10-11 13:14:04,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:04,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:04,797 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-11 13:14:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:05,331 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-11 13:14:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:05,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:05,332 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:14:05,332 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:14:05,333 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:14:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-11 13:14:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:14:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-11 13:14:05,335 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-11 13:14:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:05,336 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-11 13:14:05,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-11 13:14:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:05,336 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:05,336 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:05,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:05,545 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:05,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-11 13:14:05,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:05,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359577792] [2020-10-11 13:14:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359577792] [2020-10-11 13:14:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961259848] [2020-10-11 13:14:05,639 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:05,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:05,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:05,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:05,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963659191] [2020-10-11 13:14:05,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:05,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:05,745 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-11 13:14:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:06,223 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-11 13:14:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:06,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:06,224 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:06,225 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:06,225 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-11 13:14:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:14:06,227 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-11 13:14:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:06,227 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:14:06,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:14:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:06,228 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:06,228 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:06,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-11 13:14:06,436 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-11 13:14:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:06,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115738982] [2020-10-11 13:14:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115738982] [2020-10-11 13:14:06,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961099437] [2020-10-11 13:14:06,537 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:06,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:06,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:06,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:06,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70913781] [2020-10-11 13:14:06,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:06,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:06,623 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-11 13:14:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:07,170 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-11 13:14:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:07,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:07,172 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:14:07,172 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:14:07,172 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:14:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-11 13:14:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:14:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-11 13:14:07,174 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-11 13:14:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:07,175 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-11 13:14:07,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-11 13:14:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:07,175 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:07,175 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:07,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 13:14:07,383 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-11 13:14:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:07,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451052959] [2020-10-11 13:14:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451052959] [2020-10-11 13:14:07,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773904515] [2020-10-11 13:14:07,525 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:07,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:07,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:07,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:07,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105340583] [2020-10-11 13:14:07,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:07,599 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-11 13:14:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:07,838 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-11 13:14:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:14:07,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:07,840 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:07,840 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:14:07,840 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:14:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:14:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-11 13:14:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-11 13:14:07,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-11 13:14:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:07,843 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-11 13:14:07,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-11 13:14:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:07,844 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:07,844 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:08,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,045 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-11 13:14:08,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:08,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779351932] [2020-10-11 13:14:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779351932] [2020-10-11 13:14:08,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753068107] [2020-10-11 13:14:08,189 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:08,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:08,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904581733] [2020-10-11 13:14:08,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:08,275 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-11 13:14:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:08,543 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-11 13:14:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:08,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:08,544 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:08,544 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:08,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:14:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-11 13:14:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-11 13:14:08,547 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-11 13:14:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:08,548 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-11 13:14:08,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-11 13:14:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:08,548 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:08,548 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:08,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,757 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-11 13:14:08,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:08,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843426237] [2020-10-11 13:14:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843426237] [2020-10-11 13:14:08,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985700485] [2020-10-11 13:14:08,883 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:08,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:08,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441693200] [2020-10-11 13:14:08,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:08,940 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-11 13:14:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:09,256 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-11 13:14:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:09,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:09,257 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:14:09,257 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:09,258 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-11 13:14:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:14:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-11 13:14:09,260 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-11 13:14:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:09,260 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-11 13:14:09,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-11 13:14:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:09,260 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:09,260 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:09,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:09,461 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-11 13:14:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:09,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439538667] [2020-10-11 13:14:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439538667] [2020-10-11 13:14:09,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504369874] [2020-10-11 13:14:09,582 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:09,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:09,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:09,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:09,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:09,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102626104] [2020-10-11 13:14:09,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:09,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:09,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:09,678 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-11 13:14:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:10,150 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-11 13:14:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:10,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:10,153 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:10,153 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:10,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:14:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-11 13:14:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-11 13:14:10,157 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-11 13:14:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:10,157 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-11 13:14:10,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-11 13:14:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:10,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:10,159 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:10,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:10,369 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-11 13:14:10,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:10,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111565436] [2020-10-11 13:14:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111565436] [2020-10-11 13:14:10,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585211684] [2020-10-11 13:14:10,549 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:10,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:10,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862675359] [2020-10-11 13:14:10,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:10,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:10,640 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-11 13:14:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:10,970 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:14:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:10,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:10,971 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:10,971 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:10,972 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-11 13:14:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:14:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-11 13:14:10,974 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-11 13:14:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:10,974 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-11 13:14:10,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-11 13:14:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:10,975 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:10,975 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:11,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-11 13:14:11,182 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-11 13:14:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:11,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979905615] [2020-10-11 13:14:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979905615] [2020-10-11 13:14:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034589859] [2020-10-11 13:14:11,303 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:11,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:11,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:11,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:11,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325045991] [2020-10-11 13:14:11,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:11,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:11,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:11,372 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-11 13:14:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:11,799 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-11 13:14:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:11,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:11,801 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:14:11,801 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:14:11,801 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:14:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-11 13:14:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-11 13:14:11,804 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-11 13:14:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:11,804 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-11 13:14:11,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-11 13:14:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:11,805 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:11,805 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:12,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:12,006 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-11 13:14:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:12,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628719481] [2020-10-11 13:14:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628719481] [2020-10-11 13:14:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227511913] [2020-10-11 13:14:12,108 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:12,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:12,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:12,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980152807] [2020-10-11 13:14:12,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:12,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:12,178 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-11 13:14:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:12,565 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-11 13:14:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:12,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:12,567 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:14:12,567 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:14:12,568 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:14:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-11 13:14:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:12,570 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-11 13:14:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:12,570 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:12,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:12,571 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:12,571 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:12,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-11 13:14:12,772 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-11 13:14:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:12,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511447662] [2020-10-11 13:14:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511447662] [2020-10-11 13:14:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748872511] [2020-10-11 13:14:12,884 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:12,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:12,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:12,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:12,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:12,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7948161] [2020-10-11 13:14:12,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:12,973 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-11 13:14:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:13,625 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:14:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:13,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:13,627 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:13,627 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:13,628 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-11 13:14:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:13,631 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-11 13:14:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:13,632 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:13,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:13,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:13,633 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:13,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:13,842 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-11 13:14:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:13,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777108504] [2020-10-11 13:14:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777108504] [2020-10-11 13:14:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274180860] [2020-10-11 13:14:13,989 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:14,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:14,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:14,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042311871] [2020-10-11 13:14:14,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:14,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:14,091 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-11 13:14:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:14,681 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-11 13:14:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:14,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:14,683 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:14,684 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:14,684 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-11 13:14:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:14:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-11 13:14:14,688 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-11 13:14:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:14,688 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-11 13:14:14,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-11 13:14:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:14,689 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:14,689 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:14,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 13:14:14,899 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-11 13:14:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:14,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203286434] [2020-10-11 13:14:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203286434] [2020-10-11 13:14:15,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054348547] [2020-10-11 13:14:15,056 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:15,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:15,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:15,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:15,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478602020] [2020-10-11 13:14:15,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:15,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:15,179 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-11 13:14:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:15,709 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-11 13:14:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:15,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:15,711 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:15,711 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:14:15,711 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:14:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-11 13:14:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:14:15,717 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-11 13:14:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:15,717 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:14:15,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:14:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:15,718 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:15,718 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:15,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:15,925 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-11 13:14:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736966987] [2020-10-11 13:14:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736966987] [2020-10-11 13:14:16,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806616690] [2020-10-11 13:14:16,025 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:16,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337427990] [2020-10-11 13:14:16,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:16,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:16,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:16,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:16,100 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-11 13:14:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:16,584 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-11 13:14:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:16,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:16,586 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:14:16,586 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:14:16,586 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:14:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-11 13:14:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-11 13:14:16,588 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-11 13:14:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:16,588 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-11 13:14:16,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-11 13:14:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:16,589 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:16,589 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:16,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:16,793 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-11 13:14:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:16,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690869370] [2020-10-11 13:14:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690869370] [2020-10-11 13:14:16,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416905549] [2020-10-11 13:14:16,890 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:16,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:16,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:16,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:17,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165065159] [2020-10-11 13:14:17,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:17,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:17,016 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-11 13:14:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:17,591 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-11 13:14:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:17,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:17,592 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:14:17,592 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:17,592 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-11 13:14:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-11 13:14:17,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-11 13:14:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:17,594 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-11 13:14:17,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-11 13:14:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:17,595 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:17,595 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:17,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:17,800 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-11 13:14:17,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:17,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251044725] [2020-10-11 13:14:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251044725] [2020-10-11 13:14:17,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322976256] [2020-10-11 13:14:17,960 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:18,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:18,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068942822] [2020-10-11 13:14:18,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:18,018 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-11 13:14:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:18,278 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-11 13:14:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:18,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:18,279 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:18,279 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:18,280 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-11 13:14:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:18,282 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:18,282 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:18,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:18,283 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:18,283 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:18,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:18,503 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-11 13:14:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:18,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464840345] [2020-10-11 13:14:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464840345] [2020-10-11 13:14:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581915354] [2020-10-11 13:14:18,649 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:18,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:18,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:18,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:18,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611199918] [2020-10-11 13:14:18,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:18,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:18,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:18,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:18,722 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:19,073 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-11 13:14:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:19,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:19,075 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:19,075 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:19,075 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-11 13:14:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:19,078 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:19,078 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:19,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:19,079 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:19,079 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:19,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,288 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-11 13:14:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:19,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876826762] [2020-10-11 13:14:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876826762] [2020-10-11 13:14:19,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830181300] [2020-10-11 13:14:19,443 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:19,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:19,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655376106] [2020-10-11 13:14:19,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:19,505 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:19,851 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-11 13:14:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:19,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:19,853 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:14:19,853 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:14:19,853 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:14:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:14:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-11 13:14:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:19,855 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:19,855 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:19,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:19,856 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:19,856 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:20,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:20,064 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-11 13:14:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590149036] [2020-10-11 13:14:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590149036] [2020-10-11 13:14:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339362944] [2020-10-11 13:14:20,209 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:20,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:20,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43703803] [2020-10-11 13:14:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:20,285 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:20,721 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-11 13:14:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:20,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:20,723 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:14:20,723 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:14:20,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:14:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-11 13:14:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:20,727 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:20,727 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:20,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:20,728 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:20,729 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:20,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:20,938 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-11 13:14:20,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:20,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177762263] [2020-10-11 13:14:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177762263] [2020-10-11 13:14:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784638419] [2020-10-11 13:14:21,076 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:21,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:21,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542182533] [2020-10-11 13:14:21,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:21,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:21,131 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:21,522 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-11 13:14:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:21,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:21,524 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:21,524 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:21,525 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-11 13:14:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:21,527 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:21,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:21,528 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:21,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-11 13:14:21,729 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-11 13:14:21,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:21,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251933990] [2020-10-11 13:14:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251933990] [2020-10-11 13:14:21,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985276924] [2020-10-11 13:14:21,892 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:21,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:21,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:21,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:21,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488515945] [2020-10-11 13:14:21,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:21,966 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:22,491 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-11 13:14:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:22,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:22,492 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:14:22,492 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:22,493 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-11 13:14:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:22,495 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:22,496 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:22,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:22,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:22,496 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:22,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:22,697 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:22,697 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-11 13:14:22,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:22,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634679297] [2020-10-11 13:14:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634679297] [2020-10-11 13:14:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147673884] [2020-10-11 13:14:22,832 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:22,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:22,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:22,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092931906] [2020-10-11 13:14:22,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:22,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:22,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:22,895 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:23,345 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-11 13:14:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:23,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:23,347 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:23,347 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:23,348 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-11 13:14:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:23,351 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:23,351 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:23,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:23,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:23,351 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:23,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-11 13:14:23,552 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-11 13:14:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:23,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653103916] [2020-10-11 13:14:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653103916] [2020-10-11 13:14:23,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523613732] [2020-10-11 13:14:23,681 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:23,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:23,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:23,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:23,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966690372] [2020-10-11 13:14:23,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:23,756 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:24,308 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:14:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:24,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:24,309 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:24,309 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:24,310 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-11 13:14:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:24,312 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:24,312 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:24,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:24,313 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:24,313 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:24,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:24,521 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-11 13:14:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:24,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142759402] [2020-10-11 13:14:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142759402] [2020-10-11 13:14:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912686641] [2020-10-11 13:14:24,644 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:24,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:24,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:24,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480798013] [2020-10-11 13:14:24,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:24,735 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:25,231 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-11 13:14:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:25,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:25,233 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:14:25,233 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:25,233 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-11 13:14:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:25,236 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:25,236 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:25,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:25,237 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:25,237 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:25,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,446 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-11 13:14:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:25,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947092475] [2020-10-11 13:14:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947092475] [2020-10-11 13:14:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254243979] [2020-10-11 13:14:25,578 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:25,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:25,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:25,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473980952] [2020-10-11 13:14:25,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:25,658 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:26,322 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-11 13:14:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:26,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:26,324 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:14:26,324 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:26,324 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-11 13:14:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:26,327 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:26,327 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:26,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:26,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:26,328 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:26,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:26,528 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-11 13:14:26,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:26,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469942828] [2020-10-11 13:14:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469942828] [2020-10-11 13:14:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337123432] [2020-10-11 13:14:26,646 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:26,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:26,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:26,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252535398] [2020-10-11 13:14:26,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:26,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:26,712 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:27,236 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:14:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:27,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:27,237 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:27,238 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:27,238 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-11 13:14:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:14:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-11 13:14:27,240 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-11 13:14:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:27,240 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-11 13:14:27,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-11 13:14:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:27,241 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:27,241 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:27,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:27,442 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-11 13:14:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293094652] [2020-10-11 13:14:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293094652] [2020-10-11 13:14:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148279066] [2020-10-11 13:14:27,558 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:27,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:27,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:27,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:27,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:27,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509948365] [2020-10-11 13:14:27,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:27,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:27,635 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-11 13:14:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:28,310 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-11 13:14:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:28,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:28,311 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:14:28,311 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:14:28,312 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:14:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-11 13:14:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:14:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-11 13:14:28,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-11 13:14:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:28,314 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-11 13:14:28,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-11 13:14:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:28,314 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:28,314 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:28,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:28,523 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-11 13:14:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:28,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230657114] [2020-10-11 13:14:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230657114] [2020-10-11 13:14:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026655986] [2020-10-11 13:14:28,637 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:28,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:28,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:28,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:28,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986749965] [2020-10-11 13:14:28,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:28,720 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-11 13:14:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:29,345 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:14:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:29,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:29,347 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:29,347 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:29,348 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-11 13:14:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:29,350 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-11 13:14:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:29,350 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:29,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:29,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:29,351 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:29,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:29,559 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-11 13:14:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417521608] [2020-10-11 13:14:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417521608] [2020-10-11 13:14:29,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19872258] [2020-10-11 13:14:29,716 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:29,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:29,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:29,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:29,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896451897] [2020-10-11 13:14:29,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:29,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:29,832 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-11 13:14:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:30,548 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-11 13:14:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:30,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:30,550 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:30,550 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:14:30,551 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:14:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-11 13:14:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:14:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-11 13:14:30,555 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-11 13:14:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:30,556 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-11 13:14:30,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-11 13:14:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:30,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:30,557 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:30,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-11 13:14:30,768 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-11 13:14:30,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:30,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117714578] [2020-10-11 13:14:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:30,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117714578] [2020-10-11 13:14:30,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309030851] [2020-10-11 13:14:30,958 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779836640] [2020-10-11 13:14:31,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:31,016 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-11 13:14:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:31,298 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:14:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:31,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:31,299 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:31,299 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:31,300 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:14:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-11 13:14:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-11 13:14:31,302 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-11 13:14:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:31,302 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-11 13:14:31,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-11 13:14:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:31,303 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:31,303 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:31,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,504 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-11 13:14:31,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:31,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006267846] [2020-10-11 13:14:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006267846] [2020-10-11 13:14:31,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332436109] [2020-10-11 13:14:31,687 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:31,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:31,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:31,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798585492] [2020-10-11 13:14:31,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:31,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:31,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:31,774 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-11 13:14:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:32,087 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-11 13:14:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:32,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:32,089 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:14:32,089 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:14:32,089 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:14:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-11 13:14:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-11 13:14:32,091 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-11 13:14:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:32,091 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-11 13:14:32,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-11 13:14:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:32,092 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:32,092 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:32,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-11 13:14:32,293 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-11 13:14:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:32,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831307049] [2020-10-11 13:14:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:32,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831307049] [2020-10-11 13:14:32,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536678900] [2020-10-11 13:14:32,466 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:32,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:32,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:32,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468992075] [2020-10-11 13:14:32,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:32,520 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-11 13:14:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:32,909 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:14:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:32,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:32,911 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:32,911 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:32,911 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-11 13:14:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-11 13:14:32,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-11 13:14:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:32,914 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-11 13:14:32,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-11 13:14:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:32,915 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:32,915 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:33,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:33,123 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-11 13:14:33,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:33,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480269715] [2020-10-11 13:14:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480269715] [2020-10-11 13:14:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785053843] [2020-10-11 13:14:33,334 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:33,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:33,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:33,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:33,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:33,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359141943] [2020-10-11 13:14:33,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:33,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:33,448 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-11 13:14:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:33,824 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-11 13:14:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:33,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:33,826 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:33,826 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:33,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-11 13:14:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-11 13:14:33,828 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-11 13:14:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:33,828 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-11 13:14:33,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-11 13:14:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:33,829 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:33,829 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:34,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:34,036 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-11 13:14:34,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:34,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618996117] [2020-10-11 13:14:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618996117] [2020-10-11 13:14:34,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857739240] [2020-10-11 13:14:34,218 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:34,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:34,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:34,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:34,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053294174] [2020-10-11 13:14:34,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:34,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:34,281 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-11 13:14:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:34,690 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-11 13:14:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:34,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:34,692 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:34,692 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:34,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-11 13:14:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:14:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-11 13:14:34,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-11 13:14:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:34,696 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-11 13:14:34,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-11 13:14:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:34,696 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:34,696 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:34,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 13:14:34,901 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-11 13:14:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:34,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380954462] [2020-10-11 13:14:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380954462] [2020-10-11 13:14:35,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895573709] [2020-10-11 13:14:35,069 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:35,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:35,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:35,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:35,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:35,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675724084] [2020-10-11 13:14:35,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:35,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:35,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:35,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:35,160 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-11 13:14:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:35,645 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-11 13:14:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:35,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:35,647 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:14:35,647 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:14:35,647 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:14:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:14:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-11 13:14:35,650 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-11 13:14:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:35,650 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-11 13:14:35,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-11 13:14:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:35,651 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:35,651 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:35,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 13:14:35,860 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-11 13:14:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405304090] [2020-10-11 13:14:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405304090] [2020-10-11 13:14:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033245059] [2020-10-11 13:14:36,007 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:36,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:36,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:36,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009227091] [2020-10-11 13:14:36,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:36,065 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-11 13:14:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:36,534 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-11 13:14:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:36,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:36,535 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:36,535 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:36,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:14:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-11 13:14:36,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-11 13:14:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:36,539 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-11 13:14:36,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-11 13:14:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:36,540 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:36,540 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:36,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:36,748 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-11 13:14:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:36,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241106490] [2020-10-11 13:14:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241106490] [2020-10-11 13:14:36,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319178348] [2020-10-11 13:14:36,903 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:36,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:36,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:36,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:36,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909367554] [2020-10-11 13:14:36,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:36,981 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-11 13:14:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:37,544 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-11 13:14:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:37,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:37,546 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:37,546 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:37,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-11 13:14:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-11 13:14:37,549 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-11 13:14:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:37,549 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-11 13:14:37,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-11 13:14:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:37,550 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:37,550 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:37,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 13:14:37,754 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-11 13:14:37,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:37,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936616605] [2020-10-11 13:14:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:37,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936616605] [2020-10-11 13:14:37,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165729441] [2020-10-11 13:14:37,904 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:37,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:37,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:37,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:37,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979189850] [2020-10-11 13:14:37,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:37,966 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-11 13:14:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:38,474 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-11 13:14:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:38,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:38,476 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:14:38,476 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:14:38,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:14:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-11 13:14:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:38,478 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-11 13:14:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:38,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:38,479 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:38,479 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:38,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:38,679 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-11 13:14:38,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:38,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409227554] [2020-10-11 13:14:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409227554] [2020-10-11 13:14:38,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146402350] [2020-10-11 13:14:38,825 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:38,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:38,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:38,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:38,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881017992] [2020-10-11 13:14:38,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:38,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:38,908 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-11 13:14:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:39,534 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-11 13:14:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:39,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:39,535 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:14:39,535 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:14:39,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:14:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-11 13:14:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:39,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-11 13:14:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:39,538 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:39,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:39,539 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:39,539 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:39,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-11 13:14:39,740 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-11 13:14:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:39,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203722405] [2020-10-11 13:14:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203722405] [2020-10-11 13:14:39,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678619751] [2020-10-11 13:14:39,879 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:39,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:39,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668377929] [2020-10-11 13:14:39,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:39,944 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-11 13:14:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:40,499 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-11 13:14:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:40,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:40,500 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:14:40,501 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:14:40,501 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:14:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-11 13:14:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:14:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-11 13:14:40,504 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-11 13:14:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:40,504 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-11 13:14:40,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-11 13:14:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:40,504 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:40,504 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:40,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:40,706 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-11 13:14:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:40,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121374149] [2020-10-11 13:14:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121374149] [2020-10-11 13:14:40,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860156342] [2020-10-11 13:14:40,850 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:40,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:40,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:40,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:40,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137930702] [2020-10-11 13:14:40,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:40,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:40,929 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-11 13:14:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:41,683 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-11 13:14:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:41,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:41,684 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:41,685 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:14:41,685 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:14:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-11 13:14:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:41,688 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-11 13:14:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:41,689 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:41,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:41,689 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:41,689 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:41,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 13:14:41,890 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-11 13:14:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:41,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122077027] [2020-10-11 13:14:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122077027] [2020-10-11 13:14:42,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986428456] [2020-10-11 13:14:42,020 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:42,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:42,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:42,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116099122] [2020-10-11 13:14:42,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:42,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:42,087 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-11 13:14:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:42,779 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:14:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:42,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:42,781 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:14:42,781 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:14:42,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:14:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-11 13:14:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:14:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-11 13:14:42,791 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-11 13:14:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:42,791 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-11 13:14:42,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-11 13:14:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:42,792 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:42,792 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:42,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 13:14:42,993 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-11 13:14:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:42,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230277405] [2020-10-11 13:14:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230277405] [2020-10-11 13:14:43,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096545271] [2020-10-11 13:14:43,143 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:43,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:43,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:43,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:43,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:43,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230498332] [2020-10-11 13:14:43,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:43,276 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-11 13:14:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:44,146 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-11 13:14:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:14:44,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:44,148 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:44,148 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:44,148 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:14:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-11 13:14:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:14:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-11 13:14:44,150 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-11 13:14:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:44,150 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-11 13:14:44,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-11 13:14:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:44,151 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:44,151 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:44,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:44,353 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-11 13:14:44,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:44,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552408822] [2020-10-11 13:14:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552408822] [2020-10-11 13:14:44,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157592122] [2020-10-11 13:14:44,551 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:44,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:44,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316739528] [2020-10-11 13:14:44,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:44,606 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-11 13:14:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:44,947 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-11 13:14:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:44,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:44,949 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:14:44,949 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:14:44,949 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:14:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-11 13:14:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:44,952 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:44,952 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:44,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:44,952 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:44,952 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:45,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:45,156 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-11 13:14:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:45,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902437735] [2020-10-11 13:14:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902437735] [2020-10-11 13:14:45,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074036325] [2020-10-11 13:14:45,358 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:45,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:45,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:45,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:45,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833242018] [2020-10-11 13:14:45,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:45,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:45,444 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:45,873 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-11 13:14:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:45,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:45,875 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:14:45,875 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:14:45,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:14:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-11 13:14:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:45,877 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:45,877 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:45,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:45,877 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:45,877 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:46,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 13:14:46,078 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-11 13:14:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:46,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944237747] [2020-10-11 13:14:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944237747] [2020-10-11 13:14:46,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407523897] [2020-10-11 13:14:46,262 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:46,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033763223] [2020-10-11 13:14:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:46,322 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:46,722 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 13:14:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:46,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:46,724 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:14:46,724 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:14:46,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:14:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-11 13:14:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:46,727 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:46,728 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:46,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:46,728 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:46,728 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:46,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:46,937 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-11 13:14:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:46,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860604922] [2020-10-11 13:14:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860604922] [2020-10-11 13:14:47,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388797308] [2020-10-11 13:14:47,126 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:47,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:47,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:47,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:47,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:47,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818219489] [2020-10-11 13:14:47,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:47,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:47,209 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:47,726 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-11 13:14:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:47,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:47,728 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:47,728 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:47,728 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-11 13:14:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:47,730 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:47,730 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:47,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:47,731 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:47,731 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:47,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-11 13:14:47,940 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-11 13:14:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:47,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377415183] [2020-10-11 13:14:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377415183] [2020-10-11 13:14:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719320479] [2020-10-11 13:14:48,120 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:48,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:48,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:48,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:48,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:48,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:48,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153711858] [2020-10-11 13:14:48,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:48,186 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:48,635 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:14:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:48,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:48,636 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:48,636 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:48,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-11 13:14:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:48,639 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:48,639 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:48,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:48,640 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:48,640 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:48,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 13:14:48,848 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-11 13:14:48,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:48,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336076353] [2020-10-11 13:14:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336076353] [2020-10-11 13:14:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034991743] [2020-10-11 13:14:49,033 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:49,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:49,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:49,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015323417] [2020-10-11 13:14:49,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:49,113 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:49,693 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-11 13:14:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:49,694 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:49,694 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:14:49,695 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:14:49,695 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:14:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-11 13:14:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:49,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:49,697 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:49,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:49,698 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:49,698 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:49,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-11 13:14:49,906 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-11 13:14:49,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:49,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048317984] [2020-10-11 13:14:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048317984] [2020-10-11 13:14:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613962722] [2020-10-11 13:14:50,072 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:50,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:50,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:50,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796056596] [2020-10-11 13:14:50,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:50,138 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:50,678 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-11 13:14:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:50,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:50,679 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:50,679 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:14:50,680 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:14:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-11 13:14:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:50,682 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:50,683 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:50,683 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:50,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:50,884 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-11 13:14:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:50,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912587774] [2020-10-11 13:14:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912587774] [2020-10-11 13:14:51,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527498811] [2020-10-11 13:14:51,060 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:51,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:51,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:51,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:51,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:51,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769813317] [2020-10-11 13:14:51,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:51,146 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:51,813 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 13:14:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:51,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:51,815 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:51,815 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:51,815 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-11 13:14:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:51,817 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:51,817 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:51,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:51,818 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:51,818 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:52,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-11 13:14:52,019 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-11 13:14:52,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:52,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452049340] [2020-10-11 13:14:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452049340] [2020-10-11 13:14:52,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281680225] [2020-10-11 13:14:52,182 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:52,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:52,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:52,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358818260] [2020-10-11 13:14:52,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:52,250 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:52,813 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-11 13:14:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:52,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:52,814 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:14:52,814 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:14:52,815 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:14:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-11 13:14:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:52,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:52,817 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:52,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:52,818 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:52,818 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:53,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:53,020 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:53,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-11 13:14:53,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:53,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807689381] [2020-10-11 13:14:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807689381] [2020-10-11 13:14:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297635287] [2020-10-11 13:14:53,179 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:53,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:53,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:53,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:53,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027980863] [2020-10-11 13:14:53,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:53,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:53,257 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:53,997 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:14:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:53,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:53,998 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:53,999 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:53,999 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-11 13:14:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:54,001 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:54,001 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:54,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:54,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:54,002 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:54,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:54,203 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-11 13:14:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:54,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747658409] [2020-10-11 13:14:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:54,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747658409] [2020-10-11 13:14:54,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168618101] [2020-10-11 13:14:54,357 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:54,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:54,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:54,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:54,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:54,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367283706] [2020-10-11 13:14:54,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:54,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:54,429 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:55,052 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:14:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:55,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:55,053 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:55,053 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:14:55,054 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:14:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-11 13:14:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:55,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:55,056 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:55,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:55,057 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:55,057 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:55,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:55,266 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-11 13:14:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:55,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366311529] [2020-10-11 13:14:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:55,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366311529] [2020-10-11 13:14:55,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331718230] [2020-10-11 13:14:55,419 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:55,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:55,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:55,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717909699] [2020-10-11 13:14:55,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:55,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:55,551 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:56,541 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-11 13:14:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:14:56,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:56,542 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:14:56,542 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:56,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:14:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-11 13:14:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:56,544 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:56,545 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:56,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:56,545 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:56,545 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:56,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:56,752 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-11 13:14:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:56,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460293054] [2020-10-11 13:14:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460293054] [2020-10-11 13:14:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877131141] [2020-10-11 13:14:56,937 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:57,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:57,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520075484] [2020-10-11 13:14:57,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:57,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:57,004 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:57,665 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:14:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:57,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:57,666 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:57,666 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:57,667 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:14:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-11 13:14:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:14:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-11 13:14:57,668 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-11 13:14:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:57,669 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-11 13:14:57,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-11 13:14:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:57,669 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:57,669 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:57,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 13:14:57,876 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-11 13:14:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:57,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477771521] [2020-10-11 13:14:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477771521] [2020-10-11 13:14:58,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811509833] [2020-10-11 13:14:58,026 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:58,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:58,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:58,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:58,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:58,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26064392] [2020-10-11 13:14:58,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:58,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:58,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:58,105 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-11 13:14:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:58,959 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-11 13:14:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:14:58,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:58,960 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:14:58,960 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:58,960 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:14:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-11 13:14:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-11 13:14:58,962 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-11 13:14:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:58,962 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-11 13:14:58,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-11 13:14:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:58,963 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:58,963 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:59,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-11 13:14:59,164 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-11 13:14:59,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:59,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140164993] [2020-10-11 13:14:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140164993] [2020-10-11 13:14:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005524332] [2020-10-11 13:14:59,314 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:59,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:59,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:59,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:59,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505726380] [2020-10-11 13:14:59,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:59,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:59,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:59,400 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-11 13:15:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:00,197 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-11 13:15:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:00,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:00,198 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:15:00,198 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:15:00,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:15:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-11 13:15:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:15:00,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-11 13:15:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:00,201 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:15:00,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:15:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:00,202 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:00,202 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:00,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 13:15:00,402 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-11 13:15:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:00,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096661389] [2020-10-11 13:15:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096661389] [2020-10-11 13:15:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479977823] [2020-10-11 13:15:00,573 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:00,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:00,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:00,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157304574] [2020-10-11 13:15:00,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:00,667 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-11 13:15:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:01,551 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-11 13:15:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:01,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:01,552 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:15:01,552 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:15:01,552 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:15:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-11 13:15:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:15:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-11 13:15:01,555 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-11 13:15:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:01,555 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-11 13:15:01,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-11 13:15:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:01,556 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:01,556 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:01,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 13:15:01,757 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-11 13:15:01,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:01,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274096154] [2020-10-11 13:15:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:01,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274096154] [2020-10-11 13:15:01,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365020646] [2020-10-11 13:15:01,978 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:02,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:02,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813819053] [2020-10-11 13:15:02,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:02,050 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-11 13:15:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:02,430 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-11 13:15:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:15:02,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:02,431 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:15:02,431 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:15:02,431 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:15:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:15:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-11 13:15:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:15:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-11 13:15:02,433 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-11 13:15:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:02,434 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-11 13:15:02,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-11 13:15:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:02,435 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:02,435 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:02,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:02,638 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-11 13:15:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:02,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118927018] [2020-10-11 13:15:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118927018] [2020-10-11 13:15:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722220814] [2020-10-11 13:15:02,869 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:02,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:02,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:02,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191299727] [2020-10-11 13:15:02,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:02,948 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-11 13:15:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:03,337 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-11 13:15:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:15:03,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:03,338 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:15:03,339 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:15:03,339 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:15:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:15:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:15:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:15:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-11 13:15:03,342 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-11 13:15:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:03,342 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-11 13:15:03,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-11 13:15:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:03,343 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:03,343 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:03,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-11 13:15:03,546 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:03,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-11 13:15:03,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:03,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607784849] [2020-10-11 13:15:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607784849] [2020-10-11 13:15:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746876813] [2020-10-11 13:15:03,764 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:03,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73278991] [2020-10-11 13:15:03,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:03,821 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-11 13:15:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:04,279 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-11 13:15:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:04,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:04,281 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:15:04,281 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:04,281 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:15:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:15:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:15:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-11 13:15:04,283 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-11 13:15:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-11 13:15:04,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-11 13:15:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:04,284 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:04,284 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:04,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 13:15:04,490 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-11 13:15:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:04,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427931617] [2020-10-11 13:15:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427931617] [2020-10-11 13:15:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614057224] [2020-10-11 13:15:04,734 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:04,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:04,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:04,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:04,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:04,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129632379] [2020-10-11 13:15:04,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:04,814 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-11 13:15:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:05,335 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-11 13:15:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:05,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:05,337 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:05,337 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:05,338 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-11 13:15:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:15:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-11 13:15:05,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-11 13:15:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:05,340 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-11 13:15:05,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-11 13:15:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:05,341 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:05,341 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:05,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-11 13:15:05,548 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-11 13:15:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:05,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849963756] [2020-10-11 13:15:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849963756] [2020-10-11 13:15:05,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378323006] [2020-10-11 13:15:05,739 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:05,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:05,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:05,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403822942] [2020-10-11 13:15:05,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:05,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:05,804 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-11 13:15:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:06,288 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-11 13:15:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:06,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:06,288 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:06,289 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:06,289 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-11 13:15:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:15:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-11 13:15:06,290 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-11 13:15:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:06,291 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-11 13:15:06,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-11 13:15:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:06,291 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:06,291 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:06,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:06,496 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-11 13:15:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:06,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951337282] [2020-10-11 13:15:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951337282] [2020-10-11 13:15:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318914966] [2020-10-11 13:15:06,702 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:06,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:06,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:06,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:06,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:06,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136701929] [2020-10-11 13:15:06,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:06,779 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-11 13:15:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:07,361 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-11 13:15:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:07,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:07,363 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:15:07,363 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:15:07,363 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:15:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-11 13:15:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:15:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-11 13:15:07,365 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-11 13:15:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:07,366 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-11 13:15:07,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-11 13:15:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:07,366 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:07,366 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:07,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:07,568 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-11 13:15:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:07,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709753215] [2020-10-11 13:15:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709753215] [2020-10-11 13:15:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666743857] [2020-10-11 13:15:07,761 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:07,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:07,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:07,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:07,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:07,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977588575] [2020-10-11 13:15:07,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:07,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:07,829 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-11 13:15:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:08,372 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-11 13:15:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:08,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:08,373 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:08,373 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:15:08,373 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:15:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-11 13:15:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:15:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-11 13:15:08,375 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-11 13:15:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:08,375 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-11 13:15:08,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-11 13:15:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:08,375 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:08,375 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:08,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:08,576 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-11 13:15:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:08,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706330818] [2020-10-11 13:15:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:08,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706330818] [2020-10-11 13:15:08,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714094938] [2020-10-11 13:15:08,791 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:08,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:08,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:08,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:08,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:08,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949131709] [2020-10-11 13:15:08,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:08,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:08,915 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-11 13:15:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:09,562 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-11 13:15:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:09,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:09,563 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:09,563 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:09,563 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-11 13:15:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-11 13:15:09,565 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-11 13:15:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:09,565 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-11 13:15:09,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-11 13:15:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:09,566 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:09,566 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:09,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 13:15:09,770 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-11 13:15:09,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:09,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153675559] [2020-10-11 13:15:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:09,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153675559] [2020-10-11 13:15:09,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752007936] [2020-10-11 13:15:09,953 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:10,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:10,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:10,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135765766] [2020-10-11 13:15:10,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:10,018 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-11 13:15:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:10,629 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-11 13:15:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:10,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:10,630 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:15:10,631 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:10,631 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-11 13:15:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:15:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-11 13:15:10,633 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-11 13:15:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:10,634 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-11 13:15:10,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-11 13:15:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:10,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:10,634 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:10,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:10,842 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-11 13:15:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:10,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843046422] [2020-10-11 13:15:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843046422] [2020-10-11 13:15:11,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770158550] [2020-10-11 13:15:11,027 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:11,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:11,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603840231] [2020-10-11 13:15:11,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:11,109 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-11 13:15:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:11,838 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-11 13:15:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:11,839 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:11,839 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:15:11,839 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:15:11,840 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:15:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-11 13:15:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:15:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-11 13:15:11,842 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-11 13:15:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:11,842 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-11 13:15:11,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-11 13:15:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:11,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:11,842 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:12,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 13:15:12,044 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-11 13:15:12,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:12,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661238033] [2020-10-11 13:15:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661238033] [2020-10-11 13:15:12,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389386148] [2020-10-11 13:15:12,222 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:12,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:12,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:12,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492378537] [2020-10-11 13:15:12,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:12,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:12,290 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-11 13:15:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:12,941 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-11 13:15:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:12,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:12,942 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:12,943 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:12,943 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-11 13:15:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:12,945 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-11 13:15:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:12,945 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:12,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:12,946 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:12,946 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:13,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 13:15:13,148 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:13,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-11 13:15:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:13,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080674115] [2020-10-11 13:15:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080674115] [2020-10-11 13:15:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424825183] [2020-10-11 13:15:13,333 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:13,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:13,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:13,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:13,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:13,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:13,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584121560] [2020-10-11 13:15:13,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:13,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:13,415 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-11 13:15:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:14,223 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-11 13:15:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:14,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:14,224 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:15:14,224 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:15:14,225 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:15:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-11 13:15:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:14,227 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-11 13:15:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:14,227 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:14,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:14,228 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:14,228 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:14,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-11 13:15:14,428 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:14,429 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-11 13:15:14,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:14,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546888175] [2020-10-11 13:15:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546888175] [2020-10-11 13:15:14,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152825406] [2020-10-11 13:15:14,602 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:14,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:14,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:14,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:14,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:14,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:14,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89532527] [2020-10-11 13:15:14,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:14,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:14,676 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-11 13:15:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:15,508 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-11 13:15:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:15,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:15,509 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:15:15,509 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:15:15,510 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:15:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-11 13:15:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:15:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-11 13:15:15,512 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-11 13:15:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:15,512 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-11 13:15:15,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-11 13:15:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:15,513 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:15,513 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:15,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:15,714 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-11 13:15:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:15,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134506727] [2020-10-11 13:15:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:15,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134506727] [2020-10-11 13:15:15,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595227172] [2020-10-11 13:15:15,887 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:15,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:15,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:15,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:15,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450846053] [2020-10-11 13:15:15,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:15,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:15,971 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-11 13:15:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:16,904 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-11 13:15:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:16,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:16,905 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:16,905 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:15:16,906 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:15:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-11 13:15:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:15:16,909 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-11 13:15:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:16,909 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:15:16,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:15:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:16,910 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:16,910 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:17,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 13:15:17,120 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-11 13:15:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:17,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014225325] [2020-10-11 13:15:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014225325] [2020-10-11 13:15:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433475102] [2020-10-11 13:15:17,292 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:17,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:17,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113137584] [2020-10-11 13:15:17,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:17,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:17,355 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-11 13:15:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:18,117 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-11 13:15:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:18,118 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:18,119 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:15:18,119 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:15:18,120 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:15:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-11 13:15:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-11 13:15:18,122 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-11 13:15:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:18,122 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-11 13:15:18,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-11 13:15:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:18,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:18,123 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:18,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:18,323 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-11 13:15:18,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:18,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948341940] [2020-10-11 13:15:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948341940] [2020-10-11 13:15:18,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738530373] [2020-10-11 13:15:18,492 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:18,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:18,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:18,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:18,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311032866] [2020-10-11 13:15:18,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:18,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:18,573 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-11 13:15:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:19,498 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-11 13:15:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:19,499 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:19,499 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:15:19,499 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:19,500 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-11 13:15:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:15:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-11 13:15:19,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-11 13:15:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:19,501 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-11 13:15:19,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-11 13:15:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:19,502 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:19,502 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:19,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:19,703 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-11 13:15:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:19,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758665903] [2020-10-11 13:15:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:19,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758665903] [2020-10-11 13:15:19,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599978149] [2020-10-11 13:15:19,957 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:20,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:20,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146800414] [2020-10-11 13:15:20,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:20,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:20,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:20,022 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-11 13:15:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:20,445 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-11 13:15:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:15:20,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:20,447 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:15:20,447 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:15:20,447 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:15:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:15:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-11 13:15:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:20,449 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:20,449 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:20,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:20,450 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:20,450 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:20,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:20,653 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-11 13:15:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657165185] [2020-10-11 13:15:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657165185] [2020-10-11 13:15:20,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471273059] [2020-10-11 13:15:20,908 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:20,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:20,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:20,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:20,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:20,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4694837] [2020-10-11 13:15:20,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:20,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:20,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:20,987 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:21,523 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:15:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:21,524 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:21,524 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:15:21,525 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:15:21,525 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:15:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-11 13:15:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:21,527 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:21,530 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:21,530 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:21,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:21,735 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-11 13:15:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:21,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746585953] [2020-10-11 13:15:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:21,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746585953] [2020-10-11 13:15:21,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419992481] [2020-10-11 13:15:21,973 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:22,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:22,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:22,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:22,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:22,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967452516] [2020-10-11 13:15:22,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:22,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:22,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:22,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:22,044 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:22,555 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:15:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:22,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:22,557 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:15:22,557 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:15:22,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:15:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-11 13:15:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:22,559 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:22,560 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:22,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:22,560 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:22,561 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:22,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:22,761 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:22,762 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-11 13:15:22,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:22,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105725955] [2020-10-11 13:15:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105725955] [2020-10-11 13:15:23,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485835681] [2020-10-11 13:15:23,009 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:23,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:23,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:23,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136780869] [2020-10-11 13:15:23,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:23,096 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:23,705 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-11 13:15:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:23,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:23,706 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:23,706 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:15:23,707 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:15:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-11 13:15:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:23,709 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:23,709 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:23,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:23,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:23,710 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:23,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 13:15:23,911 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-11 13:15:23,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:23,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106844826] [2020-10-11 13:15:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106844826] [2020-10-11 13:15:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547974222] [2020-10-11 13:15:24,148 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005321585] [2020-10-11 13:15:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:24,207 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:24,753 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-11 13:15:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:24,753 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:24,754 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:24,754 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:24,754 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-11 13:15:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:24,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:24,757 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:24,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:24,757 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:24,757 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:24,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 13:15:24,961 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-11 13:15:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:24,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321975332] [2020-10-11 13:15:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321975332] [2020-10-11 13:15:25,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010531113] [2020-10-11 13:15:25,188 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:25,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:25,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:25,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:25,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720968372] [2020-10-11 13:15:25,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:25,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:25,267 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:25,966 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-11 13:15:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:25,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:25,968 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:25,968 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:25,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-11 13:15:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:25,971 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:25,971 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:25,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:25,972 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:25,972 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:26,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 13:15:26,181 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-11 13:15:26,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:26,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096981731] [2020-10-11 13:15:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096981731] [2020-10-11 13:15:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604123205] [2020-10-11 13:15:26,397 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:26,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:26,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:26,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:26,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715829275] [2020-10-11 13:15:26,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:26,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:26,472 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:27,086 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-11 13:15:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:27,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:27,088 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:15:27,088 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:15:27,088 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:15:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-11 13:15:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:27,090 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:27,090 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:27,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:27,091 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:27,091 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:27,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 13:15:27,292 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-11 13:15:27,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:27,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601106504] [2020-10-11 13:15:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601106504] [2020-10-11 13:15:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478705512] [2020-10-11 13:15:27,515 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:27,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:27,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:27,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:27,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:27,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050564857] [2020-10-11 13:15:27,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:27,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:27,603 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:28,397 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-11 13:15:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:28,397 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:28,398 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:15:28,398 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:28,398 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-11 13:15:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:28,401 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:28,401 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:28,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:28,401 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:28,401 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:28,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:28,602 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-11 13:15:28,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:28,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451096810] [2020-10-11 13:15:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:28,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451096810] [2020-10-11 13:15:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704919228] [2020-10-11 13:15:28,815 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:28,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:28,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:28,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:28,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335850036] [2020-10-11 13:15:28,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:28,892 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:29,577 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-11 13:15:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:29,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:29,579 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:15:29,579 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:15:29,579 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:15:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-11 13:15:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:29,581 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:29,581 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:29,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:29,582 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:29,582 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:29,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-11 13:15:29,783 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-11 13:15:29,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:29,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489932405] [2020-10-11 13:15:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:29,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489932405] [2020-10-11 13:15:29,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392739333] [2020-10-11 13:15:29,994 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:30,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:30,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:30,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:30,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:30,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966345761] [2020-10-11 13:15:30,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:30,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:30,080 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:30,966 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-11 13:15:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:30,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:30,967 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:15:30,967 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:15:30,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:15:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-11 13:15:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:30,969 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:30,970 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:30,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:30,970 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:30,970 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:31,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:31,171 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-11 13:15:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:31,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762556766] [2020-10-11 13:15:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:31,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762556766] [2020-10-11 13:15:31,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397198447] [2020-10-11 13:15:31,373 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:31,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:31,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:31,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264398883] [2020-10-11 13:15:31,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:31,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:31,442 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:32,175 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-11 13:15:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:32,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:32,177 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:15:32,177 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:15:32,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:15:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-11 13:15:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:32,179 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:32,179 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:32,180 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:32,180 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:32,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:32,381 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-11 13:15:32,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:32,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267493845] [2020-10-11 13:15:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267493845] [2020-10-11 13:15:32,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069129089] [2020-10-11 13:15:32,579 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:32,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:32,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:32,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:32,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853725391] [2020-10-11 13:15:32,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:32,663 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:33,642 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:15:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:33,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:33,644 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:15:33,644 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:15:33,644 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:15:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-11 13:15:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:33,646 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:33,646 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:33,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:33,647 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:33,648 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:33,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-11 13:15:33,848 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-11 13:15:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:33,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373516443] [2020-10-11 13:15:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373516443] [2020-10-11 13:15:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482209593] [2020-10-11 13:15:34,049 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:34,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:34,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:34,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:34,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656893461] [2020-10-11 13:15:34,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:34,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:34,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:34,120 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:34,926 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-11 13:15:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:34,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:34,928 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:15:34,928 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:15:34,928 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:15:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-11 13:15:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:34,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:34,931 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:34,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:34,931 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:34,931 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:35,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:35,132 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-11 13:15:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:35,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100984406] [2020-10-11 13:15:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:35,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100984406] [2020-10-11 13:15:35,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799329225] [2020-10-11 13:15:35,329 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:35,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:35,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:35,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:35,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:35,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:35,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:35,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525157342] [2020-10-11 13:15:35,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:35,414 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:36,475 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-11 13:15:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:36,476 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:36,477 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:15:36,477 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:15:36,477 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:15:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-11 13:15:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:36,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:36,480 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:36,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:36,480 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:36,480 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:36,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 13:15:36,681 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-11 13:15:36,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:36,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497251886] [2020-10-11 13:15:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497251886] [2020-10-11 13:15:36,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226910327] [2020-10-11 13:15:36,885 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:36,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:36,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:36,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387679791] [2020-10-11 13:15:36,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:36,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:36,953 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:37,812 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-11 13:15:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:37,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:37,813 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:37,814 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:37,814 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-11 13:15:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:15:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-11 13:15:37,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-11 13:15:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:37,816 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-11 13:15:37,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-11 13:15:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:37,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:37,817 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:38,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 13:15:38,018 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-11 13:15:38,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:38,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428930311] [2020-10-11 13:15:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:38,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428930311] [2020-10-11 13:15:38,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861426231] [2020-10-11 13:15:38,213 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:38,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:38,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:38,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:38,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:38,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:38,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161671238] [2020-10-11 13:15:38,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:38,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:38,313 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-11 13:15:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:39,429 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-11 13:15:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:15:39,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:39,430 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:15:39,430 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:15:39,431 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:15:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-11 13:15:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:15:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-11 13:15:39,432 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-11 13:15:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-11 13:15:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-11 13:15:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:39,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:39,433 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:39,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 13:15:39,634 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-11 13:15:39,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:39,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928374636] [2020-10-11 13:15:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928374636] [2020-10-11 13:15:39,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116998710] [2020-10-11 13:15:39,822 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:39,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:39,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383468079] [2020-10-11 13:15:39,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:39,915 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-11 13:15:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:40,948 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:15:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:40,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:40,949 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:40,949 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:40,949 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-11 13:15:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:15:40,951 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-11 13:15:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:40,952 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:15:40,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:15:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:40,952 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:40,952 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:41,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 13:15:41,153 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-11 13:15:41,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:41,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693380736] [2020-10-11 13:15:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693380736] [2020-10-11 13:15:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948128602] [2020-10-11 13:15:41,363 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:41,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:41,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:41,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:41,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13062221] [2020-10-11 13:15:41,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:41,460 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-11 13:15:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:42,582 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-11 13:15:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:42,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:42,584 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:15:42,584 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:15:42,584 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:15:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:15:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:15:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:15:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-11 13:15:42,586 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-11 13:15:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:42,586 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-11 13:15:42,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-11 13:15:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:42,587 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:42,587 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:42,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:42,790 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-11 13:15:42,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:42,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500762546] [2020-10-11 13:15:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500762546] [2020-10-11 13:15:43,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153397516] [2020-10-11 13:15:43,072 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:43,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:43,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758201] [2020-10-11 13:15:43,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:43,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:43,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:43,136 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-11 13:15:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:43,619 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-11 13:15:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:15:43,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:43,620 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:15:43,620 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:15:43,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:15:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:15:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-11 13:15:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-11 13:15:43,623 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-11 13:15:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:43,623 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-11 13:15:43,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-11 13:15:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:43,623 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:43,623 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:43,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:43,824 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-11 13:15:43,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:43,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826415142] [2020-10-11 13:15:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826415142] [2020-10-11 13:15:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581900663] [2020-10-11 13:15:44,107 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:44,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:44,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:44,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:44,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366845758] [2020-10-11 13:15:44,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:44,192 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-11 13:15:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:44,704 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-11 13:15:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:44,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:44,706 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:44,706 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:44,706 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-11 13:15:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:15:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-11 13:15:44,708 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-11 13:15:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:44,708 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-11 13:15:44,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-11 13:15:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:44,709 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:44,709 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:44,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:44,910 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-11 13:15:44,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:44,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159845133] [2020-10-11 13:15:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159845133] [2020-10-11 13:15:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57835762] [2020-10-11 13:15:45,188 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:45,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:45,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:45,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454961205] [2020-10-11 13:15:45,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:45,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:45,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:45,254 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-11 13:15:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:45,799 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-11 13:15:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:45,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:45,801 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:15:45,801 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:45,801 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-11 13:15:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:15:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-11 13:15:45,804 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-11 13:15:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:45,804 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-11 13:15:45,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-11 13:15:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:45,804 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:45,804 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:46,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:46,005 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:46,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-11 13:15:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:46,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84629378] [2020-10-11 13:15:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84629378] [2020-10-11 13:15:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542206615] [2020-10-11 13:15:46,293 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:46,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:46,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:46,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:46,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36958717] [2020-10-11 13:15:46,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:46,380 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-11 13:15:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:46,968 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-11 13:15:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:46,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:46,969 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:15:46,969 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:15:46,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:15:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-11 13:15:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-11 13:15:46,971 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-11 13:15:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:46,971 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-11 13:15:46,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-11 13:15:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:46,971 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:46,971 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:47,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:47,172 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-11 13:15:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:47,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162813485] [2020-10-11 13:15:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:47,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162813485] [2020-10-11 13:15:47,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465164311] [2020-10-11 13:15:47,442 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:47,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:47,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435365717] [2020-10-11 13:15:47,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:47,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:47,501 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-11 13:15:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:48,116 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-11 13:15:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:48,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:48,117 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:15:48,118 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:15:48,118 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:15:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-11 13:15:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:15:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-11 13:15:48,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-11 13:15:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:48,119 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-11 13:15:48,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-11 13:15:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:48,120 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:48,120 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:48,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:48,321 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-11 13:15:48,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:48,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335907982] [2020-10-11 13:15:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335907982] [2020-10-11 13:15:48,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470300625] [2020-10-11 13:15:48,592 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:48,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:48,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:48,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:48,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:48,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220515274] [2020-10-11 13:15:48,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:48,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:48,681 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-11 13:15:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:49,377 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-11 13:15:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:49,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:49,379 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:15:49,379 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:15:49,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:15:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-11 13:15:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:15:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-11 13:15:49,382 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-11 13:15:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:49,382 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-11 13:15:49,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-11 13:15:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:49,383 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:49,383 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:49,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:49,589 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-11 13:15:49,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:49,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51628309] [2020-10-11 13:15:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51628309] [2020-10-11 13:15:49,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995170093] [2020-10-11 13:15:49,850 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:49,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:49,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012600075] [2020-10-11 13:15:49,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:49,923 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-11 13:15:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:50,592 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-11 13:15:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:50,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:50,594 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:15:50,594 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:15:50,594 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:15:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-11 13:15:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-11 13:15:50,597 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-11 13:15:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:50,598 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-11 13:15:50,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-11 13:15:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:50,598 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:50,598 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:50,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 13:15:50,799 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-11 13:15:50,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:50,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813124111] [2020-10-11 13:15:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:51,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813124111] [2020-10-11 13:15:51,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034687573] [2020-10-11 13:15:51,053 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:51,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:51,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:51,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:51,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:51,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404380207] [2020-10-11 13:15:51,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:51,139 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-11 13:15:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:51,930 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-11 13:15:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:51,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:51,931 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:15:51,931 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:15:51,931 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:15:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-11 13:15:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-11 13:15:51,933 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-11 13:15:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:51,934 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-11 13:15:51,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-11 13:15:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:51,934 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:51,934 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:52,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 13:15:52,135 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-11 13:15:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:52,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059984335] [2020-10-11 13:15:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:52,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059984335] [2020-10-11 13:15:52,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210384411] [2020-10-11 13:15:52,370 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:52,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:52,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:52,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466086739] [2020-10-11 13:15:52,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:52,439 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-11 13:15:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:53,385 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-11 13:15:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:53,387 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:53,388 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:15:53,388 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:15:53,388 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:15:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-11 13:15:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:15:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-11 13:15:53,392 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-11 13:15:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:53,392 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-11 13:15:53,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-11 13:15:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:53,393 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:53,393 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:53,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 13:15:53,603 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-11 13:15:53,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:53,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177577146] [2020-10-11 13:15:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177577146] [2020-10-11 13:15:53,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29684207] [2020-10-11 13:15:53,982 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:54,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:54,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:54,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:54,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:54,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184638961] [2020-10-11 13:15:54,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:54,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:54,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:54,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:54,137 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-11 13:15:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:55,437 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-11 13:15:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:55,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:55,440 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:15:55,440 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:15:55,440 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:15:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-11 13:15:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-11 13:15:55,444 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-11 13:15:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:55,444 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-11 13:15:55,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-11 13:15:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:55,445 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:55,445 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:55,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 13:15:55,655 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:55,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:55,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-11 13:15:55,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:55,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083599841] [2020-10-11 13:15:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083599841] [2020-10-11 13:15:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308444726] [2020-10-11 13:15:55,992 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:56,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665692084] [2020-10-11 13:15:56,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:56,107 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-11 13:15:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:57,053 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 13:15:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:57,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:57,055 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:15:57,055 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:15:57,055 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:15:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-11 13:15:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:15:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-11 13:15:57,057 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-11 13:15:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:57,058 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-11 13:15:57,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-11 13:15:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:57,058 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:57,058 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:57,259 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-11 13:15:57,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:57,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520587370] [2020-10-11 13:15:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:57,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520587370] [2020-10-11 13:15:57,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684586243] [2020-10-11 13:15:57,495 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:57,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:57,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:57,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:57,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:57,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624016936] [2020-10-11 13:15:57,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:57,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:57,581 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-11 13:15:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:58,551 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-11 13:15:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:58,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:58,552 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:15:58,552 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:15:58,553 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:15:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-11 13:15:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:15:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-11 13:15:58,555 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-11 13:15:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:58,555 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-11 13:15:58,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-11 13:15:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:58,555 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:58,555 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:58,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:58,756 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-11 13:15:58,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:58,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919122965] [2020-10-11 13:15:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919122965] [2020-10-11 13:15:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72684178] [2020-10-11 13:15:58,990 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:59,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:59,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:59,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:59,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185179396] [2020-10-11 13:15:59,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:59,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:59,067 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-11 13:15:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:59,938 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:15:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:59,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:59,939 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:15:59,939 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:15:59,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:15:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-11 13:15:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:59,942 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-11 13:15:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:59,942 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:59,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:59,943 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:59,943 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:00,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-11 13:16:00,143 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-11 13:16:00,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:00,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834196502] [2020-10-11 13:16:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834196502] [2020-10-11 13:16:00,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587706409] [2020-10-11 13:16:00,393 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:00,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:00,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:00,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:00,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404068851] [2020-10-11 13:16:00,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:00,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:00,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:00,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:00,489 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-11 13:16:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:01,546 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:16:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:01,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:01,547 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:16:01,547 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:16:01,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:16:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-11 13:16:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:16:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:16:01,550 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-11 13:16:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:01,550 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:16:01,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:16:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:01,550 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:01,550 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:01,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:01,751 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-11 13:16:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:01,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968707828] [2020-10-11 13:16:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:01,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968707828] [2020-10-11 13:16:01,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109011116] [2020-10-11 13:16:01,973 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:02,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:02,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:02,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:02,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:02,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708618918] [2020-10-11 13:16:02,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:02,044 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-11 13:16:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:02,967 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-11 13:16:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:02,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:02,968 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:02,968 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:02,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-11 13:16:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:16:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-11 13:16:02,970 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-11 13:16:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:02,970 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-11 13:16:02,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-11 13:16:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:02,970 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:02,970 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:03,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:03,171 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:03,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-11 13:16:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:03,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117814490] [2020-10-11 13:16:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117814490] [2020-10-11 13:16:03,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330944351] [2020-10-11 13:16:03,399 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:03,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:03,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:03,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:03,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742613001] [2020-10-11 13:16:03,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:03,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:03,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:03,507 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-11 13:16:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:04,689 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-11 13:16:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:04,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:04,690 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:04,690 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:16:04,691 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:16:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-11 13:16:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:16:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:16:04,693 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-11 13:16:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:04,693 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:16:04,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:16:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:04,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:04,694 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:04,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:04,894 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-11 13:16:04,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:04,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081496092] [2020-10-11 13:16:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081496092] [2020-10-11 13:16:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592377662] [2020-10-11 13:16:05,125 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:05,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:05,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005959489] [2020-10-11 13:16:05,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:05,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:05,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:05,194 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-11 13:16:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:06,190 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-11 13:16:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:06,191 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:06,191 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:16:06,192 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:16:06,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:16:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-11 13:16:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-11 13:16:06,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-11 13:16:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:06,194 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-11 13:16:06,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-11 13:16:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:06,195 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:06,195 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:06,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:06,403 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:06,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-11 13:16:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:06,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142947549] [2020-10-11 13:16:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:06,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142947549] [2020-10-11 13:16:06,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243901866] [2020-10-11 13:16:06,614 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:06,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:06,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:06,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:06,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:06,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:06,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565568977] [2020-10-11 13:16:06,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:06,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:06,704 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-11 13:16:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:07,959 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-11 13:16:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:07,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:07,960 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:16:07,961 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:16:07,961 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:16:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-11 13:16:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:16:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-11 13:16:07,963 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-11 13:16:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:07,963 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-11 13:16:07,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-11 13:16:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:07,964 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:07,964 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:08,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:08,172 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-11 13:16:08,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:08,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349881323] [2020-10-11 13:16:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349881323] [2020-10-11 13:16:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103196418] [2020-10-11 13:16:08,495 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:08,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:08,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:08,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:08,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711302882] [2020-10-11 13:16:08,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:08,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:08,560 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-11 13:16:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:09,125 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-11 13:16:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:16:09,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:09,127 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:16:09,127 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:16:09,128 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:16:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:16:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-11 13:16:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:09,130 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:09,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:09,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:09,131 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:09,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-11 13:16:09,332 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-11 13:16:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:09,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843420960] [2020-10-11 13:16:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:09,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843420960] [2020-10-11 13:16:09,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743177676] [2020-10-11 13:16:09,668 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:09,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:09,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:09,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:09,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965506284] [2020-10-11 13:16:09,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:09,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:09,752 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:10,415 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-11 13:16:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:10,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:10,416 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:16:10,416 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:16:10,416 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:16:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-11 13:16:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:10,418 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:10,418 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:10,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:10,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:10,419 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:10,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 13:16:10,619 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-11 13:16:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:10,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963405235] [2020-10-11 13:16:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:10,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963405235] [2020-10-11 13:16:10,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343069038] [2020-10-11 13:16:10,931 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:10,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:10,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:11,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:11,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:11,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129121516] [2020-10-11 13:16:11,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:11,009 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:11,642 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-11 13:16:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:16:11,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:11,644 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:16:11,644 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:16:11,644 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:16:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:16:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-11 13:16:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:11,646 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:11,647 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:11,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:11,647 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:11,647 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:11,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:11,848 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-11 13:16:11,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:11,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577763558] [2020-10-11 13:16:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577763558] [2020-10-11 13:16:12,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475471142] [2020-10-11 13:16:12,165 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:12,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:12,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:12,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884501898] [2020-10-11 13:16:12,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:12,258 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:13,024 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-11 13:16:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:13,025 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:13,026 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:16:13,026 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:16:13,026 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:16:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:16:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-11 13:16:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:13,029 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:13,029 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:13,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:13,029 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:13,029 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:13,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-11 13:16:13,230 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-11 13:16:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:13,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322283080] [2020-10-11 13:16:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322283080] [2020-10-11 13:16:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075631502] [2020-10-11 13:16:13,533 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:13,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:13,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285899052] [2020-10-11 13:16:13,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:13,603 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:14,323 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-11 13:16:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:14,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:14,325 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:16:14,325 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:16:14,330 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:16:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-11 13:16:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:14,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:14,332 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:14,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:14,332 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:14,333 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:14,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:14,533 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-11 13:16:14,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:14,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706082183] [2020-10-11 13:16:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706082183] [2020-10-11 13:16:14,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810206617] [2020-10-11 13:16:14,827 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:14,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:14,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:14,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:14,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825770902] [2020-10-11 13:16:14,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:14,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:14,915 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:15,772 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-11 13:16:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:15,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:15,774 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:16:15,774 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:15,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:15,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-11 13:16:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:15,776 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:15,776 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:15,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:15,776 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:15,776 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:15,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:15,977 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-11 13:16:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236738364] [2020-10-11 13:16:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236738364] [2020-10-11 13:16:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586226141] [2020-10-11 13:16:16,262 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:16,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:16,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:16,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529967947] [2020-10-11 13:16:16,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:16,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:16,334 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:17,098 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:16:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:17,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:17,099 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:16:17,099 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:16:17,100 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:16:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-11 13:16:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:17,102 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:17,102 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:17,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:17,102 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:17,102 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:17,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:17,303 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-11 13:16:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:17,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818335121] [2020-10-11 13:16:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818335121] [2020-10-11 13:16:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467316930] [2020-10-11 13:16:17,597 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:17,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:17,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:17,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:17,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:17,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:17,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351134988] [2020-10-11 13:16:17,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:17,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:17,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:17,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:17,687 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:18,869 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-11 13:16:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:18,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:18,870 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:18,871 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:18,871 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-11 13:16:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:18,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:18,873 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:18,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:18,874 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:18,874 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:19,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:19,080 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-11 13:16:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919093893] [2020-10-11 13:16:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919093893] [2020-10-11 13:16:19,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380520478] [2020-10-11 13:16:19,357 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:19,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:19,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:19,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280211092] [2020-10-11 13:16:19,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:19,433 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:20,275 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-11 13:16:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:16:20,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:20,276 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:20,276 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:16:20,277 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:16:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-11 13:16:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:20,279 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:20,279 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:20,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:20,280 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:20,280 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:20,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-11 13:16:20,481 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-11 13:16:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:20,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954915756] [2020-10-11 13:16:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:20,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954915756] [2020-10-11 13:16:20,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791353645] [2020-10-11 13:16:20,758 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:20,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:20,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:20,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:20,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702892410] [2020-10-11 13:16:20,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:20,853 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:21,913 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-11 13:16:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:16:21,913 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:21,914 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:16:21,914 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:16:21,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:16:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-11 13:16:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:21,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:21,918 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:21,918 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:22,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:22,126 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-11 13:16:22,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:22,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530386597] [2020-10-11 13:16:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:22,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530386597] [2020-10-11 13:16:22,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148456868] [2020-10-11 13:16:22,393 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:22,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:22,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711233824] [2020-10-11 13:16:22,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:22,458 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:23,407 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-11 13:16:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:16:23,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:23,409 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:16:23,409 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:16:23,409 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:16:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:16:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-11 13:16:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:23,412 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:23,412 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:23,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:23,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:23,412 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:23,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-11 13:16:23,613 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-11 13:16:23,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:23,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385978986] [2020-10-11 13:16:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:23,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385978986] [2020-10-11 13:16:23,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396134872] [2020-10-11 13:16:23,876 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:23,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:23,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:23,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:23,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:23,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472507200] [2020-10-11 13:16:23,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:23,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:23,971 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:25,147 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-11 13:16:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:25,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:25,148 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:16:25,149 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:16:25,149 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:16:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-11 13:16:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:25,151 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:25,151 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:25,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:25,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:25,152 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:25,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 13:16:25,353 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-11 13:16:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982624103] [2020-10-11 13:16:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:25,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982624103] [2020-10-11 13:16:25,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010888202] [2020-10-11 13:16:25,624 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:25,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:25,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:25,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:25,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133276262] [2020-10-11 13:16:25,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:25,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:25,705 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:26,695 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:16:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:26,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:26,696 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:16:26,696 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:16:26,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:16:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-11 13:16:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:26,699 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:26,699 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:26,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:26,700 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:26,700 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:26,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:26,905 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:26,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-11 13:16:26,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:26,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384266393] [2020-10-11 13:16:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:27,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384266393] [2020-10-11 13:16:27,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538864159] [2020-10-11 13:16:27,171 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:27,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:27,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:27,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:27,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:27,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580505187] [2020-10-11 13:16:27,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:27,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:27,264 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:28,547 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:16:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:28,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:28,548 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:16:28,548 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:16:28,549 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:16:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-11 13:16:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:28,553 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:28,553 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:28,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:28,554 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:28,554 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:28,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:28,758 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-11 13:16:28,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:28,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350301530] [2020-10-11 13:16:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350301530] [2020-10-11 13:16:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557883213] [2020-10-11 13:16:29,024 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:29,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:29,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:29,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583139555] [2020-10-11 13:16:29,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:29,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:29,099 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:30,162 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-11 13:16:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:30,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:30,164 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:16:30,164 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:16:30,165 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:16:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-11 13:16:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:30,167 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:30,167 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:30,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:30,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:30,167 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:30,368 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-11 13:16:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:30,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487341246] [2020-10-11 13:16:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:30,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487341246] [2020-10-11 13:16:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263789338] [2020-10-11 13:16:30,629 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:30,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:30,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:30,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:30,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804824056] [2020-10-11 13:16:30,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:30,734 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:32,127 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-11 13:16:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:32,128 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:32,128 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:16:32,129 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:16:32,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:16:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:16:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-11 13:16:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:32,131 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:32,131 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:32,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:32,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:32,132 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:32,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-11 13:16:32,338 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-11 13:16:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:32,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187629683] [2020-10-11 13:16:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187629683] [2020-10-11 13:16:32,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965802865] [2020-10-11 13:16:32,602 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:32,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950040007] [2020-10-11 13:16:32,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:32,677 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:33,810 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-11 13:16:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:33,811 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:33,811 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:33,811 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:33,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-11 13:16:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:16:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-11 13:16:33,814 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-11 13:16:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:33,815 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-11 13:16:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-11 13:16:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:33,815 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:33,815 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:34,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:34,019 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:34,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-11 13:16:34,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:34,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098332278] [2020-10-11 13:16:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:34,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098332278] [2020-10-11 13:16:34,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647776361] [2020-10-11 13:16:34,288 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:34,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:34,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:34,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:34,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:34,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:34,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:34,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575685136] [2020-10-11 13:16:34,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:34,382 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-11 13:16:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:35,819 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-11 13:16:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:16:35,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:35,820 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:16:35,820 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:16:35,821 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:16:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-11 13:16:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:16:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-11 13:16:35,823 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-11 13:16:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:35,823 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-11 13:16:35,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-11 13:16:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:35,823 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:35,823 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:36,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:36,024 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-11 13:16:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:36,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351591657] [2020-10-11 13:16:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351591657] [2020-10-11 13:16:36,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435003380] [2020-10-11 13:16:36,284 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:36,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:36,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:36,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:36,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:36,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979676229] [2020-10-11 13:16:36,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:36,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:36,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:36,407 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-11 13:16:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:37,864 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-11 13:16:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:37,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:37,865 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:37,865 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:16:37,866 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:16:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-11 13:16:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:16:37,868 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-11 13:16:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:16:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:16:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:37,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:37,869 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:38,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:38,070 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-11 13:16:38,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:38,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968881919] [2020-10-11 13:16:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968881919] [2020-10-11 13:16:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913280338] [2020-10-11 13:16:38,360 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:38,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:38,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:38,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:38,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285607187] [2020-10-11 13:16:38,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:38,459 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-11 13:16:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:39,911 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-11 13:16:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:39,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:39,912 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:16:39,912 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:16:39,912 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:16:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:16:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-11 13:16:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:16:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-11 13:16:39,915 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-11 13:16:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:39,915 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-11 13:16:39,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-11 13:16:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:39,915 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:39,915 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:40,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:40,116 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-11 13:16:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:40,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545108221] [2020-10-11 13:16:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:40,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545108221] [2020-10-11 13:16:40,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3478698] [2020-10-11 13:16:40,496 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:40,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:40,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:40,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453604094] [2020-10-11 13:16:40,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:40,559 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-11 13:16:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:41,154 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-11 13:16:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:16:41,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:41,156 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:16:41,156 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:16:41,156 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:16:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:16:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-11 13:16:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-11 13:16:41,158 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-11 13:16:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:41,158 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-11 13:16:41,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-11 13:16:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:41,159 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:41,159 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:41,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-11 13:16:41,360 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-11 13:16:41,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:41,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128816412] [2020-10-11 13:16:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128816412] [2020-10-11 13:16:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226850394] [2020-10-11 13:16:41,756 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:41,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:41,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:41,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:41,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:41,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410725023] [2020-10-11 13:16:41,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:41,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:41,846 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-11 13:16:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:42,507 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-11 13:16:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:42,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:42,508 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:16:42,508 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:16:42,509 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:16:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-11 13:16:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:16:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-11 13:16:42,511 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-11 13:16:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:42,511 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-11 13:16:42,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-11 13:16:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:42,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:42,512 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 13:16:42,712 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-11 13:16:42,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:42,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888580394] [2020-10-11 13:16:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888580394] [2020-10-11 13:16:43,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119224135] [2020-10-11 13:16:43,094 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436697173] [2020-10-11 13:16:43,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:43,154 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-11 13:16:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:43,868 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-11 13:16:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:43,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:43,870 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:16:43,870 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:43,871 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-11 13:16:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:16:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-11 13:16:43,873 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-11 13:16:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:43,873 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-11 13:16:43,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-11 13:16:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:43,874 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:43,874 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:44,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 13:16:44,075 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-11 13:16:44,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:44,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471817639] [2020-10-11 13:16:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:44,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471817639] [2020-10-11 13:16:44,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082655791] [2020-10-11 13:16:44,449 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:44,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:44,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:44,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:44,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446750518] [2020-10-11 13:16:44,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:44,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:44,539 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-11 13:16:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:45,308 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-11 13:16:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:45,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:45,310 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:16:45,310 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:16:45,310 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:16:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-11 13:16:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-11 13:16:45,313 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-11 13:16:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:45,313 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-11 13:16:45,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-11 13:16:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:45,314 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:45,314 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:45,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 13:16:45,521 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-11 13:16:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:45,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440525316] [2020-10-11 13:16:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440525316] [2020-10-11 13:16:45,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094632356] [2020-10-11 13:16:45,875 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:45,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:45,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616945685] [2020-10-11 13:16:45,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:45,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:45,950 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-11 13:16:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:46,755 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-11 13:16:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:46,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:46,757 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:16:46,757 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:16:46,757 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:16:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-11 13:16:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:16:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-11 13:16:46,760 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-11 13:16:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:46,761 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-11 13:16:46,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-11 13:16:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:46,761 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:46,761 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:46,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:46,962 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-11 13:16:46,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:46,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640263253] [2020-10-11 13:16:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:47,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640263253] [2020-10-11 13:16:47,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294391325] [2020-10-11 13:16:47,332 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:47,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:47,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:47,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:47,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:47,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924272409] [2020-10-11 13:16:47,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:47,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:47,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:47,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:47,420 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-11 13:16:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:48,311 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-11 13:16:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:48,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:48,313 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:16:48,313 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:16:48,313 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:16:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-11 13:16:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:16:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-11 13:16:48,314 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-11 13:16:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:48,315 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-11 13:16:48,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-11 13:16:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:48,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:48,315 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:48,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 13:16:48,516 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:48,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-11 13:16:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:48,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795608069] [2020-10-11 13:16:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:48,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795608069] [2020-10-11 13:16:48,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213704738] [2020-10-11 13:16:48,945 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:48,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:49,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:49,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:49,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109851926] [2020-10-11 13:16:49,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:49,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:49,022 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-11 13:16:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:49,911 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-11 13:16:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:16:49,912 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:49,912 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:16:49,912 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:16:49,913 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:16:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-11 13:16:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:16:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-11 13:16:49,916 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-11 13:16:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:49,916 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-11 13:16:49,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-11 13:16:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:49,916 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:49,916 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:50,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:50,117 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-11 13:16:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:50,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881800972] [2020-10-11 13:16:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:50,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881800972] [2020-10-11 13:16:50,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962651707] [2020-10-11 13:16:50,469 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:50,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:50,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:50,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:50,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:50,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536422517] [2020-10-11 13:16:50,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:50,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:50,568 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-11 13:16:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:51,556 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-11 13:16:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:51,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:51,557 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:16:51,557 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:16:51,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:16:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:16:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-11 13:16:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:16:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-11 13:16:51,560 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-11 13:16:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:51,560 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-11 13:16:51,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-11 13:16:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:51,561 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:51,561 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:51,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-11 13:16:51,765 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:51,765 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-11 13:16:51,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:51,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955382365] [2020-10-11 13:16:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955382365] [2020-10-11 13:16:52,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518910131] [2020-10-11 13:16:52,091 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:52,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:52,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:52,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:52,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023504998] [2020-10-11 13:16:52,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:52,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:52,169 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-11 13:16:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:53,111 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-11 13:16:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:16:53,112 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:53,112 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:16:53,112 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:16:53,113 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:16:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-11 13:16:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:16:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-11 13:16:53,115 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-11 13:16:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:53,115 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-11 13:16:53,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-11 13:16:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:53,116 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:53,116 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:53,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:53,316 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-11 13:16:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:53,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266686313] [2020-10-11 13:16:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:53,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266686313] [2020-10-11 13:16:53,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212667868] [2020-10-11 13:16:53,649 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:53,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:53,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:53,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:53,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:53,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811532144] [2020-10-11 13:16:53,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:53,744 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-11 13:16:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:54,852 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-11 13:16:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:16:54,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:54,853 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:16:54,853 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:16:54,854 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:16:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-11 13:16:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:16:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-11 13:16:54,855 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-11 13:16:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:54,856 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-11 13:16:54,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-11 13:16:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:54,856 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:54,856 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:55,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:55,057 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-11 13:16:55,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:55,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307019370] [2020-10-11 13:16:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:55,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307019370] [2020-10-11 13:16:55,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829675859] [2020-10-11 13:16:55,382 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:55,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:55,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:55,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:55,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:55,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088454557] [2020-10-11 13:16:55,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:55,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:55,460 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-11 13:16:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:56,466 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-11 13:16:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:56,467 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:56,467 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:16:56,467 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:16:56,468 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:16:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-11 13:16:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:16:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-11 13:16:56,470 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-11 13:16:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:56,470 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-11 13:16:56,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-11 13:16:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:56,471 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:56,471 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:56,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:56,671 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-11 13:16:56,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:56,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862934758] [2020-10-11 13:16:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862934758] [2020-10-11 13:16:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131357636] [2020-10-11 13:16:57,008 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:57,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:57,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:57,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:57,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918655739] [2020-10-11 13:16:57,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:57,109 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-11 13:16:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:58,320 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-11 13:16:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:58,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:58,321 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:16:58,321 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:16:58,321 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:16:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-11 13:16:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:16:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-11 13:16:58,328 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-11 13:16:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:58,328 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-11 13:16:58,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-11 13:16:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:58,328 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:58,329 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:58,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:58,529 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-11 13:16:58,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:58,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526068483] [2020-10-11 13:16:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:58,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526068483] [2020-10-11 13:16:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229268308] [2020-10-11 13:16:58,845 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:58,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:58,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:58,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:58,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025973002] [2020-10-11 13:16:58,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:58,932 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-11 13:17:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:00,027 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-11 13:17:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:17:00,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:00,029 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:17:00,029 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:17:00,029 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:17:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:17:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-11 13:17:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:17:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-11 13:17:00,034 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-11 13:17:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:00,034 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-11 13:17:00,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-11 13:17:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:00,035 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:00,035 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:00,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 13:17:00,244 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-11 13:17:00,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:00,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738691475] [2020-10-11 13:17:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738691475] [2020-10-11 13:17:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918481376] [2020-10-11 13:17:00,572 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:00,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:00,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:00,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:00,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:00,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:00,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611421977] [2020-10-11 13:17:00,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:00,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:00,675 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-11 13:17:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:02,011 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-11 13:17:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:17:02,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:02,012 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:17:02,012 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:17:02,013 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:17:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:17:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-11 13:17:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:17:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-11 13:17:02,015 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-11 13:17:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:02,015 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-11 13:17:02,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-11 13:17:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:02,015 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:02,015 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:02,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-11 13:17:02,216 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-11 13:17:02,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:02,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786531451] [2020-10-11 13:17:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786531451] [2020-10-11 13:17:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928066896] [2020-10-11 13:17:02,518 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180473232] [2020-10-11 13:17:02,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:02,593 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-11 13:17:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:03,774 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-11 13:17:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:17:03,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:03,775 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:17:03,776 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:17:03,776 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:17:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:17:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-11 13:17:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:17:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:17:03,778 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-11 13:17:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:03,778 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:17:03,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:17:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:03,779 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:03,779 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:03,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 13:17:03,980 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-11 13:17:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:03,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437018604] [2020-10-11 13:17:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:04,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437018604] [2020-10-11 13:17:04,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785537915] [2020-10-11 13:17:04,296 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:04,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:04,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:04,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:04,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018585210] [2020-10-11 13:17:04,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:04,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:04,390 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-11 13:17:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:05,873 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-11 13:17:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:17:05,874 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:05,875 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:17:05,875 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:17:05,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:17:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:17:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-11 13:17:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:17:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:17:05,877 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-11 13:17:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:05,877 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:17:05,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:17:05,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:05,878 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:05,878 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 13:17:06,079 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-11 13:17:06,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:06,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122945669] [2020-10-11 13:17:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122945669] [2020-10-11 13:17:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656765401] [2020-10-11 13:17:06,394 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:06,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:06,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:06,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775737449] [2020-10-11 13:17:06,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:06,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:06,478 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-11 13:17:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:07,765 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-11 13:17:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:17:07,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:07,767 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:17:07,767 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:17:07,767 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:17:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:17:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-11 13:17:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:17:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-11 13:17:07,770 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-11 13:17:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:07,770 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-11 13:17:07,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-11 13:17:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:07,770 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:07,770 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:07,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:07,971 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:07,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-11 13:17:07,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:07,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792088948] [2020-10-11 13:17:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792088948] [2020-10-11 13:17:08,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529033756] [2020-10-11 13:17:08,270 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:08,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:08,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:08,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586617400] [2020-10-11 13:17:08,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:08,374 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-11 13:17:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:09,966 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-11 13:17:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:17:09,967 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:09,968 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:17:09,968 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:17:09,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:17:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:17:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-11 13:17:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:17:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:17:09,974 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-11 13:17:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:09,974 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:17:09,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:17:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:09,974 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:09,974 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:10,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 13:17:10,175 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-11 13:17:10,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:10,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440616832] [2020-10-11 13:17:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:10,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440616832] [2020-10-11 13:17:10,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042097833] [2020-10-11 13:17:10,495 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:10,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:10,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:10,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:10,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777899294] [2020-10-11 13:17:10,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:10,580 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-11 13:17:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:11,934 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-11 13:17:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:17:11,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:11,935 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:17:11,935 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:17:11,936 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:17:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:17:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-11 13:17:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:17:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-11 13:17:11,939 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-11 13:17:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:11,939 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-11 13:17:11,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-11 13:17:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:11,940 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:11,940 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:12,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:12,146 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-11 13:17:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:12,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430216824] [2020-10-11 13:17:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:12,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430216824] [2020-10-11 13:17:12,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438653165] [2020-10-11 13:17:12,463 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:12,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:12,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:12,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:12,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774576547] [2020-10-11 13:17:12,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:12,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:12,572 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-11 13:17:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:14,199 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-11 13:17:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:17:14,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:14,200 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:17:14,200 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:17:14,200 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:17:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:17:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-11 13:17:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:17:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-11 13:17:14,202 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-11 13:17:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:14,203 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-11 13:17:14,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-11 13:17:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:14,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:14,203 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:14,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-11 13:17:14,404 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-11 13:17:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:14,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131280636] [2020-10-11 13:17:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 13:17:14,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 13:17:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 13:17:14,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 13:17:14,455 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 13:17:14,455 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 13:17:14,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-11 13:17:14,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 01:17:14 BasicIcfg [2020-10-11 13:17:14,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 13:17:14,552 INFO L168 Benchmark]: Toolchain (without parser) took 233080.80 ms. Allocated memory was 250.6 MB in the beginning and 256.9 MB in the end (delta: 6.3 MB). Free memory was 205.7 MB in the beginning and 220.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:14,552 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:17:14,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.18 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 205.7 MB in the beginning and 267.4 MB in the end (delta: -61.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:14,553 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 312.0 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:17:14,554 INFO L168 Benchmark]: Boogie Preprocessor took 32.27 ms. Allocated memory is still 312.0 MB. Free memory was 267.4 MB in the beginning and 264.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:14,554 INFO L168 Benchmark]: RCFGBuilder took 352.49 ms. Allocated memory is still 312.0 MB. Free memory was 264.9 MB in the beginning and 242.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:14,554 INFO L168 Benchmark]: TraceAbstraction took 231969.37 ms. Allocated memory was 312.0 MB in the beginning and 256.9 MB in the end (delta: -55.1 MB). Free memory was 242.9 MB in the beginning and 220.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 45.1 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:14,557 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 665.18 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 205.7 MB in the beginning and 267.4 MB in the end (delta: -61.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 312.0 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.27 ms. Allocated memory is still 312.0 MB. Free memory was 267.4 MB in the beginning and 264.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 352.49 ms. Allocated memory is still 312.0 MB. Free memory was 264.9 MB in the beginning and 242.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 231969.37 ms. Allocated memory was 312.0 MB in the beginning and 256.9 MB in the end (delta: -55.1 MB). Free memory was 242.9 MB in the beginning and 220.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 45.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 231.7s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 129.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12305 SDslu, 22147 SDs, 0 SdLazy, 24060 SolverSat, 13833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11878 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75950 ImplicationChecksByTransitivity, 132.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 218 MinimizatonAttempts, 5507 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 43.2s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 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 proved your program to be incorrect! Received shutdown request...