/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:29:55,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:29:55,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:29:55,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:29:55,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:29:55,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:29:55,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:29:55,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:29:55,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:29:55,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:29:55,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:29:55,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:29:55,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:29:55,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:29:55,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:29:55,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:29:55,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:29:55,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:29:55,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:29:55,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:29:55,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:29:55,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:29:55,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:29:55,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:29:55,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 13:29:55,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 13:29:55,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 13:29:55,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 13:29:55,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 13:29:55,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 13:29:55,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:29:55,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:29:55,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:29:55,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:29:55,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:29:55,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:29:55,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:29:55,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:29:55,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:29:55,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:29:55,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:29:55,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-11-09 13:29:55,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:29:55,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:29:55,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:29:55,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:29:55,893 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:29:55,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:29:55,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:29:55,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:29:55,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:29:55,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:29:55,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:29:55,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:29:55,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:29:55,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:29:55,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:29:55,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:29:55,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:29:55,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:29:55,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:29:55,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:29:55,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:29:55,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:55,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 13:29:55,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:29:56,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:29:56,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:29:56,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:29:56,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:29:56,342 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:29:56,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 13:29:56,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b634498e9/a662f8b6c5184d4cbc78d98bedc737e1/FLAGaf57e6538 [2020-11-09 13:29:57,042 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:29:57,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 13:29:57,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b634498e9/a662f8b6c5184d4cbc78d98bedc737e1/FLAGaf57e6538 [2020-11-09 13:29:57,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b634498e9/a662f8b6c5184d4cbc78d98bedc737e1 [2020-11-09 13:29:57,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:29:57,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:29:57,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:57,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:29:57,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:29:57,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:57" (1/1) ... [2020-11-09 13:29:57,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429a70f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:57, skipping insertion in model container [2020-11-09 13:29:57,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:57" (1/1) ... [2020-11-09 13:29:57,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:29:57,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:29:57,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:57,829 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:29:57,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:58,052 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:29:58,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58 WrapperNode [2020-11-09 13:29:58,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:58,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:58,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:29:58,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:29:58,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:58,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:29:58,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:29:58,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:29:58,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:29:58,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:29:58,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:29:58,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:29:58,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 13:29:58,223 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 13:29:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 13:29:58,223 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:29:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 13:29:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:29:58,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:29:58,227 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:29:58,642 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:29:58,642 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 13:29:58,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:58 BoogieIcfgContainer [2020-11-09 13:29:58,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:29:58,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:29:58,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:29:58,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:29:58,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:29:57" (1/3) ... [2020-11-09 13:29:58,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ef7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:58, skipping insertion in model container [2020-11-09 13:29:58,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58" (2/3) ... [2020-11-09 13:29:58,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ef7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:58, skipping insertion in model container [2020-11-09 13:29:58,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:58" (3/3) ... [2020-11-09 13:29:58,653 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-11-09 13:29:58,669 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:29:58,669 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:29:58,673 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:29:58,674 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:29:58,710 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,710 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,711 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,711 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,712 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,712 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,712 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,712 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,716 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,716 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,718 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,730 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,731 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,731 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,731 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,731 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,732 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,732 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,732 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,732 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,733 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,733 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,733 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,734 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,735 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,735 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,735 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,736 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,736 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,736 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,736 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,737 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,737 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,740 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,742 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,742 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,751 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:58,756 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 13:29:58,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 13:29:58,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:29:58,810 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:29:58,810 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 13:29:58,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:29:58,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:29:58,811 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:29:58,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:29:58,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:29:58,826 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 13:29:58,827 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:58,831 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:58,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:58,901 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 13:29:58,902 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 13:29:58,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 13:29:58,914 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 13:30:01,549 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:30:01,793 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:30:02,906 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:03,050 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:03,386 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:03,548 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:04,119 WARN L194 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:04,325 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:04,754 WARN L194 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:04,953 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:05,009 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 13:30:05,009 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 13:30:05,015 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 13:30:05,024 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 13:30:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 13:30:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 13:30:05,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,033 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 13:30:05,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181367648] [2020-11-09 13:30:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181367648] [2020-11-09 13:30:05,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:05,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 13:30:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35393149] [2020-11-09 13:30:05,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 13:30:05,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 13:30:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 13:30:05,282 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 13:30:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,372 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 13:30:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:30:05,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 13:30:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,385 INFO L225 Difference]: With dead ends: 75 [2020-11-09 13:30:05,385 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 13:30:05,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 13:30:05,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 13:30:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 13:30:05,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 13:30:05,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,439 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 13:30:05,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 13:30:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 13:30:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:30:05,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:30:05,441 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 13:30:05,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97133055] [2020-11-09 13:30:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97133055] [2020-11-09 13:30:05,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:05,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:30:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970198922] [2020-11-09 13:30:05,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:30:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:30:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:05,569 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 13:30:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,634 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 13:30:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:30:05,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 13:30:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,637 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:05,637 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:05,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 13:30:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 13:30:05,655 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 13:30:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,658 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 13:30:05,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:30:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 13:30:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 13:30:05,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 13:30:05,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781506019] [2020-11-09 13:30:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781506019] [2020-11-09 13:30:05,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:05,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661537411] [2020-11-09 13:30:05,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:05,829 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 13:30:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,964 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 13:30:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:05,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,966 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:30:05,967 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 13:30:05,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 13:30:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 13:30:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 13:30:05,974 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 13:30:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,975 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 13:30:05,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 13:30:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:05,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 13:30:05,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 13:30:05,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960447101] [2020-11-09 13:30:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960447101] [2020-11-09 13:30:06,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:06,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731931985] [2020-11-09 13:30:06,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:06,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:06,118 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 13:30:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,270 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 13:30:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:06,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,273 INFO L225 Difference]: With dead ends: 59 [2020-11-09 13:30:06,273 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 13:30:06,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 13:30:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 13:30:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 13:30:06,284 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 13:30:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,285 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 13:30:06,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 13:30:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:06,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 13:30:06,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 13:30:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485082901] [2020-11-09 13:30:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485082901] [2020-11-09 13:30:06,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593340807] [2020-11-09 13:30:06,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:06,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:06,368 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 13:30:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,479 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 13:30:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:06,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,481 INFO L225 Difference]: With dead ends: 65 [2020-11-09 13:30:06,481 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 13:30:06,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 13:30:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 13:30:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 13:30:06,488 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 13:30:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,488 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 13:30:06,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 13:30:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:06,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 13:30:06,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 13:30:06,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088863481] [2020-11-09 13:30:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088863481] [2020-11-09 13:30:06,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660923509] [2020-11-09 13:30:06,581 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 [2020-11-09 13:30:06,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:06,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472778916] [2020-11-09 13:30:06,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:06,771 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 13:30:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,083 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 13:30:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:07,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,085 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:07,085 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:30:07,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:30:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 13:30:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 13:30:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 13:30:07,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 13:30:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,091 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 13:30:07,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 13:30:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:07,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,092 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:07,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:30:07,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 13:30:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:07,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669680853] [2020-11-09 13:30:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669680853] [2020-11-09 13:30:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108042652] [2020-11-09 13:30:07,426 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 [2020-11-09 13:30:07,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:07,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:07,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404173362] [2020-11-09 13:30:07,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:07,599 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 13:30:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,803 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 13:30:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:07,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,806 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:07,807 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 13:30:07,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 13:30:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 13:30:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 13:30:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 13:30:07,815 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 13:30:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,816 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 13:30:07,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 13:30:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:07,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,018 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 13:30:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413223835] [2020-11-09 13:30:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413223835] [2020-11-09 13:30:08,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858808641] [2020-11-09 13:30:08,172 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 [2020-11-09 13:30:08,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 13:30:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 13:30:08,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275671478] [2020-11-09 13:30:08,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:08,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:08,352 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 13:30:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:08,557 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 13:30:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:30:08,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 13:30:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:08,558 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:08,558 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:08,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 13:30:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:30:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 13:30:08,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 13:30:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:08,568 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 13:30:08,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 13:30:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:08,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:08,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,784 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 13:30:08,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713327028] [2020-11-09 13:30:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713327028] [2020-11-09 13:30:08,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728654393] [2020-11-09 13:30:08,883 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 [2020-11-09 13:30:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:09,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320556254] [2020-11-09 13:30:09,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:09,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:09,046 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 13:30:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,386 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 13:30:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:09,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,388 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:09,388 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:09,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 13:30:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:09,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 13:30:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,397 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:09,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:09,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:09,610 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 13:30:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37659691] [2020-11-09 13:30:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37659691] [2020-11-09 13:30:09,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564665343] [2020-11-09 13:30:09,723 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 [2020-11-09 13:30:09,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:09,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:09,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347831843] [2020-11-09 13:30:09,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:09,883 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 13:30:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,183 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 13:30:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:10,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,189 INFO L225 Difference]: With dead ends: 71 [2020-11-09 13:30:10,189 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 13:30:10,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 13:30:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 13:30:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 13:30:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 13:30:10,202 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 13:30:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,202 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 13:30:10,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 13:30:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,204 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:10,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 13:30:10,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:10,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 13:30:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:10,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716790294] [2020-11-09 13:30:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716790294] [2020-11-09 13:30:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692655955] [2020-11-09 13:30:10,526 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 [2020-11-09 13:30:10,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:30:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:10,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073708234] [2020-11-09 13:30:10,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:10,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:10,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:10,694 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 13:30:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,224 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 13:30:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:11,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,227 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:11,227 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 13:30:11,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 13:30:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 13:30:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:11,232 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 13:30:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,232 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:11,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:11,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,233 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:11,445 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 13:30:11,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898863135] [2020-11-09 13:30:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898863135] [2020-11-09 13:30:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570361289] [2020-11-09 13:30:11,555 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 [2020-11-09 13:30:11,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:11,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:11,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048066526] [2020-11-09 13:30:11,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:11,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:11,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:11,733 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 13:30:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,112 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 13:30:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:12,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,114 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:12,114 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 13:30:12,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 13:30:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 13:30:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 13:30:12,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 13:30:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,128 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 13:30:12,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 13:30:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:12,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:12,331 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 13:30:12,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548561532] [2020-11-09 13:30:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548561532] [2020-11-09 13:30:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459071180] [2020-11-09 13:30:12,522 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 [2020-11-09 13:30:12,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 13:30:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 13:30:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739762070] [2020-11-09 13:30:12,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:12,652 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 13:30:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,948 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 13:30:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:12,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 13:30:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,950 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:12,950 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:12,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 13:30:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 13:30:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 13:30:12,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 13:30:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,961 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 13:30:12,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 13:30:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:12,961 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,962 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:13,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:30:13,163 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 13:30:13,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:13,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421131134] [2020-11-09 13:30:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421131134] [2020-11-09 13:30:13,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614804206] [2020-11-09 13:30:13,318 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 [2020-11-09 13:30:13,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 13:30:13,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:13,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:13,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466006698] [2020-11-09 13:30:13,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:13,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:13,520 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 13:30:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:14,067 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 13:30:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:14,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:14,068 INFO L225 Difference]: With dead ends: 73 [2020-11-09 13:30:14,068 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 13:30:14,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 13:30:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 13:30:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:14,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 13:30:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:14,074 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:14,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:14,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:14,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:14,279 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 13:30:14,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025784657] [2020-11-09 13:30:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025784657] [2020-11-09 13:30:14,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905454257] [2020-11-09 13:30:14,417 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 [2020-11-09 13:30:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:14,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:14,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:14,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392535930] [2020-11-09 13:30:14,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:14,593 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 13:30:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,222 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 13:30:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:15,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,224 INFO L225 Difference]: With dead ends: 81 [2020-11-09 13:30:15,224 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 13:30:15,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 13:30:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 13:30:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 13:30:15,230 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 13:30:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,230 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 13:30:15,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 13:30:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:15,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 13:30:15,443 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 13:30:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290746922] [2020-11-09 13:30:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290746922] [2020-11-09 13:30:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941012410] [2020-11-09 13:30:15,580 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 [2020-11-09 13:30:15,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557127790] [2020-11-09 13:30:15,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:15,747 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 13:30:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:16,453 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 13:30:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:16,454 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:16,455 INFO L225 Difference]: With dead ends: 82 [2020-11-09 13:30:16,455 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 13:30:16,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:30:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 13:30:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 13:30:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:16,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 13:30:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:16,459 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:16,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:16,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:16,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:30:16,670 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 13:30:16,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:16,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092857769] [2020-11-09 13:30:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092857769] [2020-11-09 13:30:16,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710708070] [2020-11-09 13:30:16,841 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 [2020-11-09 13:30:16,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 13:30:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:16,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:17,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:17,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261271148] [2020-11-09 13:30:17,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:17,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:17,037 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 13:30:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:17,606 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 13:30:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:17,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:17,612 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:17,612 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 13:30:17,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 13:30:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 13:30:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 13:30:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 13:30:17,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 13:30:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:17,617 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 13:30:17,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 13:30:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:17,617 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:17,617 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:30:17,828 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 13:30:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:17,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510079229] [2020-11-09 13:30:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510079229] [2020-11-09 13:30:18,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159821396] [2020-11-09 13:30:18,035 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 [2020-11-09 13:30:18,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:18,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:18,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 13:30:18,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812739068] [2020-11-09 13:30:18,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:18,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:18,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:18,190 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 13:30:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,533 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 13:30:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:18,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 13:30:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,535 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:18,535 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 13:30:18,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 13:30:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 13:30:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 13:30:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 13:30:18,540 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 13:30:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,540 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 13:30:18,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 13:30:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:18,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:18,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:30:18,754 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:18,755 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 13:30:18,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:18,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926694475] [2020-11-09 13:30:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926694475] [2020-11-09 13:30:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287686236] [2020-11-09 13:30:18,914 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 [2020-11-09 13:30:19,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 13:30:19,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:19,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:19,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:19,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:19,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:19,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243164037] [2020-11-09 13:30:19,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:19,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:19,094 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 13:30:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:19,826 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 13:30:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:19,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:19,828 INFO L225 Difference]: With dead ends: 83 [2020-11-09 13:30:19,828 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 13:30:19,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 13:30:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 13:30:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:19,832 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 13:30:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:19,832 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:19,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:19,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:19,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:20,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:20,042 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 13:30:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:20,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459211059] [2020-11-09 13:30:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459211059] [2020-11-09 13:30:20,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007523824] [2020-11-09 13:30:20,189 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 [2020-11-09 13:30:20,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 13:30:20,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:20,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:20,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280013770] [2020-11-09 13:30:20,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:20,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:20,359 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 13:30:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:21,152 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 13:30:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:21,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:21,154 INFO L225 Difference]: With dead ends: 91 [2020-11-09 13:30:21,154 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:21,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 13:30:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 13:30:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 13:30:21,158 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 13:30:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:21,158 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 13:30:21,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 13:30:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:21,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:21,159 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:21,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:21,360 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 13:30:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:21,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361469031] [2020-11-09 13:30:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361469031] [2020-11-09 13:30:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344881831] [2020-11-09 13:30:21,554 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 [2020-11-09 13:30:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:21,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:21,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753287775] [2020-11-09 13:30:21,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:21,748 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 13:30:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,671 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 13:30:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:22,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:22,674 INFO L225 Difference]: With dead ends: 92 [2020-11-09 13:30:22,674 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:22,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 13:30:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:22,677 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 13:30:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:22,678 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:22,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:22,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:22,678 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:22,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:22,889 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:22,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 13:30:22,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:22,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772957826] [2020-11-09 13:30:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772957826] [2020-11-09 13:30:23,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645922379] [2020-11-09 13:30:23,088 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 [2020-11-09 13:30:23,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:23,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:23,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:23,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986793373] [2020-11-09 13:30:23,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:23,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:23,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:23,262 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 13:30:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:24,068 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 13:30:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:24,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:24,071 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:24,071 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 13:30:24,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:30:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 13:30:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 13:30:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 13:30:24,075 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 13:30:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:24,075 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 13:30:24,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 13:30:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:24,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:24,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:24,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:30:24,287 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 13:30:24,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:24,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191325898] [2020-11-09 13:30:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191325898] [2020-11-09 13:30:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349378701] [2020-11-09 13:30:24,572 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 [2020-11-09 13:30:24,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:30:24,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:24,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:24,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 13:30:24,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018692929] [2020-11-09 13:30:24,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:24,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:24,718 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 13:30:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:25,160 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 13:30:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:25,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 13:30:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:25,162 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:25,162 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 13:30:25,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 13:30:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 13:30:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 13:30:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 13:30:25,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 13:30:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:25,167 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 13:30:25,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 13:30:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:25,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:25,168 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:25,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 13:30:25,379 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 13:30:25,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:25,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266871055] [2020-11-09 13:30:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:25,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266871055] [2020-11-09 13:30:25,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620527142] [2020-11-09 13:30:25,573 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:25,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:25,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:25,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:25,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:25,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634933924] [2020-11-09 13:30:25,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:25,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:25,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:25,762 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 13:30:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:26,707 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 13:30:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:26,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:26,709 INFO L225 Difference]: With dead ends: 93 [2020-11-09 13:30:26,709 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:30:26,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:30:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 13:30:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:26,713 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 13:30:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:26,713 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:26,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:26,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:26,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:26,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:30:26,924 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 13:30:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:26,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207999623] [2020-11-09 13:30:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207999623] [2020-11-09 13:30:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178804109] [2020-11-09 13:30:27,106 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 [2020-11-09 13:30:27,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:30:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:27,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:27,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:27,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131661345] [2020-11-09 13:30:27,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:27,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:27,292 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 13:30:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:28,340 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 13:30:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:28,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:28,343 INFO L225 Difference]: With dead ends: 101 [2020-11-09 13:30:28,343 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 13:30:28,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 13:30:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 13:30:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 13:30:28,347 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 13:30:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:28,348 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 13:30:28,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 13:30:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:28,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:28,348 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:28,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 13:30:28,554 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 13:30:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:28,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661496879] [2020-11-09 13:30:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661496879] [2020-11-09 13:30:28,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284605491] [2020-11-09 13:30:28,774 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 [2020-11-09 13:30:28,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 13:30:28,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:28,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:28,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:28,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601551732] [2020-11-09 13:30:28,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:28,969 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-09 13:30:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:30,108 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 13:30:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:30:30,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:30,110 INFO L225 Difference]: With dead ends: 102 [2020-11-09 13:30:30,110 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 13:30:30,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:30:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 13:30:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 13:30:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:30,114 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 13:30:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:30,114 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:30,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:30,115 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:30,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:30:30,324 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 13:30:30,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:30,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409790744] [2020-11-09 13:30:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409790744] [2020-11-09 13:30:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531611275] [2020-11-09 13:30:30,556 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 [2020-11-09 13:30:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:30,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:30,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:30,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361253685] [2020-11-09 13:30:30,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:30,743 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-11-09 13:30:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:31,835 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 13:30:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:31,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:31,836 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:31,836 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:31,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 13:30:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 13:30:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 13:30:31,840 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 13:30:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:31,840 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 13:30:31,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 13:30:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:31,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:31,841 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:32,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:32,042 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-11-09 13:30:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:32,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546096009] [2020-11-09 13:30:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:32,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546096009] [2020-11-09 13:30:32,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107252101] [2020-11-09 13:30:32,377 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 [2020-11-09 13:30:32,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:32,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:32,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:32,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:32,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 13:30:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946250025] [2020-11-09 13:30:32,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:32,525 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-09 13:30:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:33,100 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 13:30:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:33,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 13:30:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:33,102 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:33,102 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:33,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:30:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-09 13:30:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:30:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-09 13:30:33,106 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-09 13:30:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:33,107 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-09 13:30:33,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-09 13:30:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:33,107 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:33,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 13:30:33,320 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-11-09 13:30:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:33,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322911345] [2020-11-09 13:30:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322911345] [2020-11-09 13:30:33,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549820121] [2020-11-09 13:30:33,562 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 [2020-11-09 13:30:33,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 13:30:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:33,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:33,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:33,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777885014] [2020-11-09 13:30:33,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:33,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:33,744 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-09 13:30:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:34,944 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-09 13:30:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:34,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:34,947 INFO L225 Difference]: With dead ends: 103 [2020-11-09 13:30:34,947 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:34,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-11-09 13:30:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:34,951 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-11-09 13:30:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:34,951 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:34,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:34,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:34,952 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:35,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 13:30:35,162 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-11-09 13:30:35,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:35,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626295513] [2020-11-09 13:30:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626295513] [2020-11-09 13:30:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947455330] [2020-11-09 13:30:35,401 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 [2020-11-09 13:30:35,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:35,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:35,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:35,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:35,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683739542] [2020-11-09 13:30:35,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:35,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:35,589 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 13:30:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:36,887 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-11-09 13:30:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:30:36,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:36,890 INFO L225 Difference]: With dead ends: 111 [2020-11-09 13:30:36,890 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 13:30:36,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 13:30:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-11-09 13:30:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 13:30:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-09 13:30:36,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-09 13:30:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:36,895 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-09 13:30:36,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-09 13:30:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:36,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:36,896 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:37,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:37,108 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-11-09 13:30:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:37,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272145292] [2020-11-09 13:30:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272145292] [2020-11-09 13:30:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113957954] [2020-11-09 13:30:37,384 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 [2020-11-09 13:30:37,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 13:30:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:37,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:37,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:37,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:37,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:37,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086548990] [2020-11-09 13:30:37,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:37,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:37,581 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-09 13:30:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:38,974 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 13:30:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:30:38,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:38,976 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:38,976 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 13:30:38,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 13:30:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 13:30:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:38,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 13:30:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:38,981 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:38,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:38,981 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:38,982 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:39,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:39,192 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-11-09 13:30:39,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:39,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063004758] [2020-11-09 13:30:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:39,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063004758] [2020-11-09 13:30:39,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173557159] [2020-11-09 13:30:39,450 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 [2020-11-09 13:30:39,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:30:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:39,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:39,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795397979] [2020-11-09 13:30:39,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:39,635 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-11-09 13:30:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:40,931 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 13:30:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:40,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:40,933 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:40,933 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 13:30:40,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:30:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 13:30:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 13:30:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 13:30:40,938 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 13:30:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:40,938 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 13:30:40,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 13:30:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:40,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:40,939 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:41,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 13:30:41,150 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-11-09 13:30:41,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:41,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722964883] [2020-11-09 13:30:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722964883] [2020-11-09 13:30:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165136343] [2020-11-09 13:30:41,575 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 [2020-11-09 13:30:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:41,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:41,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 13:30:41,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419633924] [2020-11-09 13:30:41,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:41,720 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-09 13:30:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:42,386 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 13:30:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:42,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 13:30:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:42,388 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:42,388 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 13:30:42,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 13:30:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-09 13:30:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-09 13:30:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-09 13:30:42,392 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-09 13:30:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:42,393 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-09 13:30:42,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-09 13:30:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:42,393 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:42,393 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:42,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:42,599 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-11-09 13:30:42,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:42,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418702668] [2020-11-09 13:30:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418702668] [2020-11-09 13:30:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330534786] [2020-11-09 13:30:42,916 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 [2020-11-09 13:30:43,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:43,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:43,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:43,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:43,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511148761] [2020-11-09 13:30:43,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:43,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:43,124 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-09 13:30:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:44,614 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-09 13:30:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:44,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:44,616 INFO L225 Difference]: With dead ends: 113 [2020-11-09 13:30:44,616 INFO L226 Difference]: Without dead ends: 108 [2020-11-09 13:30:44,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-09 13:30:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-11-09 13:30:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:44,620 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-11-09 13:30:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:44,620 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:44,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:44,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:44,621 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:44,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 13:30:44,829 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-11-09 13:30:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:44,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804338025] [2020-11-09 13:30:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:45,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804338025] [2020-11-09 13:30:45,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561274246] [2020-11-09 13:30:45,122 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 [2020-11-09 13:30:45,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 13:30:45,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:45,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:45,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:45,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:45,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625322664] [2020-11-09 13:30:45,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:45,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:45,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:45,325 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 13:30:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:46,969 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-11-09 13:30:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 13:30:46,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:46,972 INFO L225 Difference]: With dead ends: 121 [2020-11-09 13:30:46,972 INFO L226 Difference]: Without dead ends: 112 [2020-11-09 13:30:46,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-09 13:30:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-11-09 13:30:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:30:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-09 13:30:46,976 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-09 13:30:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:46,977 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-09 13:30:46,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-09 13:30:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:46,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:46,978 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:47,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:47,188 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-11-09 13:30:47,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:47,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141627960] [2020-11-09 13:30:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141627960] [2020-11-09 13:30:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080887798] [2020-11-09 13:30:47,540 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 [2020-11-09 13:30:47,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:47,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:47,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:47,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254805940] [2020-11-09 13:30:47,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:47,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:47,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:47,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:47,742 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-09 13:30:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:49,456 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 13:30:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:49,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:49,459 INFO L225 Difference]: With dead ends: 122 [2020-11-09 13:30:49,459 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 13:30:49,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 13:30:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 13:30:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 13:30:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:49,464 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 13:30:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:49,464 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:49,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:49,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:49,465 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:49,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 13:30:49,676 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-11-09 13:30:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:49,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426830798] [2020-11-09 13:30:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426830798] [2020-11-09 13:30:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601782410] [2020-11-09 13:30:50,011 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 [2020-11-09 13:30:50,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 13:30:50,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:50,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:50,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:50,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:50,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:50,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885825500] [2020-11-09 13:30:50,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:50,221 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-11-09 13:30:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:51,834 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 13:30:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:51,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:51,836 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:51,836 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 13:30:51,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:30:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 13:30:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 13:30:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 13:30:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 13:30:51,841 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 13:30:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:51,841 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 13:30:51,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 13:30:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:51,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:51,842 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:52,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 13:30:52,053 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-11-09 13:30:52,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:52,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052768039] [2020-11-09 13:30:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052768039] [2020-11-09 13:30:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942976275] [2020-11-09 13:30:52,538 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 [2020-11-09 13:30:52,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 13:30:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:52,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:52,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:52,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 13:30:52,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712171759] [2020-11-09 13:30:52,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:52,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:52,697 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-09 13:30:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:53,454 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 13:30:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:53,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 13:30:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:53,456 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:53,456 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:53,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-09 13:30:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 13:30:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-09 13:30:53,461 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-09 13:30:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:53,461 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-09 13:30:53,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-09 13:30:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:53,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:53,462 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:53,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 13:30:53,673 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:53,674 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-11-09 13:30:53,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:53,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827961068] [2020-11-09 13:30:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827961068] [2020-11-09 13:30:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207329357] [2020-11-09 13:30:54,023 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 [2020-11-09 13:30:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:54,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:30:54,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:54,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:54,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365435090] [2020-11-09 13:30:54,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:54,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:54,252 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-09 13:30:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:56,025 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-09 13:30:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:56,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:56,027 INFO L225 Difference]: With dead ends: 123 [2020-11-09 13:30:56,027 INFO L226 Difference]: Without dead ends: 118 [2020-11-09 13:30:56,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 13:30:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-09 13:30:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-11-09 13:30:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:56,032 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-11-09 13:30:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:56,032 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:56,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:56,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:56,033 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:56,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 13:30:56,244 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-11-09 13:30:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:56,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536735967] [2020-11-09 13:30:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536735967] [2020-11-09 13:30:56,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464738205] [2020-11-09 13:30:56,590 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 [2020-11-09 13:30:56,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:56,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415691638] [2020-11-09 13:30:56,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:56,802 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 13:30:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:58,578 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-11-09 13:30:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:58,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:58,580 INFO L225 Difference]: With dead ends: 131 [2020-11-09 13:30:58,580 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:30:58,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 13:30:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:30:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-11-09 13:30:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 13:30:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-09 13:30:58,584 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-09 13:30:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:58,585 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-09 13:30:58,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-09 13:30:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:58,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:58,585 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:58,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 13:30:58,786 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-11-09 13:30:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:58,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356076183] [2020-11-09 13:30:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:59,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356076183] [2020-11-09 13:30:59,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302798521] [2020-11-09 13:30:59,157 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 [2020-11-09 13:30:59,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 13:30:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:59,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:59,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:59,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725313643] [2020-11-09 13:30:59,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:59,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:59,365 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-09 13:31:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:01,401 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 13:31:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 13:31:01,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:31:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:01,403 INFO L225 Difference]: With dead ends: 132 [2020-11-09 13:31:01,403 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:31:01,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:31:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:31:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 13:31:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:31:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:31:01,407 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 13:31:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:01,408 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:31:01,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:31:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:31:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:31:01,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:01,408 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:01,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 13:31:01,619 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-11-09 13:31:01,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:01,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256952183] [2020-11-09 13:31:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256952183] [2020-11-09 13:31:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154070712] [2020-11-09 13:31:02,003 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 [2020-11-09 13:31:02,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:31:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:02,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:02,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:02,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:31:02,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784699472] [2020-11-09 13:31:02,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:31:02,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:31:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:31:02,216 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-11-09 13:31:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:04,141 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 13:31:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:31:04,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:31:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:04,143 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:31:04,143 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 13:31:04,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 13:31:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 13:31:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 13:31:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:31:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 13:31:04,148 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 13:31:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:04,149 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 13:31:04,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:31:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 13:31:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:31:04,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:04,150 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:04,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 13:31:04,363 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-11-09 13:31:04,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:04,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916862643] [2020-11-09 13:31:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916862643] [2020-11-09 13:31:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094956572] [2020-11-09 13:31:04,954 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 [2020-11-09 13:31:05,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 13:31:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:31:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:05,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:05,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:05,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 13:31:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387663135] [2020-11-09 13:31:05,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:31:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:31:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:31:05,109 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-09 13:31:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:06,079 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 13:31:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:31:06,080 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 13:31:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:06,081 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:31:06,081 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 13:31:06,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:31:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 13:31:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-09 13:31:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 13:31:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-09 13:31:06,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-09 13:31:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:06,086 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-09 13:31:06,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:31:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-09 13:31:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:31:06,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:06,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:06,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:06,298 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:06,299 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-11-09 13:31:06,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:06,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722760676] [2020-11-09 13:31:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:06,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722760676] [2020-11-09 13:31:06,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120586564] [2020-11-09 13:31:06,749 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 [2020-11-09 13:31:06,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 13:31:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:31:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:06,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:06,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:06,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:31:06,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291477838] [2020-11-09 13:31:06,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:31:06,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:31:06,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:31:06,995 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-09 13:31:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:09,128 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-09 13:31:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:31:09,129 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:31:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:09,130 INFO L225 Difference]: With dead ends: 133 [2020-11-09 13:31:09,130 INFO L226 Difference]: Without dead ends: 128 [2020-11-09 13:31:09,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:31:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-09 13:31:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-11-09 13:31:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:31:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:31:09,137 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-11-09 13:31:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:09,137 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:31:09,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:31:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:31:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:31:09,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:09,138 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:09,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 13:31:09,350 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-11-09 13:31:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096563702] [2020-11-09 13:31:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:09,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096563702] [2020-11-09 13:31:09,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223223708] [2020-11-09 13:31:09,800 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 [2020-11-09 13:31:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:31:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:09,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:10,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:10,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:31:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026467848] [2020-11-09 13:31:10,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:31:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:31:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:31:10,003 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 13:31:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:12,233 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-11-09 13:31:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 13:31:12,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:31:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:12,236 INFO L225 Difference]: With dead ends: 141 [2020-11-09 13:31:12,236 INFO L226 Difference]: Without dead ends: 132 [2020-11-09 13:31:12,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:31:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-09 13:31:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-11-09 13:31:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:31:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-09 13:31:12,241 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-09 13:31:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:12,241 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-09 13:31:12,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:31:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-09 13:31:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:31:12,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:12,242 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:12,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:12,446 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-11-09 13:31:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:12,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517271693] [2020-11-09 13:31:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517271693] [2020-11-09 13:31:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128065543] [2020-11-09 13:31:12,900 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 [2020-11-09 13:31:13,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:13,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:31:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:31:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452305817] [2020-11-09 13:31:13,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:31:13,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:13,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:31:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:31:13,123 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-09 13:31:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:15,397 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 13:31:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:31:15,398 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:31:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:15,399 INFO L225 Difference]: With dead ends: 142 [2020-11-09 13:31:15,399 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 13:31:15,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:31:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 13:31:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 13:31:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:31:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:31:15,403 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 13:31:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:15,403 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:31:15,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:31:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:31:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:31:15,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:15,404 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:15,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 13:31:15,605 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-11-09 13:31:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:15,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688118587] [2020-11-09 13:31:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:16,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688118587] [2020-11-09 13:31:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513830462] [2020-11-09 13:31:16,058 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 [2020-11-09 13:31:16,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 13:31:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:31:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:16,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:16,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:16,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:31:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183147003] [2020-11-09 13:31:16,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:31:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:31:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:31:16,288 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-11-09 13:31:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:18,582 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 13:31:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:31:18,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:31:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:18,585 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:31:18,585 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 13:31:18,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:31:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 13:31:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 13:31:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 13:31:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 13:31:18,589 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 13:31:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:18,590 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 13:31:18,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:31:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 13:31:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:31:18,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:18,590 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:18,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:18,801 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-11-09 13:31:18,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:18,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694425316] [2020-11-09 13:31:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:19,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694425316] [2020-11-09 13:31:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231917608] [2020-11-09 13:31:19,494 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 [2020-11-09 13:31:19,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:19,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:31:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:19,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:19,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:19,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 13:31:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050874172] [2020-11-09 13:31:19,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:31:19,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:31:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:31:19,648 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-11-09 13:31:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:20,678 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 13:31:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:31:20,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 13:31:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:20,680 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:31:20,680 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 13:31:20,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:31:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 13:31:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-11-09 13:31:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 13:31:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-09 13:31:20,685 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-09 13:31:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:20,685 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-09 13:31:20,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:31:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-09 13:31:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:31:20,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:20,686 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:20,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 13:31:20,898 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-11-09 13:31:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:20,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644067987] [2020-11-09 13:31:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:21,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644067987] [2020-11-09 13:31:21,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334250182] [2020-11-09 13:31:21,407 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 [2020-11-09 13:31:21,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 13:31:21,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:21,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:31:21,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:21,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:21,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:21,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:31:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532803141] [2020-11-09 13:31:21,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:31:21,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:31:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:31:21,648 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-11-09 13:31:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:24,029 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-09 13:31:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 13:31:24,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:31:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:24,032 INFO L225 Difference]: With dead ends: 143 [2020-11-09 13:31:24,032 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 13:31:24,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:31:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 13:31:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-11-09 13:31:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:31:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 13:31:24,035 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-11-09 13:31:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:24,036 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 13:31:24,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:31:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 13:31:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:31:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:24,037 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:24,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 13:31:24,246 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-11-09 13:31:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:24,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379684787] [2020-11-09 13:31:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:24,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379684787] [2020-11-09 13:31:24,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763271387] [2020-11-09 13:31:24,777 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 [2020-11-09 13:31:24,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-09 13:31:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:24,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:31:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:25,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:25,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:31:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108901212] [2020-11-09 13:31:25,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:31:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:31:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:31:25,014 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 13:31:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:27,410 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-11-09 13:31:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:31:27,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:31:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:27,413 INFO L225 Difference]: With dead ends: 151 [2020-11-09 13:31:27,413 INFO L226 Difference]: Without dead ends: 142 [2020-11-09 13:31:27,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-11-09 13:31:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-09 13:31:27,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-11-09 13:31:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 13:31:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-11-09 13:31:27,417 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-11-09 13:31:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:27,417 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-11-09 13:31:27,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:31:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-11-09 13:31:27,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:31:27,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:27,418 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:27,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 13:31:27,619 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-11-09 13:31:27,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:27,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803094414] [2020-11-09 13:31:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:28,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803094414] [2020-11-09 13:31:28,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882280573] [2020-11-09 13:31:28,184 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 [2020-11-09 13:31:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:31:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:28,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:28,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:28,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 13:31:28,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849348870] [2020-11-09 13:31:28,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:31:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:31:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:31:28,411 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-11-09 13:31:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:31,106 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 13:31:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 13:31:31,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 13:31:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:31,109 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:31:31,109 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 13:31:31,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-11-09 13:31:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 13:31:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 13:31:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:31:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 13:31:31,111 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 13:31:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:31,112 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 13:31:31,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:31:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 13:31:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:31:31,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:31,112 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:31,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-09 13:31:31,313 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-11-09 13:31:31,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:31,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905776975] [2020-11-09 13:31:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:31,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905776975] [2020-11-09 13:31:31,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756908869] [2020-11-09 13:31:31,843 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 [2020-11-09 13:31:31,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:31,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:31:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:32,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:32,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:32,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 13:31:32,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28832075] [2020-11-09 13:31:32,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:31:32,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:32,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:31:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:31:32,076 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 26 states. [2020-11-09 13:31:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:34,773 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 13:31:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 13:31:34,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 13:31:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:34,775 INFO L225 Difference]: With dead ends: 128 [2020-11-09 13:31:34,775 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:31:34,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 13:31:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:31:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 13:31:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:31:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 13:31:34,779 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 13:31:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:34,779 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 13:31:34,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:31:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 13:31:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:34,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:34,780 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:34,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:34,989 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 51 times [2020-11-09 13:31:34,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:34,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957388439] [2020-11-09 13:31:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957388439] [2020-11-09 13:31:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011044574] [2020-11-09 13:31:35,777 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 [2020-11-09 13:31:35,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 13:31:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 13:31:35,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:35,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:35,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:35,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 13:31:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107397050] [2020-11-09 13:31:35,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:31:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:31:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:31:35,943 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-11-09 13:31:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:37,203 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 13:31:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:31:37,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 13:31:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:37,205 INFO L225 Difference]: With dead ends: 128 [2020-11-09 13:31:37,205 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:31:37,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:31:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:31:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-11-09 13:31:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-09 13:31:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-11-09 13:31:37,209 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-11-09 13:31:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:37,209 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-11-09 13:31:37,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:31:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-11-09 13:31:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:37,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:37,210 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:37,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:37,411 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 52 times [2020-11-09 13:31:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:37,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320502594] [2020-11-09 13:31:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320502594] [2020-11-09 13:31:38,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580397277] [2020-11-09 13:31:38,021 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 [2020-11-09 13:31:38,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:38,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 13:31:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:38,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:38,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:38,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 13:31:38,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230935296] [2020-11-09 13:31:38,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 13:31:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 13:31:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:31:38,255 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 27 states. [2020-11-09 13:31:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:41,123 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-11-09 13:31:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 13:31:41,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 13:31:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:41,125 INFO L225 Difference]: With dead ends: 153 [2020-11-09 13:31:41,126 INFO L226 Difference]: Without dead ends: 148 [2020-11-09 13:31:41,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 13:31:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-09 13:31:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2020-11-09 13:31:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:31:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 13:31:41,129 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 30 [2020-11-09 13:31:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:41,130 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 13:31:41,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 13:31:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 13:31:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:41,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:41,130 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-09 13:31:41,342 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 53 times [2020-11-09 13:31:41,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:41,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395154798] [2020-11-09 13:31:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395154798] [2020-11-09 13:31:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200022695] [2020-11-09 13:31:41,962 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:42,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-09 13:31:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 13:31:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:42,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:42,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:42,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 13:31:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837888626] [2020-11-09 13:31:42,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 13:31:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 13:31:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:31:42,206 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 13:31:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:45,195 INFO L93 Difference]: Finished difference Result 161 states and 383 transitions. [2020-11-09 13:31:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-09 13:31:45,196 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 13:31:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:45,198 INFO L225 Difference]: With dead ends: 161 [2020-11-09 13:31:45,198 INFO L226 Difference]: Without dead ends: 152 [2020-11-09 13:31:45,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 13:31:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-09 13:31:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2020-11-09 13:31:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 13:31:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-11-09 13:31:45,202 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 30 [2020-11-09 13:31:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:45,202 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-11-09 13:31:45,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 13:31:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-11-09 13:31:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 13:31:45,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:45,203 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:45,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:45,404 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 54 times [2020-11-09 13:31:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:45,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466292873] [2020-11-09 13:31:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466292873] [2020-11-09 13:31:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257395901] [2020-11-09 13:31:46,056 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:46,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 13:31:46,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:31:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:46,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:46,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 13:31:46,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99661822] [2020-11-09 13:31:46,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:46,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:46,306 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-11-09 13:31:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:49,307 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 13:31:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 13:31:49,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 13:31:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:49,309 INFO L225 Difference]: With dead ends: 162 [2020-11-09 13:31:49,310 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 13:31:49,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 13:31:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 13:31:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 13:31:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:31:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 13:31:49,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 13:31:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:49,318 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 13:31:49,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 13:31:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 13:31:49,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:49,319 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:49,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 13:31:49,520 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 55 times [2020-11-09 13:31:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:49,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102718826] [2020-11-09 13:31:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:50,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102718826] [2020-11-09 13:31:50,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630218210] [2020-11-09 13:31:50,208 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 [2020-11-09 13:31:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 13:31:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:50,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:50,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:50,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 13:31:50,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822727314] [2020-11-09 13:31:50,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:50,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:50,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:50,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:50,447 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 28 states. [2020-11-09 13:31:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:53,470 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 13:31:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 13:31:53,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 13:31:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:53,473 INFO L225 Difference]: With dead ends: 136 [2020-11-09 13:31:53,473 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 13:31:53,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 13:31:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 13:31:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 13:31:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 13:31:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 13:31:53,477 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 13:31:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:53,478 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 13:31:53,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 13:31:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:31:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:53,479 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:53,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 13:31:53,689 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 56 times [2020-11-09 13:31:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:53,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169588145] [2020-11-09 13:31:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:54,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169588145] [2020-11-09 13:31:54,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092853357] [2020-11-09 13:31:54,621 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 [2020-11-09 13:31:54,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:54,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 13:31:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:54,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:54,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:54,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 13:31:54,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277593890] [2020-11-09 13:31:54,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:54,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:54,765 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-11-09 13:31:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:56,249 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 13:31:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:31:56,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 13:31:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:56,251 INFO L225 Difference]: With dead ends: 136 [2020-11-09 13:31:56,251 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 13:31:56,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=897, Invalid=1859, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 13:31:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 13:31:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-11-09 13:31:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 13:31:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-11-09 13:31:56,255 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-11-09 13:31:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:56,255 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-11-09 13:31:56,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-11-09 13:31:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:31:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:56,256 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:56,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 13:31:56,467 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 57 times [2020-11-09 13:31:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:56,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151996832] [2020-11-09 13:31:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151996832] [2020-11-09 13:31:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784335448] [2020-11-09 13:31:57,176 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 [2020-11-09 13:31:57,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 13:31:57,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:31:57,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:57,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:57,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 13:31:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140937399] [2020-11-09 13:31:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 13:31:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 13:31:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:31:57,436 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 29 states. [2020-11-09 13:32:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:00,671 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-11-09 13:32:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 13:32:00,672 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 13:32:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:00,674 INFO L225 Difference]: With dead ends: 163 [2020-11-09 13:32:00,674 INFO L226 Difference]: Without dead ends: 158 [2020-11-09 13:32:00,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 13:32:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-09 13:32:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 81. [2020-11-09 13:32:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 13:32:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 13:32:00,678 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 32 [2020-11-09 13:32:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:00,678 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 13:32:00,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 13:32:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 13:32:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:32:00,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:00,679 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:00,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-09 13:32:00,889 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 58 times [2020-11-09 13:32:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:00,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766731155] [2020-11-09 13:32:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:01,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766731155] [2020-11-09 13:32:01,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389395522] [2020-11-09 13:32:01,607 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 [2020-11-09 13:32:01,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:32:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:32:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:01,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:01,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:01,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 13:32:01,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340874929] [2020-11-09 13:32:01,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 13:32:01,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 13:32:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:32:01,837 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 13:32:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:05,288 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-11-09 13:32:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-09 13:32:05,289 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 13:32:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:05,290 INFO L225 Difference]: With dead ends: 171 [2020-11-09 13:32:05,290 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 13:32:05,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 13:32:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 13:32:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2020-11-09 13:32:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 13:32:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-11-09 13:32:05,294 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 32 [2020-11-09 13:32:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:05,294 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-11-09 13:32:05,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 13:32:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-11-09 13:32:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 13:32:05,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:05,295 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:05,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 13:32:05,496 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 59 times [2020-11-09 13:32:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:05,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373686430] [2020-11-09 13:32:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:06,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373686430] [2020-11-09 13:32:06,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524876966] [2020-11-09 13:32:06,328 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 [2020-11-09 13:32:06,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 13:32:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 13:32:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:06,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:06,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:06,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 13:32:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813218143] [2020-11-09 13:32:06,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:32:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:32:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:32:06,558 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-11-09 13:32:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:10,120 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 13:32:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 13:32:10,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 13:32:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:10,123 INFO L225 Difference]: With dead ends: 172 [2020-11-09 13:32:10,123 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 13:32:10,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-11-09 13:32:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 13:32:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 13:32:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 13:32:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 13:32:10,126 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 13:32:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:10,126 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 13:32:10,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:32:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 13:32:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 13:32:10,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:10,127 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:10,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:10,328 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 60 times [2020-11-09 13:32:10,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:10,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582922229] [2020-11-09 13:32:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582922229] [2020-11-09 13:32:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140491761] [2020-11-09 13:32:11,054 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 [2020-11-09 13:32:11,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 13:32:11,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 13:32:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:11,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:11,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:11,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 13:32:11,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767960944] [2020-11-09 13:32:11,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:32:11,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:11,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:32:11,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:32:11,311 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 30 states. [2020-11-09 13:32:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:14,804 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 13:32:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 13:32:14,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 13:32:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:14,807 INFO L225 Difference]: With dead ends: 144 [2020-11-09 13:32:14,807 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 13:32:14,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 13:32:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 13:32:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 13:32:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 13:32:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 13:32:14,811 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 13:32:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:14,811 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 13:32:14,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:32:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 13:32:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:32:14,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:14,812 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:15,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:15,017 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 61 times [2020-11-09 13:32:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:15,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845878770] [2020-11-09 13:32:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:16,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845878770] [2020-11-09 13:32:16,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080296033] [2020-11-09 13:32:16,085 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 [2020-11-09 13:32:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:32:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:16,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:16,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 13:32:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035135474] [2020-11-09 13:32:16,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:32:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:32:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:32:16,250 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-11-09 13:32:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:17,928 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 13:32:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:32:17,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 13:32:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:17,930 INFO L225 Difference]: With dead ends: 144 [2020-11-09 13:32:17,930 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 13:32:17,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:32:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 13:32:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-11-09 13:32:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-09 13:32:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-11-09 13:32:17,932 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-11-09 13:32:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:17,933 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-11-09 13:32:17,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:32:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-11-09 13:32:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:32:17,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:17,933 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:18,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-09 13:32:18,135 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 62 times [2020-11-09 13:32:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:18,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19037424] [2020-11-09 13:32:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:18,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19037424] [2020-11-09 13:32:18,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804031014] [2020-11-09 13:32:18,920 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 [2020-11-09 13:32:19,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:32:19,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 13:32:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:19,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:19,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:19,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 13:32:19,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300271268] [2020-11-09 13:32:19,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 13:32:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 13:32:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:32:19,175 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 31 states. [2020-11-09 13:32:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:22,889 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-11-09 13:32:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 13:32:22,891 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 13:32:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:22,892 INFO L225 Difference]: With dead ends: 173 [2020-11-09 13:32:22,892 INFO L226 Difference]: Without dead ends: 168 [2020-11-09 13:32:22,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 13:32:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-09 13:32:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 85. [2020-11-09 13:32:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:32:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 13:32:22,896 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 34 [2020-11-09 13:32:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:22,896 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 13:32:22,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 13:32:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 13:32:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:32:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:22,897 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:23,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:23,108 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 63 times [2020-11-09 13:32:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:23,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372729088] [2020-11-09 13:32:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372729088] [2020-11-09 13:32:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571022931] [2020-11-09 13:32:23,930 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 [2020-11-09 13:32:24,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-09 13:32:24,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:24,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:32:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:24,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:24,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 13:32:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507534648] [2020-11-09 13:32:24,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 13:32:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:24,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 13:32:24,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:32:24,198 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 13:32:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:27,766 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-11-09 13:32:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 13:32:27,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 13:32:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:27,769 INFO L225 Difference]: With dead ends: 181 [2020-11-09 13:32:27,769 INFO L226 Difference]: Without dead ends: 172 [2020-11-09 13:32:27,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1826, Invalid=4816, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 13:32:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-09 13:32:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2020-11-09 13:32:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 13:32:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-11-09 13:32:27,773 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 34 [2020-11-09 13:32:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:27,773 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-11-09 13:32:27,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 13:32:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-11-09 13:32:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 13:32:27,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:27,774 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:27,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-09 13:32:27,986 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 64 times [2020-11-09 13:32:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:27,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655442897] [2020-11-09 13:32:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655442897] [2020-11-09 13:32:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806677568] [2020-11-09 13:32:28,849 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 [2020-11-09 13:32:28,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:32:28,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:32:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:29,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:29,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:29,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 13:32:29,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655946295] [2020-11-09 13:32:29,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:32:29,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:32:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:32:29,105 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-11-09 13:32:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:33,143 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 13:32:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 13:32:33,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 13:32:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:33,145 INFO L225 Difference]: With dead ends: 182 [2020-11-09 13:32:33,145 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 13:32:33,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2317, Invalid=5165, Unknown=0, NotChecked=0, Total=7482 [2020-11-09 13:32:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 13:32:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 13:32:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:32:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 13:32:33,149 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 13:32:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:33,149 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 13:32:33,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:32:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 13:32:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 13:32:33,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:33,150 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:33,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:33,350 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 65 times [2020-11-09 13:32:33,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:33,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24301039] [2020-11-09 13:32:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24301039] [2020-11-09 13:32:34,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326946669] [2020-11-09 13:32:34,221 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 [2020-11-09 13:32:34,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 13:32:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:34,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:32:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:34,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:34,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:34,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 13:32:34,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2312157] [2020-11-09 13:32:34,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:32:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:32:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:32:34,496 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 32 states. [2020-11-09 13:32:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:38,452 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 13:32:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 13:32:38,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 13:32:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:38,455 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:32:38,455 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 13:32:38,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 13:32:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 13:32:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 13:32:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 13:32:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 13:32:38,458 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 13:32:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:38,458 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 13:32:38,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:32:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 13:32:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:32:38,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:38,459 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:38,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-09 13:32:38,668 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 66 times [2020-11-09 13:32:38,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:38,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224023518] [2020-11-09 13:32:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:39,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224023518] [2020-11-09 13:32:39,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496807429] [2020-11-09 13:32:39,851 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 [2020-11-09 13:32:40,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 13:32:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 13:32:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:40,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:40,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:40,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 13:32:40,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062669151] [2020-11-09 13:32:40,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:32:40,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:32:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:32:40,034 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-11-09 13:32:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:41,861 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 13:32:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 13:32:41,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 13:32:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:41,864 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:32:41,864 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 13:32:41,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:32:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 13:32:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2020-11-09 13:32:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-09 13:32:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-11-09 13:32:41,867 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-11-09 13:32:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:41,867 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-11-09 13:32:41,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:32:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-11-09 13:32:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:32:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:41,868 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:42,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:42,069 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:42,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:42,070 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 67 times [2020-11-09 13:32:42,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:42,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525657320] [2020-11-09 13:32:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525657320] [2020-11-09 13:32:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089569324] [2020-11-09 13:32:43,015 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 [2020-11-09 13:32:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:43,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 13:32:43,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:43,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:43,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:43,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 13:32:43,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464638700] [2020-11-09 13:32:43,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 13:32:43,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 13:32:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:32:43,275 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 33 states. [2020-11-09 13:32:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:47,455 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-09 13:32:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 13:32:47,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 13:32:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:47,458 INFO L225 Difference]: With dead ends: 183 [2020-11-09 13:32:47,458 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 13:32:47,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 13:32:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 13:32:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2020-11-09 13:32:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:32:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 13:32:47,461 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 36 [2020-11-09 13:32:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:47,461 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 13:32:47,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 13:32:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 13:32:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:32:47,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:47,462 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:47,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 13:32:47,663 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:47,664 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 68 times [2020-11-09 13:32:47,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:47,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098522463] [2020-11-09 13:32:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:48,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098522463] [2020-11-09 13:32:48,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593246545] [2020-11-09 13:32:48,585 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 [2020-11-09 13:32:48,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:32:48,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 13:32:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:48,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:48,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:48,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 13:32:48,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684823735] [2020-11-09 13:32:48,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 13:32:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 13:32:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:32:48,844 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 13:32:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:53,253 INFO L93 Difference]: Finished difference Result 191 states and 455 transitions. [2020-11-09 13:32:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-09 13:32:53,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 13:32:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:53,256 INFO L225 Difference]: With dead ends: 191 [2020-11-09 13:32:53,256 INFO L226 Difference]: Without dead ends: 182 [2020-11-09 13:32:53,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2481, Invalid=5529, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 13:32:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-11-09 13:32:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2020-11-09 13:32:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 13:32:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 307 transitions. [2020-11-09 13:32:53,259 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 307 transitions. Word has length 36 [2020-11-09 13:32:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:53,259 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 307 transitions. [2020-11-09 13:32:53,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 13:32:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 307 transitions. [2020-11-09 13:32:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 13:32:53,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:53,260 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:53,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 13:32:53,461 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 69 times [2020-11-09 13:32:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:53,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442135668] [2020-11-09 13:32:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442135668] [2020-11-09 13:32:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412180834] [2020-11-09 13:32:54,457 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 [2020-11-09 13:32:54,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 13:32:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:32:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:54,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:54,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 13:32:54,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378252768] [2020-11-09 13:32:54,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:32:54,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:32:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:32:54,739 INFO L87 Difference]: Start difference. First operand 119 states and 307 transitions. Second operand 34 states. [2020-11-09 13:32:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:59,068 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 13:32:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 13:32:59,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 13:32:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:59,071 INFO L225 Difference]: With dead ends: 192 [2020-11-09 13:32:59,071 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 13:32:59,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2371, Invalid=6185, Unknown=0, NotChecked=0, Total=8556 [2020-11-09 13:32:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 13:32:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 13:32:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:32:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 13:32:59,075 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 13:32:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:59,075 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 13:32:59,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:32:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 13:32:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 13:32:59,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:59,076 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:59,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:59,284 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 70 times [2020-11-09 13:32:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:59,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008304015] [2020-11-09 13:32:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008304015] [2020-11-09 13:33:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229625161] [2020-11-09 13:33:00,294 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 [2020-11-09 13:33:00,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:33:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 13:33:00,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:00,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:00,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:00,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 13:33:00,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142301353] [2020-11-09 13:33:00,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:33:00,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:00,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:33:00,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:33:00,566 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 34 states. [2020-11-09 13:33:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:05,050 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 13:33:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 13:33:05,051 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 13:33:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:05,052 INFO L225 Difference]: With dead ends: 160 [2020-11-09 13:33:05,053 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 13:33:05,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 13:33:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 13:33:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 13:33:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 13:33:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 13:33:05,057 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 13:33:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:05,057 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 13:33:05,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:33:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 13:33:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:33:05,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:05,058 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:05,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:05,268 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:05,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 71 times [2020-11-09 13:33:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:05,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619322952] [2020-11-09 13:33:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619322952] [2020-11-09 13:33:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241190251] [2020-11-09 13:33:06,618 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 [2020-11-09 13:33:06,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 13:33:06,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:06,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:33:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:06,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:06,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:06,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 13:33:06,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106171256] [2020-11-09 13:33:06,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:33:06,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:33:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:33:06,804 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 34 states. [2020-11-09 13:33:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:08,950 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 13:33:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:33:08,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 13:33:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:08,952 INFO L225 Difference]: With dead ends: 160 [2020-11-09 13:33:08,952 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 13:33:08,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1344, Invalid=2816, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 13:33:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 13:33:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-09 13:33:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-09 13:33:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-11-09 13:33:08,956 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-11-09 13:33:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:08,956 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-11-09 13:33:08,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:33:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-11-09 13:33:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:33:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:08,957 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:09,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:09,159 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 72 times [2020-11-09 13:33:09,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:09,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410672732] [2020-11-09 13:33:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:10,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410672732] [2020-11-09 13:33:10,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794653075] [2020-11-09 13:33:10,238 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 [2020-11-09 13:33:10,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 13:33:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:33:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:10,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:10,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:10,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 13:33:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689938284] [2020-11-09 13:33:10,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 13:33:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 13:33:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 13:33:10,538 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 35 states. [2020-11-09 13:33:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:15,433 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-11-09 13:33:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 13:33:15,435 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 13:33:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:15,436 INFO L225 Difference]: With dead ends: 193 [2020-11-09 13:33:15,436 INFO L226 Difference]: Without dead ends: 188 [2020-11-09 13:33:15,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2905, Invalid=6215, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 13:33:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-09 13:33:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 93. [2020-11-09 13:33:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 13:33:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 13:33:15,441 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 38 [2020-11-09 13:33:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:15,441 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 13:33:15,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 13:33:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 13:33:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:33:15,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:15,442 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:15,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:15,654 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:15,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 73 times [2020-11-09 13:33:15,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:15,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865713526] [2020-11-09 13:33:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:16,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865713526] [2020-11-09 13:33:16,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851870381] [2020-11-09 13:33:16,739 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 [2020-11-09 13:33:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:33:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:16,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:17,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:17,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 13:33:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366793144] [2020-11-09 13:33:17,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 13:33:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 13:33:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 13:33:17,008 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 13:33:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:21,929 INFO L93 Difference]: Finished difference Result 201 states and 479 transitions. [2020-11-09 13:33:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-09 13:33:21,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 13:33:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:21,933 INFO L225 Difference]: With dead ends: 201 [2020-11-09 13:33:21,934 INFO L226 Difference]: Without dead ends: 192 [2020-11-09 13:33:21,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2822, Invalid=6298, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 13:33:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-09 13:33:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2020-11-09 13:33:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 13:33:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 323 transitions. [2020-11-09 13:33:21,938 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 323 transitions. Word has length 38 [2020-11-09 13:33:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:21,938 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 323 transitions. [2020-11-09 13:33:21,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 13:33:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 323 transitions. [2020-11-09 13:33:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 13:33:21,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:21,939 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:22,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-09 13:33:22,152 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 74 times [2020-11-09 13:33:22,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:22,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831228241] [2020-11-09 13:33:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831228241] [2020-11-09 13:33:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384912279] [2020-11-09 13:33:23,458 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 [2020-11-09 13:33:23,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:33:23,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:23,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:33:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:23,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:23,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 13:33:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401792832] [2020-11-09 13:33:23,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:33:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:33:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:33:23,734 INFO L87 Difference]: Start difference. First operand 125 states and 323 transitions. Second operand 36 states. [2020-11-09 13:33:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:28,782 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 13:33:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 13:33:28,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 13:33:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:28,784 INFO L225 Difference]: With dead ends: 202 [2020-11-09 13:33:28,785 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 13:33:28,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2999, Invalid=6703, Unknown=0, NotChecked=0, Total=9702 [2020-11-09 13:33:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 13:33:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 13:33:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 13:33:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 13:33:28,788 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 13:33:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:28,789 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 13:33:28,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:33:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 13:33:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 13:33:28,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:28,789 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:28,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:29,000 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 75 times [2020-11-09 13:33:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771721377] [2020-11-09 13:33:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:30,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771721377] [2020-11-09 13:33:30,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723161485] [2020-11-09 13:33:30,162 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 [2020-11-09 13:33:30,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 13:33:30,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:33:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:30,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:30,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:30,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 13:33:30,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923443777] [2020-11-09 13:33:30,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:33:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:33:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:33:30,454 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 36 states. [2020-11-09 13:33:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:35,514 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 13:33:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 13:33:35,515 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 13:33:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:35,516 INFO L225 Difference]: With dead ends: 168 [2020-11-09 13:33:35,517 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 13:33:35,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 13:33:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 13:33:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 13:33:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 13:33:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 13:33:35,520 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 13:33:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:35,520 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 13:33:35,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:33:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 13:33:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:33:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:35,521 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:35,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-09 13:33:35,723 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:35,724 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 76 times [2020-11-09 13:33:35,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:35,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898974935] [2020-11-09 13:33:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898974935] [2020-11-09 13:33:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427308609] [2020-11-09 13:33:37,260 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 [2020-11-09 13:33:37,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:33:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:33:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:37,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:37,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:37,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 13:33:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456503581] [2020-11-09 13:33:37,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:33:37,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:33:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:33:37,439 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 36 states. [2020-11-09 13:33:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:39,890 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 13:33:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 13:33:39,892 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 13:33:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:39,893 INFO L225 Difference]: With dead ends: 168 [2020-11-09 13:33:39,893 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 13:33:39,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2020-11-09 13:33:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 13:33:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-11-09 13:33:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-09 13:33:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-11-09 13:33:39,896 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-11-09 13:33:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:39,896 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-11-09 13:33:39,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:33:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-11-09 13:33:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:33:39,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:39,897 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:40,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:40,099 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 77 times [2020-11-09 13:33:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:40,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487754791] [2020-11-09 13:33:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:41,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487754791] [2020-11-09 13:33:41,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920379978] [2020-11-09 13:33:41,307 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 [2020-11-09 13:33:41,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 13:33:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 13:33:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:41,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:41,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:41,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 13:33:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833974113] [2020-11-09 13:33:41,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 13:33:41,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 13:33:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:33:41,600 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 37 states. [2020-11-09 13:33:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:46,886 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-09 13:33:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 13:33:46,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 13:33:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:46,889 INFO L225 Difference]: With dead ends: 203 [2020-11-09 13:33:46,889 INFO L226 Difference]: Without dead ends: 198 [2020-11-09 13:33:46,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3274, Invalid=7028, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 13:33:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-09 13:33:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 97. [2020-11-09 13:33:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:33:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 13:33:46,892 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 40 [2020-11-09 13:33:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:46,893 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 13:33:46,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 13:33:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 13:33:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:33:46,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:46,893 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:47,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-09 13:33:47,103 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 78 times [2020-11-09 13:33:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:47,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799709034] [2020-11-09 13:33:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:48,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799709034] [2020-11-09 13:33:48,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944720071] [2020-11-09 13:33:48,352 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 [2020-11-09 13:33:48,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-11-09 13:33:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:33:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:48,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:48,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 13:33:48,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246338877] [2020-11-09 13:33:48,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 13:33:48,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:48,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 13:33:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:33:48,673 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 13:33:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:53,727 INFO L93 Difference]: Finished difference Result 211 states and 503 transitions. [2020-11-09 13:33:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 13:33:53,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 13:33:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:53,730 INFO L225 Difference]: With dead ends: 211 [2020-11-09 13:33:53,731 INFO L226 Difference]: Without dead ends: 202 [2020-11-09 13:33:53,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2702, Invalid=7198, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 13:33:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-09 13:33:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-11-09 13:33:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 13:33:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 339 transitions. [2020-11-09 13:33:53,734 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 339 transitions. Word has length 40 [2020-11-09 13:33:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:53,734 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 339 transitions. [2020-11-09 13:33:53,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 13:33:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 339 transitions. [2020-11-09 13:33:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 13:33:53,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:53,735 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:53,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:53,936 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 79 times [2020-11-09 13:33:53,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:53,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833976845] [2020-11-09 13:33:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:55,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833976845] [2020-11-09 13:33:55,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491224502] [2020-11-09 13:33:55,235 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 [2020-11-09 13:33:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:33:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:55,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:55,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:55,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 13:33:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567711858] [2020-11-09 13:33:55,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:33:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:33:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:33:55,514 INFO L87 Difference]: Start difference. First operand 131 states and 339 transitions. Second operand 38 states. [2020-11-09 13:34:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:34:01,183 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 13:34:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 13:34:01,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 13:34:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:34:01,186 INFO L225 Difference]: With dead ends: 212 [2020-11-09 13:34:01,186 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 13:34:01,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3373, Invalid=7547, Unknown=0, NotChecked=0, Total=10920 [2020-11-09 13:34:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 13:34:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 13:34:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:34:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 13:34:01,189 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 13:34:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:34:01,190 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 13:34:01,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 13:34:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 13:34:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 13:34:01,190 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:34:01,190 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:34:01,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:34:01,393 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:34:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:34:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 80 times [2020-11-09 13:34:01,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:34:01,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454442214] [2020-11-09 13:34:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:34:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:34:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:34:02,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454442214] [2020-11-09 13:34:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149820467] [2020-11-09 13:34:02,710 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 [2020-11-09 13:34:02,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:34:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:34:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:34:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:34:02,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:34:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:34:03,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:34:03,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 13:34:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444074930] [2020-11-09 13:34:03,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:34:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:34:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:34:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:34:03,002 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 38 states. [2020-11-09 13:34:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:34:08,737 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 13:34:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 13:34:08,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 13:34:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:34:08,740 INFO L225 Difference]: With dead ends: 176 [2020-11-09 13:34:08,740 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 13:34:08,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3299, Invalid=7207, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 13:34:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 13:34:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 13:34:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 13:34:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 13:34:08,744 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 13:34:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:34:08,745 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 13:34:08,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 13:34:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 13:34:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 13:34:08,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:34:08,745 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:34:08,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:34:08,955 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:34:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:34:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 81 times [2020-11-09 13:34:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:34:08,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422341375] [2020-11-09 13:34:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:34:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:34:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:34:10,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422341375] [2020-11-09 13:34:10,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066896292] [2020-11-09 13:34:10,701 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 [2020-11-09 13:34:10,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 13:34:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:34:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 13:34:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:34:10,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:34:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:34:10,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:34:10,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 13:34:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387892164] [2020-11-09 13:34:10,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:34:10,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:34:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:34:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:34:10,909 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 38 states. Received shutdown request... [2020-11-09 13:34:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:34:12,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:34:12,081 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 13:34:12,085 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 13:34:12,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:34:12 BasicIcfg [2020-11-09 13:34:12,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:34:12,086 INFO L168 Benchmark]: Toolchain (without parser) took 254733.87 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 109.1 MB in the beginning and 108.8 MB in the end (delta: 305.9 kB). Peak memory consumption was 70.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,087 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:34:12,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 692.32 ms. Allocated memory is still 155.2 MB. Free memory was 108.4 MB in the beginning and 119.6 MB in the end (delta: -11.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.01 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 117.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,088 INFO L168 Benchmark]: Boogie Preprocessor took 29.21 ms. Allocated memory is still 155.2 MB. Free memory was 117.7 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,088 INFO L168 Benchmark]: RCFGBuilder took 505.58 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 96.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,088 INFO L168 Benchmark]: TraceAbstraction took 253439.64 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 95.9 MB in the beginning and 108.8 MB in the end (delta: -12.8 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:34:12,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 692.32 ms. Allocated memory is still 155.2 MB. Free memory was 108.4 MB in the beginning and 119.6 MB in the end (delta: -11.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.01 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 117.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.21 ms. Allocated memory is still 155.2 MB. Free memory was 117.7 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 505.58 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 96.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 253439.64 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 95.9 MB in the beginning and 108.8 MB in the end (delta: -12.8 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 6.1s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (133states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 253.2s, OverallIterations: 83, TraceHistogramMax: 17, AutomataDifference: 168.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 1297 SDtfs, 7256 SDslu, 8132 SDs, 0 SdLazy, 10024 SolverSat, 7341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6124 GetRequests, 1842 SyntacticMatches, 62 SemanticMatches, 4219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75330 ImplicationChecksByTransitivity, 184.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 82 MinimizatonAttempts, 3178 StatesRemovedByMinimization, 81 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 49.9s InterpolantComputationTime, 4132 NumberOfCodeBlocks, 4132 NumberOfCodeBlocksAsserted, 512 NumberOfCheckSat, 3971 ConstructedInterpolants, 0 QuantifiedInterpolants, 462199 SizeOfPredicates, 1436 NumberOfNonLiveVariables, 13184 ConjunctsInSsa, 1759 ConjunctsInUnsatCore, 161 InterpolantComputations, 5 PerfectInterpolantSequences, 0/14688 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown