/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 14:52:32,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 14:52:32,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 14:52:32,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 14:52:32,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 14:52:32,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 14:52:32,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 14:52:32,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 14:52:32,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 14:52:32,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 14:52:32,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 14:52:32,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 14:52:32,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 14:52:32,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 14:52:32,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 14:52:32,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 14:52:32,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 14:52:32,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 14:52:32,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 14:52:32,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 14:52:32,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 14:52:32,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 14:52:32,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 14:52:32,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 14:52:32,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 14:52:32,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 14:52:32,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 14:52:32,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 14:52:32,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 14:52:32,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 14:52:32,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 14:52:32,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 14:52:32,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 14:52:32,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 14:52:32,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 14:52:32,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 14:52:32,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 14:52:32,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 14:52:32,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 14:52:32,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 14:52:32,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 14:52:32,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-11-09 14:52:32,850 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 14:52:32,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 14:52:32,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 14:52:32,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 14:52:32,852 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 14:52:32,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 14:52:32,852 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 14:52:32,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 14:52:32,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 14:52:32,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 14:52:32,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 14:52:32,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 14:52:32,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 14:52:32,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 14:52:32,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 14:52:32,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 14:52:32,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 14:52:32,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 14:52:32,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 14:52:32,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 14:52:32,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 14:52:32,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 14:52:32,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 14:52:32,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 14:52:32,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 14:52:32,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 14:52:32,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 14:52:32,859 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-11-09 14:52:32,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 14:52:32,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 14:52:32,860 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 14:52:33,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 14:52:33,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 14:52:33,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 14:52:33,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 14:52:33,285 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 14:52:33,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 14:52:33,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245ea62a6/750254e4a15840d3935ff6665662c1a2/FLAG08aabeeb2 [2020-11-09 14:52:34,245 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 14:52:34,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 14:52:34,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245ea62a6/750254e4a15840d3935ff6665662c1a2/FLAG08aabeeb2 [2020-11-09 14:52:34,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245ea62a6/750254e4a15840d3935ff6665662c1a2 [2020-11-09 14:52:34,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 14:52:34,521 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 14:52:34,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 14:52:34,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 14:52:34,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 14:52:34,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c02bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34, skipping insertion in model container [2020-11-09 14:52:34,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 14:52:34,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 14:52:35,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 14:52:35,111 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 14:52:35,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 14:52:35,355 INFO L208 MainTranslator]: Completed translation [2020-11-09 14:52:35,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35 WrapperNode [2020-11-09 14:52:35,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 14:52:35,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 14:52:35,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 14:52:35,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 14:52:35,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 14:52:35,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 14:52:35,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 14:52:35,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 14:52:35,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (1/1) ... [2020-11-09 14:52:35,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 14:52:35,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 14:52:35,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 14:52:35,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 14:52:35,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (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 14:52:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 14:52:35,609 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 14:52:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 14:52:35,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 14:52:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 14:52:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 14:52:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 14:52:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 14:52:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 14:52:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 14:52:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 14:52:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 14:52:35,618 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 14:52:36,077 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 14:52:36,078 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 14:52:36,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:52:36 BoogieIcfgContainer [2020-11-09 14:52:36,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 14:52:36,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 14:52:36,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 14:52:36,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 14:52:36,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:52:34" (1/3) ... [2020-11-09 14:52:36,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27df24ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:52:36, skipping insertion in model container [2020-11-09 14:52:36,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:35" (2/3) ... [2020-11-09 14:52:36,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27df24ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:52:36, skipping insertion in model container [2020-11-09 14:52:36,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:52:36" (3/3) ... [2020-11-09 14:52:36,090 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-11-09 14:52:36,107 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 14:52:36,108 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 14:52:36,112 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 14:52:36,113 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 14:52:36,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,148 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,149 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,149 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,150 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,150 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,154 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,155 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,155 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,156 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,158 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,158 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,159 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,159 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,165 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,165 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,165 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,166 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,166 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,166 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:36,168 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 14:52:36,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 14:52:36,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 14:52:36,208 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 14:52:36,208 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 14:52:36,208 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-11-09 14:52:36,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 14:52:36,208 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 14:52:36,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 14:52:36,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 14:52:36,221 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 14:52:36,222 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:36,226 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:36,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:36,279 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 14:52:36,280 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 14:52:36,285 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 14:52:36,288 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 14:52:38,256 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 14:52:38,420 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 14:52:39,169 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 14:52:39,278 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 14:52:39,522 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 14:52:39,643 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 14:52:40,053 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 14:52:40,212 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 14:52:40,530 WARN L194 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 14:52:40,683 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 14:52:40,725 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 14:52:40,725 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 14:52:40,731 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 14:52:40,741 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 14:52:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 14:52:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 14:52:40,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:40,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 14:52:40,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:40,754 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 14:52:40,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:40,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830600908] [2020-11-09 14:52:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:41,019 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 14:52:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830600908] [2020-11-09 14:52:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 14:52:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [757818265] [2020-11-09 14:52:41,023 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:41,026 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:41,041 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-11-09 14:52:41,041 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:41,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 14:52:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 14:52:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 14:52:41,069 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 14:52:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:41,139 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 14:52:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 14:52:41,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 14:52:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:41,152 INFO L225 Difference]: With dead ends: 75 [2020-11-09 14:52:41,153 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 14:52:41,154 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 14:52:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 14:52:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 14:52:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 14:52:41,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 14:52:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:41,198 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 14:52:41,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 14:52:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 14:52:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 14:52:41,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:41,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:41,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 14:52:41,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 14:52:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:41,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752182212] [2020-11-09 14:52:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:41,346 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 14:52:41,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752182212] [2020-11-09 14:52:41,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:41,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 14:52:41,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [5255913] [2020-11-09 14:52:41,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:41,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:41,353 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-11-09 14:52:41,353 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:41,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 14:52:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 14:52:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 14:52:41,385 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 14:52:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:41,427 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 14:52:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 14:52:41,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 14:52:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:41,430 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:41,430 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:41,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 14:52:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 14:52:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 14:52:41,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 14:52:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:41,441 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 14:52:41,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 14:52:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 14:52:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 14:52:41,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:41,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:41,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 14:52:41,442 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 14:52:41,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:41,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264225711] [2020-11-09 14:52:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:41,534 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 14:52:41,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264225711] [2020-11-09 14:52:41,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:41,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 14:52:41,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1135946672] [2020-11-09 14:52:41,536 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:41,537 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:41,540 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-11-09 14:52:41,541 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,549 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,549 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,579 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,579 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,610 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,611 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,628 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:41,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:41,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 14:52:41,630 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-11-09 14:52:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:41,754 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-11-09 14:52:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 14:52:41,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 14:52:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:41,756 INFO L225 Difference]: With dead ends: 66 [2020-11-09 14:52:41,756 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:41,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 14:52:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 14:52:41,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-11-09 14:52:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:41,765 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 14:52:41,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 14:52:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 14:52:41,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:41,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:41,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 14:52:41,766 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-11-09 14:52:41,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:41,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906431374] [2020-11-09 14:52:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:41,925 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 14:52:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906431374] [2020-11-09 14:52:41,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:41,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 14:52:41,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1359604629] [2020-11-09 14:52:41,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:41,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:41,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-11-09 14:52:41,934 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,971 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,971 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:42,022 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:42,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 14:52:42,025 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-11-09 14:52:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:42,136 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-11-09 14:52:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 14:52:42,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 14:52:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:42,140 INFO L225 Difference]: With dead ends: 67 [2020-11-09 14:52:42,140 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 14:52:42,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 14:52:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-11-09 14:52:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-09 14:52:42,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-11-09 14:52:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:42,157 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-09 14:52:42,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-09 14:52:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 14:52:42,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:42,162 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:42,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 14:52:42,163 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-11-09 14:52:42,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:42,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123473593] [2020-11-09 14:52:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:42,280 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 14:52:42,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123473593] [2020-11-09 14:52:42,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955011480] [2020-11-09 14:52:42,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 14:52:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 14:52:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:42,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:42,597 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 14:52:42,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:42,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 14:52:42,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [679302069] [2020-11-09 14:52:42,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:42,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:42,602 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-11-09 14:52:42,602 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:42,626 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:42,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 14:52:42,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:42,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 14:52:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:42,628 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-11-09 14:52:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:42,778 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 14:52:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:42,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 14:52:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:42,780 INFO L225 Difference]: With dead ends: 63 [2020-11-09 14:52:42,780 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 14:52:42,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 14:52:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 14:52:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 14:52:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 14:52:42,788 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 14:52:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:42,788 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 14:52:42,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 14:52:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 14:52:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 14:52:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:42,790 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:42,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,991 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-11-09 14:52:42,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101684759] [2020-11-09 14:52:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:43,099 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 14:52:43,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101684759] [2020-11-09 14:52:43,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784921160] [2020-11-09 14:52:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:43,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 14:52:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:43,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:43,243 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 14:52:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:43,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 14:52:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245042615] [2020-11-09 14:52:43,247 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:43,251 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:43,254 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-11-09 14:52:43,256 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:43,301 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:43,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:43,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 14:52:43,305 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-11-09 14:52:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:43,431 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 14:52:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 14:52:43,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-11-09 14:52:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:43,433 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:43,433 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 14:52:43,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 14:52:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 14:52:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 14:52:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 14:52:43,448 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 14:52:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:43,448 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 14:52:43,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 14:52:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:43,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:43,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:43,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,664 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-11-09 14:52:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:43,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211121706] [2020-11-09 14:52:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:43,763 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 14:52:43,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211121706] [2020-11-09 14:52:43,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362420884] [2020-11-09 14:52:43,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:43,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 14:52:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:43,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:43,839 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 14:52:43,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:43,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 14:52:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360846599] [2020-11-09 14:52:43,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:43,842 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:43,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-11-09 14:52:43,845 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:43,847 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:43,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:43,867 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:43,867 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:43,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:43,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:43,903 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:43,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:43,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:43,905 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-11-09 14:52:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:44,045 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 14:52:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:44,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 14:52:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:44,047 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:44,047 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:44,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-09 14:52:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 14:52:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-09 14:52:44,053 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-11-09 14:52:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:44,054 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-09 14:52:44,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-09 14:52:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:44,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:44,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:44,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,267 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-11-09 14:52:44,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:44,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529365479] [2020-11-09 14:52:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:44,359 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 14:52:44,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529365479] [2020-11-09 14:52:44,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662264217] [2020-11-09 14:52:44,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 14:52:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 14:52:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:44,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:44,466 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 14:52:44,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:44,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 14:52:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1887498738] [2020-11-09 14:52:44,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:44,468 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:44,471 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-11-09 14:52:44,471 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:44,487 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:44,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 14:52:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 14:52:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:44,488 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-11-09 14:52:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:44,690 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 14:52:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 14:52:44,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 14:52:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:44,692 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:44,693 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 14:52:44,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:52:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 14:52:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-11-09 14:52:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 14:52:44,699 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-11-09 14:52:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:44,699 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 14:52:44,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 14:52:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 14:52:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:44,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:44,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:44,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,912 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-11-09 14:52:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:44,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990545265] [2020-11-09 14:52:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:45,000 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 14:52:45,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990545265] [2020-11-09 14:52:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077300104] [2020-11-09 14:52:45,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 14:52:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:45,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:45,153 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 14:52:45,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:45,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 14:52:45,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1062689247] [2020-11-09 14:52:45,154 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:45,155 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:45,158 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-11-09 14:52:45,159 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:45,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:45,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:45,195 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-11-09 14:52:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:45,378 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 14:52:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:45,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 14:52:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:45,379 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:45,380 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 14:52:45,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 14:52:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-09 14:52:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-09 14:52:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-09 14:52:45,385 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-11-09 14:52:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:45,385 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-09 14:52:45,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-09 14:52:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 14:52:45,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:45,386 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:45,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:45,598 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:45,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-11-09 14:52:45,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:45,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637888498] [2020-11-09 14:52:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:45,663 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 14:52:45,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637888498] [2020-11-09 14:52:45,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274078753] [2020-11-09 14:52:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:45,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:45,757 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 14:52:45,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:45,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 14:52:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801620206] [2020-11-09 14:52:45,758 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:45,763 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:45,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-11-09 14:52:45,767 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:45,800 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:45,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 14:52:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 14:52:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:45,801 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-11-09 14:52:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:46,042 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 14:52:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:46,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 14:52:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:46,044 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:46,044 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 14:52:46,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:52:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 14:52:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 14:52:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 14:52:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 14:52:46,049 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 14:52:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:46,050 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 14:52:46,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 14:52:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 14:52:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 14:52:46,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:46,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:46,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,265 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-11-09 14:52:46,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:46,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435381691] [2020-11-09 14:52:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:46,383 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 14:52:46,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435381691] [2020-11-09 14:52:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921794916] [2020-11-09 14:52:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 14:52:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 14:52:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:46,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:46,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:46,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 14:52:46,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1480084396] [2020-11-09 14:52:46,506 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:46,507 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:46,511 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-11-09 14:52:46,512 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:46,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:46,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:46,547 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 14:52:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:46,772 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 14:52:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 14:52:46,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-09 14:52:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:46,773 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:46,773 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 14:52:46,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:52:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 14:52:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 14:52:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 14:52:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 14:52:46,778 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 14:52:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:46,779 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 14:52:46,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 14:52:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:46,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:46,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,990 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-11-09 14:52:46,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:46,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835330205] [2020-11-09 14:52:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:47,102 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 14:52:47,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835330205] [2020-11-09 14:52:47,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494312998] [2020-11-09 14:52:47,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:47,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:47,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:47,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:47,179 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 14:52:47,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:47,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 14:52:47,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [282196877] [2020-11-09 14:52:47,180 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:47,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:47,184 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-11-09 14:52:47,184 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:47,192 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:47,192 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:47,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:47,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:47,228 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:47,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:47,239 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:47,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:47,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:47,240 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-11-09 14:52:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:47,409 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 14:52:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 14:52:47,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 14:52:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:47,410 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:47,410 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 14:52:47,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:52:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 14:52:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-09 14:52:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 14:52:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-11-09 14:52:47,415 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-11-09 14:52:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:47,415 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-11-09 14:52:47,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-11-09 14:52:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:47,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 14:52:47,627 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:47,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-11-09 14:52:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:47,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130900669] [2020-11-09 14:52:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:47,775 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 14:52:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130900669] [2020-11-09 14:52:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787163889] [2020-11-09 14:52:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:47,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 14:52:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:47,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:47,882 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 14:52:47,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:47,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 14:52:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1981944313] [2020-11-09 14:52:47,884 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:47,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:47,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-11-09 14:52:47,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:47,904 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:47,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 14:52:47,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 14:52:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:47,905 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-11-09 14:52:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:48,205 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-11-09 14:52:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 14:52:48,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 14:52:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:48,207 INFO L225 Difference]: With dead ends: 74 [2020-11-09 14:52:48,207 INFO L226 Difference]: Without dead ends: 69 [2020-11-09 14:52:48,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:52:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-09 14:52:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-11-09 14:52:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 14:52:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-11-09 14:52:48,212 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-11-09 14:52:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:48,213 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-11-09 14:52:48,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 14:52:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-11-09 14:52:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:48,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:48,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:48,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:48,423 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:48,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-11-09 14:52:48,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:48,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855112516] [2020-11-09 14:52:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:48,497 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 14:52:48,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855112516] [2020-11-09 14:52:48,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567096758] [2020-11-09 14:52:48,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:48,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 14:52:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:48,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:48,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:48,623 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 14:52:48,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:48,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 14:52:48,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372949574] [2020-11-09 14:52:48,624 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:48,628 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:48,634 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-11-09 14:52:48,634 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:48,676 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 14:52:48,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-09 14:52:48,678 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-11-09 14:52:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:48,959 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 14:52:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:48,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 14:52:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:48,960 INFO L225 Difference]: With dead ends: 82 [2020-11-09 14:52:48,961 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 14:52:48,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:52:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 14:52:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-09 14:52:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 14:52:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-11-09 14:52:48,986 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-11-09 14:52:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:48,987 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-11-09 14:52:48,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-11-09 14:52:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 14:52:48,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:48,988 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:49,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:49,189 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-11-09 14:52:49,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:49,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365795785] [2020-11-09 14:52:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:49,288 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 14:52:49,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365795785] [2020-11-09 14:52:49,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326095145] [2020-11-09 14:52:49,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:49,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:49,401 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 14:52:49,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:49,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 14:52:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [847212805] [2020-11-09 14:52:49,402 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:49,404 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:49,409 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-11-09 14:52:49,409 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:49,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:49,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 14:52:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 14:52:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:49,442 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-11-09 14:52:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:49,787 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 14:52:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:52:49,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 14:52:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:49,788 INFO L225 Difference]: With dead ends: 82 [2020-11-09 14:52:49,788 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 14:52:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:52:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 14:52:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 14:52:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 14:52:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 14:52:49,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 14:52:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:49,799 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 14:52:49,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 14:52:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 14:52:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 14:52:49,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:49,800 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:50,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 14:52:50,011 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-11-09 14:52:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157447414] [2020-11-09 14:52:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:50,105 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 14:52:50,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157447414] [2020-11-09 14:52:50,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541819829] [2020-11-09 14:52:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:50,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:50,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:50,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:50,203 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 14:52:50,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:50,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 14:52:50,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [757247744] [2020-11-09 14:52:50,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:50,206 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:50,209 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-11-09 14:52:50,209 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:50,231 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:50,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 14:52:50,232 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 14:52:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:50,548 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 14:52:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 14:52:50,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-09 14:52:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:50,549 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:50,549 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 14:52:50,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:52:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 14:52:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 14:52:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 14:52:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 14:52:50,554 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 14:52:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:50,554 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 14:52:50,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 14:52:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:50,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:50,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:50,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 14:52:50,765 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-11-09 14:52:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:50,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447146741] [2020-11-09 14:52:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:50,895 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 14:52:50,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447146741] [2020-11-09 14:52:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464921452] [2020-11-09 14:52:50,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 14:52:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:50,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:50,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:50,976 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 14:52:50,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:50,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 14:52:50,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1799960452] [2020-11-09 14:52:50,977 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:50,978 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:50,981 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-11-09 14:52:50,981 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:50,999 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:50,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:51,019 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:51,019 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:51,033 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:51,034 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:51,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:51,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:51,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:51,047 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-11-09 14:52:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:51,267 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 14:52:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:51,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 14:52:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:51,268 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:51,268 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 14:52:51,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:52:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 14:52:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-09 14:52:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 14:52:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-11-09 14:52:51,272 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-11-09 14:52:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:51,272 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-11-09 14:52:51,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-11-09 14:52:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:51,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:51,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:51,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 14:52:51,482 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-11-09 14:52:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552277939] [2020-11-09 14:52:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:51,587 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 14:52:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552277939] [2020-11-09 14:52:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487683968] [2020-11-09 14:52:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:51,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 14:52:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:51,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:51,688 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 14:52:51,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:51,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 14:52:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1987034903] [2020-11-09 14:52:51,689 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:51,690 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:51,692 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-11-09 14:52:51,693 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:51,700 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:51,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 14:52:51,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 14:52:51,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:51,701 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-11-09 14:52:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:52,063 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-11-09 14:52:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 14:52:52,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 14:52:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:52,065 INFO L225 Difference]: With dead ends: 84 [2020-11-09 14:52:52,065 INFO L226 Difference]: Without dead ends: 79 [2020-11-09 14:52:52,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:52:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-09 14:52:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-11-09 14:52:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 14:52:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-11-09 14:52:52,071 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-11-09 14:52:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:52,071 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-11-09 14:52:52,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 14:52:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-11-09 14:52:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:52,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:52,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:52,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:52,283 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:52,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-11-09 14:52:52,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:52,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293492226] [2020-11-09 14:52:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:52,387 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 14:52:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293492226] [2020-11-09 14:52:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006955896] [2020-11-09 14:52:52,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:52,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 14:52:52,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 14:52:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:52,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:52,481 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 14:52:52,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:52,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 14:52:52,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1144331542] [2020-11-09 14:52:52,482 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:52,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:52,486 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-11-09 14:52:52,487 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:52,515 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:52,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:52,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-09 14:52:52,517 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-11-09 14:52:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:52,920 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 14:52:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:52:52,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 14:52:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:52,922 INFO L225 Difference]: With dead ends: 92 [2020-11-09 14:52:52,923 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:52,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:52:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-11-09 14:52:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-09 14:52:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-11-09 14:52:52,927 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-11-09 14:52:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:52,927 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-11-09 14:52:52,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-11-09 14:52:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 14:52:52,928 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:52,928 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:53,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:53,139 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-11-09 14:52:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:53,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447252316] [2020-11-09 14:52:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:53,248 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 14:52:53,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447252316] [2020-11-09 14:52:53,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086720600] [2020-11-09 14:52:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:53,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-09 14:52:53,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:53,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:53,359 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 14:52:53,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:53,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 14:52:53,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487212130] [2020-11-09 14:52:53,360 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:53,362 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:53,365 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-11-09 14:52:53,366 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:53,398 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 14:52:53,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 14:52:53,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:53,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 14:52:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:53,399 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-11-09 14:52:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:53,865 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 14:52:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:52:53,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 14:52:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:53,872 INFO L225 Difference]: With dead ends: 92 [2020-11-09 14:52:53,872 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:53,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:52:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 14:52:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 14:52:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 14:52:53,879 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 14:52:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:53,879 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 14:52:53,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 14:52:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 14:52:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 14:52:53,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:53,880 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:54,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:54,081 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-11-09 14:52:54,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:54,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988456158] [2020-11-09 14:52:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:54,203 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 14:52:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988456158] [2020-11-09 14:52:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891083678] [2020-11-09 14:52:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:54,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:54,299 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 14:52:54,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:54,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 14:52:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1633620633] [2020-11-09 14:52:54,300 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:54,301 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:54,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-11-09 14:52:54,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:54,318 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:54,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:54,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 14:52:54,319 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 14:52:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:54,751 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 14:52:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 14:52:54,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-09 14:52:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:54,753 INFO L225 Difference]: With dead ends: 80 [2020-11-09 14:52:54,753 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 14:52:54,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:52:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 14:52:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 14:52:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 14:52:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 14:52:54,757 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 14:52:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:54,758 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 14:52:54,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 14:52:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:54,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:54,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:54,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 14:52:54,969 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-11-09 14:52:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:54,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156796076] [2020-11-09 14:52:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:55,117 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 14:52:55,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156796076] [2020-11-09 14:52:55,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326531647] [2020-11-09 14:52:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:55,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:55,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:55,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:55,194 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 14:52:55,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:55,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 14:52:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1618588003] [2020-11-09 14:52:55,194 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:55,196 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:55,199 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-11-09 14:52:55,199 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:55,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:55,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:55,225 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:55,226 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:55,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:55,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:55,253 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:55,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:55,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:55,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:55,254 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-11-09 14:52:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:55,547 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 14:52:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 14:52:55,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 14:52:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:55,549 INFO L225 Difference]: With dead ends: 80 [2020-11-09 14:52:55,550 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 14:52:55,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:52:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 14:52:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-11-09 14:52:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 14:52:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-09 14:52:55,554 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-11-09 14:52:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:55,554 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-09 14:52:55,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-09 14:52:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:55,554 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:55,555 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:55,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 14:52:55,766 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:55,766 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-11-09 14:52:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736627089] [2020-11-09 14:52:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:55,864 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 14:52:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736627089] [2020-11-09 14:52:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735402218] [2020-11-09 14:52:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:55,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 14:52:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 14:52:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:55,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:55,972 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 14:52:55,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:55,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 14:52:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99188892] [2020-11-09 14:52:55,973 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:55,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:55,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-11-09 14:52:55,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:55,987 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:55,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 14:52:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 14:52:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:55,989 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-11-09 14:52:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:56,469 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-11-09 14:52:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 14:52:56,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 14:52:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:56,471 INFO L225 Difference]: With dead ends: 94 [2020-11-09 14:52:56,471 INFO L226 Difference]: Without dead ends: 89 [2020-11-09 14:52:56,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:52:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-09 14:52:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-11-09 14:52:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 14:52:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-11-09 14:52:56,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-11-09 14:52:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:56,476 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-11-09 14:52:56,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 14:52:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-11-09 14:52:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:56,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:56,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 14:52:56,680 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-11-09 14:52:56,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:56,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517988413] [2020-11-09 14:52:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:56,780 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 14:52:56,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517988413] [2020-11-09 14:52:56,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731177169] [2020-11-09 14:52:56,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:56,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 14:52:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:56,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:56,886 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 14:52:56,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:56,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 14:52:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [967527488] [2020-11-09 14:52:56,887 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:56,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:56,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-11-09 14:52:56,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:56,923 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 14:52:56,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:56,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:56,924 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-11-09 14:52:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:57,433 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 14:52:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:52:57,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 14:52:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:57,434 INFO L225 Difference]: With dead ends: 102 [2020-11-09 14:52:57,434 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 14:52:57,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:52:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 14:52:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-11-09 14:52:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 14:52:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-11-09 14:52:57,439 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-11-09 14:52:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:57,439 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-11-09 14:52:57,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-11-09 14:52:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 14:52:57,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:57,440 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:57,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 14:52:57,649 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-11-09 14:52:57,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:57,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605527472] [2020-11-09 14:52:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:57,758 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 14:52:57,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605527472] [2020-11-09 14:52:57,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118038854] [2020-11-09 14:52:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:57,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-09 14:52:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:57,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:57,861 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 14:52:57,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:57,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 14:52:57,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55460660] [2020-11-09 14:52:57,862 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:57,864 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:57,868 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-11-09 14:52:57,868 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:57,887 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:57,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 14:52:57,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 14:52:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:57,888 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-11-09 14:52:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:58,475 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 14:52:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:52:58,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 14:52:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:58,476 INFO L225 Difference]: With dead ends: 102 [2020-11-09 14:52:58,476 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 14:52:58,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:52:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 14:52:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 14:52:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 14:52:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 14:52:58,480 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 14:52:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:58,480 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 14:52:58,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 14:52:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 14:52:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 14:52:58,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:58,481 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:58,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 14:52:58,682 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-11-09 14:52:58,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:58,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665509110] [2020-11-09 14:52:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:58,789 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 14:52:58,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665509110] [2020-11-09 14:52:58,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233602458] [2020-11-09 14:52:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:58,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 14:52:58,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:58,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:58,897 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 14:52:58,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:58,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 14:52:58,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [922706466] [2020-11-09 14:52:58,898 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:58,902 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:58,906 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-11-09 14:52:58,906 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:58,917 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:58,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:58,918 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 14:52:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:59,460 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 14:52:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 14:52:59,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-11-09 14:52:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:59,462 INFO L225 Difference]: With dead ends: 88 [2020-11-09 14:52:59,462 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:59,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:52:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 14:52:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 14:52:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 14:52:59,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 14:52:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:59,466 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 14:52:59,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 14:52:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:52:59,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:59,468 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:59,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:59,677 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-11-09 14:52:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:59,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503152022] [2020-11-09 14:52:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:59,847 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 14:52:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503152022] [2020-11-09 14:52:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699611581] [2020-11-09 14:52:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:52:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:59,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:59,919 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 14:52:59,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:59,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 14:52:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [214138302] [2020-11-09 14:52:59,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:59,922 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:59,927 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-11-09 14:52:59,927 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:59,929 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:59,929 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:59,953 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:59,954 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:59,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:59,971 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:59,985 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:52:59,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:52:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:52:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:59,986 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-11-09 14:53:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:00,355 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 14:53:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:53:00,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 14:53:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:00,356 INFO L225 Difference]: With dead ends: 88 [2020-11-09 14:53:00,357 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 14:53:00,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:53:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 14:53:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-11-09 14:53:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 14:53:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-11-09 14:53:00,360 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-11-09 14:53:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:00,361 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-11-09 14:53:00,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:53:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-11-09 14:53:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:53:00,361 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:00,361 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:00,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-09 14:53:00,562 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-11-09 14:53:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:00,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335629842] [2020-11-09 14:53:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:00,692 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 14:53:00,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335629842] [2020-11-09 14:53:00,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503598916] [2020-11-09 14:53:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:00,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 14:53:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:00,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:00,794 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 14:53:00,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:00,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 14:53:00,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1321710494] [2020-11-09 14:53:00,795 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:00,797 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:00,802 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-11-09 14:53:00,802 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:00,807 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:00,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 14:53:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 14:53:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:53:00,810 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-11-09 14:53:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:01,383 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-11-09 14:53:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 14:53:01,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 14:53:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:01,385 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:53:01,385 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 14:53:01,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:53:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 14:53:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-11-09 14:53:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 14:53:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-11-09 14:53:01,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-11-09 14:53:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:01,389 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-11-09 14:53:01,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 14:53:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-11-09 14:53:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:53:01,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:01,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:01,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:01,591 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-11-09 14:53:01,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:01,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986859623] [2020-11-09 14:53:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:01,744 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 14:53:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986859623] [2020-11-09 14:53:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491226972] [2020-11-09 14:53:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:01,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 14:53:01,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:53:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:01,856 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 14:53:01,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 14:53:01,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1415033982] [2020-11-09 14:53:01,857 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:01,859 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:01,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-11-09 14:53:01,862 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:01,895 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:01,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:53:01,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:53:01,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:53:01,897 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-11-09 14:53:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:02,514 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 14:53:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:53:02,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 14:53:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:02,516 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:02,517 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 14:53:02,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:53:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 14:53:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-11-09 14:53:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-09 14:53:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-11-09 14:53:02,521 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-11-09 14:53:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:02,522 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-11-09 14:53:02,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:53:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-11-09 14:53:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 14:53:02,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:02,522 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:02,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 14:53:02,726 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-11-09 14:53:02,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:02,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043251951] [2020-11-09 14:53:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:02,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043251951] [2020-11-09 14:53:02,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719963602] [2020-11-09 14:53:02,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:02,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:53:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:02,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:02,986 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 14:53:02,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:02,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 14:53:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [781191014] [2020-11-09 14:53:02,987 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:02,989 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:02,992 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-11-09 14:53:02,993 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:03,013 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 14:53:03,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 14:53:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 14:53:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:03,015 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-11-09 14:53:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:03,709 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 14:53:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:03,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 14:53:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:03,711 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:03,711 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 14:53:03,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 14:53:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 14:53:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 14:53:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 14:53:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 14:53:03,716 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 14:53:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:03,716 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 14:53:03,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 14:53:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 14:53:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 14:53:03,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:03,717 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:03,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:03,928 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-11-09 14:53:03,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:03,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076487062] [2020-11-09 14:53:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:04,062 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 14:53:04,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076487062] [2020-11-09 14:53:04,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125309251] [2020-11-09 14:53:04,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:04,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 14:53:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:53:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:04,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:04,163 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 14:53:04,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:04,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 14:53:04,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838490752] [2020-11-09 14:53:04,164 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:04,166 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:04,170 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-11-09 14:53:04,171 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:04,187 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:04,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:53:04,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:53:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:53:04,188 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 14:53:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:04,834 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 14:53:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 14:53:04,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-11-09 14:53:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:04,835 INFO L225 Difference]: With dead ends: 96 [2020-11-09 14:53:04,835 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 14:53:04,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:53:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 14:53:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 14:53:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 14:53:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 14:53:04,842 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 14:53:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:04,842 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 14:53:04,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:53:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 14:53:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:04,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:04,843 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:05,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-09 14:53:05,053 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-11-09 14:53:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:05,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512016901] [2020-11-09 14:53:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512016901] [2020-11-09 14:53:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62730311] [2020-11-09 14:53:05,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:05,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 14:53:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 14:53:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:05,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:05,346 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 14:53:05,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:05,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 14:53:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1710020984] [2020-11-09 14:53:05,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:05,350 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:05,356 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-11-09 14:53:05,356 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:05,361 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:05,361 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:05,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:05,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:05,428 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:05,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:05,447 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:05,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:05,449 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-11-09 14:53:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:05,884 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 14:53:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 14:53:05,884 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 14:53:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:05,886 INFO L225 Difference]: With dead ends: 96 [2020-11-09 14:53:05,886 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 14:53:05,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:53:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 14:53:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-09 14:53:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 14:53:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-11-09 14:53:05,889 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-11-09 14:53:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:05,889 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-11-09 14:53:05,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-11-09 14:53:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:05,890 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:06,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:06,092 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-11-09 14:53:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:06,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494293759] [2020-11-09 14:53:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:06,269 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 14:53:06,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494293759] [2020-11-09 14:53:06,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926145734] [2020-11-09 14:53:06,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 14:53:06,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:06,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:06,365 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 14:53:06,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:06,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 14:53:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [633969399] [2020-11-09 14:53:06,366 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:06,369 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:06,374 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-11-09 14:53:06,374 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:06,381 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:06,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 14:53:06,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 14:53:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:06,382 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-11-09 14:53:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:07,147 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-11-09 14:53:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 14:53:07,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 14:53:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:07,149 INFO L225 Difference]: With dead ends: 114 [2020-11-09 14:53:07,149 INFO L226 Difference]: Without dead ends: 109 [2020-11-09 14:53:07,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 14:53:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-09 14:53:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-09 14:53:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-09 14:53:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-11-09 14:53:07,153 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-11-09 14:53:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:07,154 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-11-09 14:53:07,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 14:53:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-11-09 14:53:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:07,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:07,155 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:07,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-09 14:53:07,365 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-11-09 14:53:07,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:07,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431686831] [2020-11-09 14:53:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:07,536 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 14:53:07,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431686831] [2020-11-09 14:53:07,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560404022] [2020-11-09 14:53:07,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:07,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:07,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 14:53:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:07,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:07,655 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 14:53:07,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:07,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 14:53:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440589198] [2020-11-09 14:53:07,656 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:07,658 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:07,664 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-11-09 14:53:07,664 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:07,703 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:07,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-11-09 14:53:07,705 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-11-09 14:53:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:08,490 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 14:53:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:08,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 14:53:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:08,492 INFO L225 Difference]: With dead ends: 122 [2020-11-09 14:53:08,492 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 14:53:08,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 14:53:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 14:53:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-11-09 14:53:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 14:53:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-11-09 14:53:08,497 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-11-09 14:53:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:08,497 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-11-09 14:53:08,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-11-09 14:53:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 14:53:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:08,498 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:08,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:08,699 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-11-09 14:53:08,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:08,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070162502] [2020-11-09 14:53:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:08,896 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 14:53:08,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070162502] [2020-11-09 14:53:08,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630157068] [2020-11-09 14:53:08,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:08,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-09 14:53:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:08,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:09,010 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 14:53:09,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:09,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 14:53:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487777764] [2020-11-09 14:53:09,011 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:09,013 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:09,019 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-11-09 14:53:09,019 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:09,053 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:09,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 14:53:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 14:53:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:09,055 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-11-09 14:53:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:09,939 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 14:53:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:53:09,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 14:53:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:09,947 INFO L225 Difference]: With dead ends: 122 [2020-11-09 14:53:09,947 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 14:53:09,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 14:53:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 14:53:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 14:53:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 14:53:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 14:53:09,952 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 14:53:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:09,952 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 14:53:09,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 14:53:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 14:53:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 14:53:09,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:09,953 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:10,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-09 14:53:10,163 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-11-09 14:53:10,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:10,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782367747] [2020-11-09 14:53:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:10,340 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 14:53:10,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782367747] [2020-11-09 14:53:10,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448679967] [2020-11-09 14:53:10,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:10,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 14:53:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:10,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:10,446 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 14:53:10,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:10,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 14:53:10,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073619950] [2020-11-09 14:53:10,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:10,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:10,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-11-09 14:53:10,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:10,471 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:10,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 14:53:10,473 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 14:53:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:11,331 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 14:53:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 14:53:11,337 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-11-09 14:53:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:11,338 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:53:11,338 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 14:53:11,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 14:53:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 14:53:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 14:53:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 14:53:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 14:53:11,342 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 14:53:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:11,342 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 14:53:11,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 14:53:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:11,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:11,343 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:11,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 14:53:11,552 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-11-09 14:53:11,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:11,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722860994] [2020-11-09 14:53:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:11,793 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 14:53:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722860994] [2020-11-09 14:53:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632491210] [2020-11-09 14:53:11,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:11,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 14:53:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 14:53:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:11,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:11,885 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 14:53:11,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:11,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 14:53:11,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2146536557] [2020-11-09 14:53:11,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:11,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:11,895 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-11-09 14:53:11,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:11,897 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:11,897 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:11,934 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:11,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:11,957 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:11,957 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:11,974 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:11,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:11,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:11,976 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-11-09 14:53:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:12,495 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 14:53:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:53:12,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 14:53:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:12,497 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:53:12,498 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 14:53:12,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:53:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 14:53:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-09 14:53:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 14:53:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-11-09 14:53:12,503 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-11-09 14:53:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:12,503 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-11-09 14:53:12,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-11-09 14:53:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:12,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:12,504 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:12,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 14:53:12,716 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-11-09 14:53:12,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:12,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616443767] [2020-11-09 14:53:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:12,905 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 14:53:12,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616443767] [2020-11-09 14:53:12,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435422255] [2020-11-09 14:53:12,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:12,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 14:53:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:13,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:13,015 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 14:53:13,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:13,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 14:53:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222668209] [2020-11-09 14:53:13,016 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:13,018 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:13,022 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-11-09 14:53:13,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:13,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:13,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 14:53:13,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 14:53:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:13,029 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-11-09 14:53:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:13,886 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-11-09 14:53:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 14:53:13,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 14:53:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:13,888 INFO L225 Difference]: With dead ends: 124 [2020-11-09 14:53:13,888 INFO L226 Difference]: Without dead ends: 119 [2020-11-09 14:53:13,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 14:53:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-09 14:53:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-11-09 14:53:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 14:53:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-11-09 14:53:13,894 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-11-09 14:53:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:13,894 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-11-09 14:53:13,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 14:53:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-11-09 14:53:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:13,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:13,895 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:14,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 14:53:14,105 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-11-09 14:53:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:14,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528375503] [2020-11-09 14:53:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:14,323 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 14:53:14,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528375503] [2020-11-09 14:53:14,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307783584] [2020-11-09 14:53:14,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:14,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:14,429 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 14:53:14,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:14,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 14:53:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242503044] [2020-11-09 14:53:14,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:14,432 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:14,437 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-11-09 14:53:14,437 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:14,467 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:14,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:14,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:53:14,468 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-11-09 14:53:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:15,420 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 14:53:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:53:15,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 14:53:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:15,421 INFO L225 Difference]: With dead ends: 132 [2020-11-09 14:53:15,422 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:15,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 14:53:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-11-09 14:53:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-09 14:53:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-11-09 14:53:15,426 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-11-09 14:53:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:15,427 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-11-09 14:53:15,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-11-09 14:53:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 14:53:15,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:15,427 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:15,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 14:53:15,640 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-11-09 14:53:15,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:15,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873899929] [2020-11-09 14:53:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:15,854 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 14:53:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873899929] [2020-11-09 14:53:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948856212] [2020-11-09 14:53:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:15,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:15,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:53:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:15,965 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 14:53:15,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:15,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 14:53:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [389826336] [2020-11-09 14:53:15,966 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:15,969 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:15,975 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-11-09 14:53:15,976 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:16,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:16,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 14:53:16,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 14:53:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:16,003 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-11-09 14:53:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:17,020 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 14:53:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:53:17,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 14:53:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:17,022 INFO L225 Difference]: With dead ends: 132 [2020-11-09 14:53:17,022 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:17,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-11-09 14:53:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 14:53:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 14:53:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 14:53:17,028 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 14:53:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:17,028 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 14:53:17,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 14:53:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 14:53:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 14:53:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:17,032 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:17,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 14:53:17,243 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-11-09 14:53:17,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:17,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997242450] [2020-11-09 14:53:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:17,462 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 14:53:17,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997242450] [2020-11-09 14:53:17,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401492852] [2020-11-09 14:53:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:17,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 14:53:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 14:53:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:17,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:17,588 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 14:53:17,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:17,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 14:53:17,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1886107502] [2020-11-09 14:53:17,589 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:17,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:17,600 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-11-09 14:53:17,600 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:17,615 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:17,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:53:17,617 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 14:53:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:18,489 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 14:53:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 14:53:18,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-11-09 14:53:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:18,490 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:18,490 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 14:53:18,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 14:53:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 14:53:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 14:53:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 14:53:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 14:53:18,495 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 14:53:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:18,495 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 14:53:18,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 14:53:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:18,496 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:18,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 14:53:18,706 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:18,706 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-11-09 14:53:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:18,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811146805] [2020-11-09 14:53:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:18,996 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 14:53:18,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811146805] [2020-11-09 14:53:18,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565566209] [2020-11-09 14:53:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:19,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:19,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:19,074 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 14:53:19,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:19,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 14:53:19,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1022640999] [2020-11-09 14:53:19,074 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:19,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:19,085 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-11-09 14:53:19,085 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:19,090 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:19,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:19,122 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:19,122 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:19,143 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:19,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:19,169 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:19,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:19,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:19,170 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-11-09 14:53:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:19,741 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 14:53:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 14:53:19,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 14:53:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:19,742 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:19,743 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 14:53:19,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:53:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 14:53:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-11-09 14:53:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 14:53:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-11-09 14:53:19,747 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-11-09 14:53:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:19,747 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-11-09 14:53:19,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-11-09 14:53:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:19,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:19,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:19,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:19,960 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-11-09 14:53:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:19,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087201796] [2020-11-09 14:53:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:20,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087201796] [2020-11-09 14:53:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154265278] [2020-11-09 14:53:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:20,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 14:53:20,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:20,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:53:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:20,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:20,316 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 14:53:20,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:20,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 14:53:20,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1679527406] [2020-11-09 14:53:20,316 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:20,321 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:20,328 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-11-09 14:53:20,328 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:20,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:20,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 14:53:20,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:20,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 14:53:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:20,335 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-11-09 14:53:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:21,420 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-11-09 14:53:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 14:53:21,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 14:53:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:21,422 INFO L225 Difference]: With dead ends: 134 [2020-11-09 14:53:21,422 INFO L226 Difference]: Without dead ends: 129 [2020-11-09 14:53:21,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 14:53:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-09 14:53:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-11-09 14:53:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 14:53:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-11-09 14:53:21,427 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-11-09 14:53:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:21,427 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-11-09 14:53:21,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 14:53:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-11-09 14:53:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:21,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:21,428 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:21,638 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-11-09 14:53:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:21,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397422149] [2020-11-09 14:53:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:21,842 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 14:53:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397422149] [2020-11-09 14:53:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909147054] [2020-11-09 14:53:21,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:21,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 14:53:21,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:21,989 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 14:53:21,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:21,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 14:53:21,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088147822] [2020-11-09 14:53:21,990 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:21,993 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:21,998 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-11-09 14:53:21,999 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:22,039 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:22,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:53:22,040 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-11-09 14:53:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:23,192 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 14:53:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:53:23,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 14:53:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:23,194 INFO L225 Difference]: With dead ends: 142 [2020-11-09 14:53:23,194 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 14:53:23,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 14:53:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 14:53:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-11-09 14:53:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 14:53:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-11-09 14:53:23,199 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-11-09 14:53:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:23,199 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-11-09 14:53:23,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-11-09 14:53:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 14:53:23,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:23,200 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:23,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:23,409 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-11-09 14:53:23,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:23,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712991788] [2020-11-09 14:53:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:23,666 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 14:53:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712991788] [2020-11-09 14:53:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057333114] [2020-11-09 14:53:23,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:23,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:23,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:23,766 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 14:53:23,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:23,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 14:53:23,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [751351298] [2020-11-09 14:53:23,766 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:23,770 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:23,775 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-11-09 14:53:23,776 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:23,807 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:23,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 14:53:23,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 14:53:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:23,808 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-11-09 14:53:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:25,064 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 14:53:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:53:25,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 14:53:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:25,066 INFO L225 Difference]: With dead ends: 142 [2020-11-09 14:53:25,067 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 14:53:25,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-11-09 14:53:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 14:53:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 14:53:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 14:53:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 14:53:25,071 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 14:53:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:25,071 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 14:53:25,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 14:53:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 14:53:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 14:53:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:25,072 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:25,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-09 14:53:25,281 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-11-09 14:53:25,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:25,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966377527] [2020-11-09 14:53:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:25,506 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 14:53:25,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966377527] [2020-11-09 14:53:25,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469527440] [2020-11-09 14:53:25,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:25,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:25,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:25,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:25,645 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 14:53:25,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:25,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 14:53:25,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [553658812] [2020-11-09 14:53:25,646 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:25,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:25,659 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-11-09 14:53:25,659 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:25,677 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:25,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:25,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:53:25,679 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 14:53:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:26,908 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 14:53:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 14:53:26,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-11-09 14:53:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:26,910 INFO L225 Difference]: With dead ends: 120 [2020-11-09 14:53:26,910 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 14:53:26,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 14:53:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 14:53:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 14:53:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 14:53:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 14:53:26,915 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 14:53:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:26,915 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 14:53:26,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 14:53:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:26,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:26,916 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:27,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:27,126 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-11-09 14:53:27,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:27,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694288868] [2020-11-09 14:53:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:27,510 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 14:53:27,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694288868] [2020-11-09 14:53:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734529701] [2020-11-09 14:53:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:27,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 14:53:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 14:53:27,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:27,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:27,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:27,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 14:53:27,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976613461] [2020-11-09 14:53:27,610 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:27,614 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:27,622 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-11-09 14:53:27,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:27,628 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:27,629 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:27,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:27,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:27,687 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:27,687 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:27,713 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:27,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:27,714 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-11-09 14:53:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:28,384 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 14:53:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:53:28,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 14:53:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:28,387 INFO L225 Difference]: With dead ends: 120 [2020-11-09 14:53:28,387 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 14:53:28,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 14:53:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 14:53:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-11-09 14:53:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 14:53:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-11-09 14:53:28,391 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-11-09 14:53:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:28,391 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-11-09 14:53:28,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-11-09 14:53:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:28,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:28,392 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:28,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:28,592 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-11-09 14:53:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:28,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298285900] [2020-11-09 14:53:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:28,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298285900] [2020-11-09 14:53:28,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78450234] [2020-11-09 14:53:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:28,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:28,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 14:53:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:28,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:28,970 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 14:53:28,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:28,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 14:53:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [231964632] [2020-11-09 14:53:28,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:28,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:28,980 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-11-09 14:53:28,980 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:28,984 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:28,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 14:53:28,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:28,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 14:53:28,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:28,985 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-11-09 14:53:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:30,317 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-11-09 14:53:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 14:53:30,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 14:53:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:30,319 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:53:30,320 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 14:53:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 14:53:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 14:53:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-11-09 14:53:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-09 14:53:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-11-09 14:53:30,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-11-09 14:53:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:30,323 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-11-09 14:53:30,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 14:53:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-11-09 14:53:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:30,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:30,324 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:30,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 14:53:30,525 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-11-09 14:53:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:30,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514588998] [2020-11-09 14:53:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:30,805 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 14:53:30,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514588998] [2020-11-09 14:53:30,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132609236] [2020-11-09 14:53:30,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:30,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 14:53:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 14:53:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:30,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:30,925 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 14:53:30,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:30,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 14:53:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [924470160] [2020-11-09 14:53:30,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:30,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:30,937 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-11-09 14:53:30,937 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:30,978 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:30,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:30,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-11-09 14:53:30,979 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-11-09 14:53:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:32,349 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 14:53:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:53:32,350 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 14:53:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:32,351 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:53:32,351 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 14:53:32,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 14:53:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 14:53:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-11-09 14:53:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-09 14:53:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-11-09 14:53:32,356 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-11-09 14:53:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:32,356 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-11-09 14:53:32,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-11-09 14:53:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 14:53:32,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:32,357 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:32,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 14:53:32,567 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-11-09 14:53:32,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:32,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090949294] [2020-11-09 14:53:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:32,891 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 14:53:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090949294] [2020-11-09 14:53:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550138344] [2020-11-09 14:53:32,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:32,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 14:53:32,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 14:53:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:33,018 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 14:53:33,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:33,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 14:53:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1922769481] [2020-11-09 14:53:33,019 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:33,022 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:33,038 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-11-09 14:53:33,038 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:33,063 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:33,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 14:53:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 14:53:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:33,065 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-11-09 14:53:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:34,526 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 14:53:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 14:53:34,527 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 14:53:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:34,528 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:53:34,528 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 14:53:34,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-11-09 14:53:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 14:53:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 14:53:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 14:53:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 14:53:34,532 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 14:53:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:34,532 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 14:53:34,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 14:53:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 14:53:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 14:53:34,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:34,533 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:34,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 14:53:34,735 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-11-09 14:53:34,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:34,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642921075] [2020-11-09 14:53:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:35,036 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 14:53:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642921075] [2020-11-09 14:53:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821261631] [2020-11-09 14:53:35,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 14:53:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:35,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:35,152 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 14:53:35,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:35,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 14:53:35,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2043352349] [2020-11-09 14:53:35,153 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:35,158 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:35,167 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-11-09 14:53:35,167 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:35,179 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 14:53:35,180 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 14:53:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:36,594 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 14:53:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 14:53:36,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-11-09 14:53:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:36,596 INFO L225 Difference]: With dead ends: 128 [2020-11-09 14:53:36,596 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:36,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 14:53:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 14:53:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 14:53:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 14:53:36,600 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 14:53:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:36,600 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 14:53:36,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 14:53:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:36,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:36,601 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:36,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:36,812 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-11-09 14:53:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:36,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371281010] [2020-11-09 14:53:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:37,261 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 14:53:37,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371281010] [2020-11-09 14:53:37,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635330647] [2020-11-09 14:53:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:37,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:37,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:37,340 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 14:53:37,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:37,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 14:53:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [430921356] [2020-11-09 14:53:37,341 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:37,346 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:37,356 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-11-09 14:53:37,356 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:37,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:37,360 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:37,392 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:37,393 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:37,416 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:37,417 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:37,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:37,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:37,440 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-11-09 14:53:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:38,248 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 14:53:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 14:53:38,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 14:53:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:38,251 INFO L225 Difference]: With dead ends: 128 [2020-11-09 14:53:38,251 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 14:53:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 14:53:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 14:53:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-11-09 14:53:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 14:53:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-11-09 14:53:38,255 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-11-09 14:53:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:38,255 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-11-09 14:53:38,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-11-09 14:53:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:38,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:38,256 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:38,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:38,464 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-11-09 14:53:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:38,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476950247] [2020-11-09 14:53:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:38,759 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 14:53:38,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476950247] [2020-11-09 14:53:38,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854213958] [2020-11-09 14:53:38,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:38,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 14:53:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:38,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 14:53:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:38,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:38,903 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 14:53:38,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:38,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 14:53:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1842781241] [2020-11-09 14:53:38,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:38,910 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:38,919 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-11-09 14:53:38,919 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:38,923 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:38,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 14:53:38,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:38,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 14:53:38,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:38,925 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-11-09 14:53:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:40,404 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-11-09 14:53:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 14:53:40,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 14:53:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:40,406 INFO L225 Difference]: With dead ends: 154 [2020-11-09 14:53:40,406 INFO L226 Difference]: Without dead ends: 149 [2020-11-09 14:53:40,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 14:53:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-09 14:53:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-11-09 14:53:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 14:53:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-11-09 14:53:40,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-11-09 14:53:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:40,410 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-11-09 14:53:40,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 14:53:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-11-09 14:53:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:40,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:40,411 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:40,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-09 14:53:40,620 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-11-09 14:53:40,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:40,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227830566] [2020-11-09 14:53:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:40,953 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 14:53:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227830566] [2020-11-09 14:53:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850034713] [2020-11-09 14:53:40,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:41,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 14:53:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:41,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:41,084 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 14:53:41,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:41,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 14:53:41,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [641175074] [2020-11-09 14:53:41,085 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:41,089 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:41,110 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-11-09 14:53:41,110 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:41,154 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 14:53:41,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:53:41,155 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-11-09 14:53:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:42,763 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 14:53:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 14:53:42,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 14:53:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:42,766 INFO L225 Difference]: With dead ends: 162 [2020-11-09 14:53:42,766 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 14:53:42,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 14:53:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 14:53:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-11-09 14:53:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 14:53:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-11-09 14:53:42,771 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-11-09 14:53:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:42,771 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-11-09 14:53:42,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-11-09 14:53:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 14:53:42,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:42,772 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:42,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:42,983 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-11-09 14:53:42,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:42,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69580535] [2020-11-09 14:53:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:43,337 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 14:53:43,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69580535] [2020-11-09 14:53:43,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961054325] [2020-11-09 14:53:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:43,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-09 14:53:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:43,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:43,461 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 14:53:43,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:43,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 14:53:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [631406828] [2020-11-09 14:53:43,461 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:43,465 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:43,475 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-11-09 14:53:43,475 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:43,504 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:43,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 14:53:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:43,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 14:53:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:43,506 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-11-09 14:53:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:45,212 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 14:53:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 14:53:45,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 14:53:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:45,214 INFO L225 Difference]: With dead ends: 162 [2020-11-09 14:53:45,214 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 14:53:45,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-11-09 14:53:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 14:53:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 14:53:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 14:53:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 14:53:45,218 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 14:53:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:45,218 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 14:53:45,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 14:53:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 14:53:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 14:53:45,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:45,219 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:45,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-09 14:53:45,428 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-11-09 14:53:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:45,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927639615] [2020-11-09 14:53:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:45,763 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 14:53:45,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927639615] [2020-11-09 14:53:45,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460089144] [2020-11-09 14:53:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:45,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 14:53:45,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:45,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:45,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:45,900 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 14:53:45,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:45,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 14:53:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982382185] [2020-11-09 14:53:45,901 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:45,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:45,917 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-11-09 14:53:45,917 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:45,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:45,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:45,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:53:45,951 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 14:53:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:47,608 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 14:53:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 14:53:47,609 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-11-09 14:53:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:47,611 INFO L225 Difference]: With dead ends: 136 [2020-11-09 14:53:47,611 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 14:53:47,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 14:53:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 14:53:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 14:53:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 14:53:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 14:53:47,615 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 14:53:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:47,615 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 14:53:47,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 14:53:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:47,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:47,616 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:47,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 14:53:47,825 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-11-09 14:53:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414942240] [2020-11-09 14:53:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:48,295 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 14:53:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414942240] [2020-11-09 14:53:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314036425] [2020-11-09 14:53:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:48,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:48,375 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 14:53:48,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:48,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 14:53:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409028621] [2020-11-09 14:53:48,376 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:48,382 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:48,392 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-11-09 14:53:48,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:48,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:48,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:48,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:48,437 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:48,462 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:48,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:48,485 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:53:48,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:48,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:48,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:48,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:48,486 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-11-09 14:53:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:49,330 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 14:53:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:49,331 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 14:53:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:49,332 INFO L225 Difference]: With dead ends: 136 [2020-11-09 14:53:49,332 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 14:53:49,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 14:53:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 14:53:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-11-09 14:53:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 14:53:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-11-09 14:53:49,337 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-11-09 14:53:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:49,337 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-11-09 14:53:49,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-11-09 14:53:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:49,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:49,338 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:49,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 14:53:49,546 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-11-09 14:53:49,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:49,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588783346] [2020-11-09 14:53:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:49,873 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 14:53:49,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588783346] [2020-11-09 14:53:49,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583596790] [2020-11-09 14:53:49,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:49,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:49,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 14:53:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:49,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:49,999 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 14:53:49,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:49,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 14:53:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867720761] [2020-11-09 14:53:50,000 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:50,003 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:50,010 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-11-09 14:53:50,011 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:50,016 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:50,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 14:53:50,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 14:53:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:50,017 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-11-09 14:53:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:51,698 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-11-09 14:53:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 14:53:51,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 14:53:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:51,699 INFO L225 Difference]: With dead ends: 164 [2020-11-09 14:53:51,699 INFO L226 Difference]: Without dead ends: 159 [2020-11-09 14:53:51,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 14:53:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-09 14:53:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-11-09 14:53:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 14:53:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-11-09 14:53:51,703 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-11-09 14:53:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:51,703 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-11-09 14:53:51,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 14:53:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-11-09 14:53:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:51,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:51,704 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:51,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 14:53:51,912 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-11-09 14:53:51,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:51,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286801803] [2020-11-09 14:53:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:52,289 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 14:53:52,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286801803] [2020-11-09 14:53:52,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893255589] [2020-11-09 14:53:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:52,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 14:53:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 14:53:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:52,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:52,423 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 14:53:52,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:52,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 14:53:52,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1859507782] [2020-11-09 14:53:52,424 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:52,429 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:52,439 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-11-09 14:53:52,439 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:52,480 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:52,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:53:52,481 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-11-09 14:53:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:54,234 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 14:53:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 14:53:54,234 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 14:53:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:54,235 INFO L225 Difference]: With dead ends: 172 [2020-11-09 14:53:54,235 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:53:54,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-11-09 14:53:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:53:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-11-09 14:53:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-09 14:53:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-11-09 14:53:54,239 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-11-09 14:53:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:54,240 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-11-09 14:53:54,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-11-09 14:53:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 14:53:54,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:54,240 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:54,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:54,449 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-11-09 14:53:54,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:54,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903455219] [2020-11-09 14:53:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:54,843 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 14:53:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903455219] [2020-11-09 14:53:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108134822] [2020-11-09 14:53:54,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:54,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:54,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:54,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:54,962 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 14:53:54,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:54,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 14:53:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843242438] [2020-11-09 14:53:54,963 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:54,968 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:54,976 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-11-09 14:53:54,976 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:55,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 14:53:55,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 14:53:55,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 14:53:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:53:55,010 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-11-09 14:53:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:56,857 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 14:53:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 14:53:56,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 14:53:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:56,859 INFO L225 Difference]: With dead ends: 172 [2020-11-09 14:53:56,859 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:53:56,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 14:53:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:53:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 14:53:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 14:53:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 14:53:56,863 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 14:53:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:56,863 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 14:53:56,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 14:53:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 14:53:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 14:53:56,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:56,864 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:57,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 14:53:57,064 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-11-09 14:53:57,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:57,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608155809] [2020-11-09 14:53:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:57,460 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 14:53:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608155809] [2020-11-09 14:53:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070722171] [2020-11-09 14:53:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:57,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 14:53:57,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:57,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:57,592 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 14:53:57,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:57,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 14:53:57,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1669827352] [2020-11-09 14:53:57,593 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:57,597 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:57,606 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-11-09 14:53:57,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:57,617 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:57,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:57,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:57,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:53:57,619 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 14:53:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:59,468 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 14:53:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 14:53:59,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-11-09 14:53:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:59,470 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:53:59,470 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 14:53:59,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 14:53:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 14:53:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 14:53:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 14:53:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 14:53:59,474 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 14:53:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:59,474 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 14:53:59,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 14:53:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:53:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:59,475 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:59,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:59,677 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-11-09 14:53:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:59,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669760585] [2020-11-09 14:53:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:00,262 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 14:54:00,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669760585] [2020-11-09 14:54:00,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589959899] [2020-11-09 14:54:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:00,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 14:54:00,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:00,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:54:00,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:00,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:00,357 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 14:54:00,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:00,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 14:54:00,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978375018] [2020-11-09 14:54:00,357 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:00,362 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:00,374 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-11-09 14:54:00,374 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:00,377 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:00,377 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:00,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:00,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:00,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:00,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:00,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:54:00,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:54:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:00,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:54:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:54:00,475 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-11-09 14:54:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:01,425 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 14:54:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 14:54:01,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 14:54:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:01,428 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:54:01,428 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 14:54:01,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 14:54:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 14:54:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-11-09 14:54:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 14:54:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-11-09 14:54:01,431 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-11-09 14:54:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:01,431 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-11-09 14:54:01,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:54:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-11-09 14:54:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:54:01,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:01,432 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:01,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-09 14:54:01,634 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-11-09 14:54:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:01,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074424356] [2020-11-09 14:54:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:02,048 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 14:54:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074424356] [2020-11-09 14:54:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669173791] [2020-11-09 14:54:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:02,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 14:54:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:02,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:02,174 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 14:54:02,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:02,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 14:54:02,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1470308326] [2020-11-09 14:54:02,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:02,179 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:02,187 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-11-09 14:54:02,187 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:02,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:02,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 14:54:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 14:54:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:54:02,193 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-11-09 14:54:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:04,106 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-11-09 14:54:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 14:54:04,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 14:54:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:04,109 INFO L225 Difference]: With dead ends: 174 [2020-11-09 14:54:04,109 INFO L226 Difference]: Without dead ends: 169 [2020-11-09 14:54:04,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 14:54:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-09 14:54:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-11-09 14:54:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-09 14:54:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-11-09 14:54:04,112 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-11-09 14:54:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:04,112 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-11-09 14:54:04,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 14:54:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-11-09 14:54:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:54:04,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:04,115 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:04,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:04,316 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-11-09 14:54:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941624598] [2020-11-09 14:54:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:04,753 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 14:54:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941624598] [2020-11-09 14:54:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136698902] [2020-11-09 14:54:04,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:04,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:04,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:54:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:04,914 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 14:54:04,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:04,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 14:54:04,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146643629] [2020-11-09 14:54:04,915 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:04,920 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:04,934 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-11-09 14:54:04,934 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:05,006 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:05,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:54:05,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:54:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-11-09 14:54:05,008 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-11-09 14:54:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:06,948 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 14:54:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 14:54:06,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 14:54:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:06,950 INFO L225 Difference]: With dead ends: 182 [2020-11-09 14:54:06,950 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 14:54:06,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 14:54:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 14:54:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-11-09 14:54:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 14:54:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-11-09 14:54:06,954 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-11-09 14:54:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:06,954 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-11-09 14:54:06,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:54:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-11-09 14:54:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 14:54:06,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:06,955 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:07,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-09 14:54:07,157 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-11-09 14:54:07,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:07,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572488307] [2020-11-09 14:54:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:07,609 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 14:54:07,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572488307] [2020-11-09 14:54:07,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959553798] [2020-11-09 14:54:07,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:07,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-09 14:54:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:07,754 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 14:54:07,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:07,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 14:54:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2086438980] [2020-11-09 14:54:07,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:07,759 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:07,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-11-09 14:54:07,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:07,801 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 14:54:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 14:54:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:07,803 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-11-09 14:54:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:09,955 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 14:54:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 14:54:09,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 14:54:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:09,958 INFO L225 Difference]: With dead ends: 182 [2020-11-09 14:54:09,958 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 14:54:09,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-11-09 14:54:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 14:54:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 14:54:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 14:54:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 14:54:09,962 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 14:54:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:09,962 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 14:54:09,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 14:54:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 14:54:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 14:54:09,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:09,963 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:10,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:10,173 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-11-09 14:54:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:10,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19122845] [2020-11-09 14:54:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:10,640 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 14:54:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19122845] [2020-11-09 14:54:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824378756] [2020-11-09 14:54:10,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:10,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:10,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:10,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:54:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:10,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:10,771 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 14:54:10,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:10,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 14:54:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1348897915] [2020-11-09 14:54:10,772 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:10,776 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:10,788 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-11-09 14:54:10,788 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:10,799 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:10,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:54:10,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:54:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 14:54:10,800 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 14:54:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:12,928 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 14:54:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 14:54:12,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-11-09 14:54:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:12,930 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:54:12,930 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 14:54:12,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 14:54:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 14:54:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 14:54:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 14:54:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 14:54:12,934 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 14:54:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:12,934 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 14:54:12,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:54:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 14:54:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:12,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:12,940 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:13,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-09 14:54:13,141 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-11-09 14:54:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:13,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471843676] [2020-11-09 14:54:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:13,792 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 14:54:13,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471843676] [2020-11-09 14:54:13,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230352832] [2020-11-09 14:54:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:13,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 14:54:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 14:54:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:13,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:13,875 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 14:54:13,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 14:54:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1293908767] [2020-11-09 14:54:13,876 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:13,880 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:13,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-11-09 14:54:13,891 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:13,895 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:13,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:13,934 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:13,935 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:13,965 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:13,966 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:13,996 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:54:13,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:13,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:13,997 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-11-09 14:54:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:15,144 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 14:54:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:54:15,145 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 14:54:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:15,146 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:54:15,146 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 14:54:15,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 14:54:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 14:54:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-11-09 14:54:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 14:54:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-11-09 14:54:15,150 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-11-09 14:54:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:15,151 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-11-09 14:54:15,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-11-09 14:54:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:15,151 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:15,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:15,362 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-11-09 14:54:15,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:15,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495029966] [2020-11-09 14:54:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:15,879 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 14:54:15,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495029966] [2020-11-09 14:54:15,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277634165] [2020-11-09 14:54:15,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:15,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 14:54:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:16,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:16,052 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 14:54:16,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:16,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 14:54:16,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895766231] [2020-11-09 14:54:16,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:16,059 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:16,076 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-11-09 14:54:16,076 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:16,083 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:16,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 14:54:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 14:54:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:16,084 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-11-09 14:54:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:18,298 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-11-09 14:54:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 14:54:18,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 14:54:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:18,301 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:54:18,301 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 14:54:18,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 14:54:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 14:54:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-11-09 14:54:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 14:54:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-11-09 14:54:18,305 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-11-09 14:54:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:18,305 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-11-09 14:54:18,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 14:54:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-11-09 14:54:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:18,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:18,306 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:18,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-09 14:54:18,507 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-11-09 14:54:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:18,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837166994] [2020-11-09 14:54:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:18,993 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 14:54:18,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837166994] [2020-11-09 14:54:18,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586939636] [2020-11-09 14:54:18,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:19,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:19,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:19,146 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 14:54:19,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:19,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 14:54:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1843120906] [2020-11-09 14:54:19,147 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:19,153 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:19,168 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-11-09 14:54:19,168 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:19,206 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:54:19,207 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-11-09 14:54:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:21,479 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 14:54:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 14:54:21,479 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 14:54:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:21,481 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:54:21,481 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 14:54:21,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-11-09 14:54:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 14:54:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-11-09 14:54:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-09 14:54:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-11-09 14:54:21,485 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-11-09 14:54:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:21,485 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-11-09 14:54:21,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-11-09 14:54:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 14:54:21,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:21,486 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:21,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 14:54:21,686 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-11-09 14:54:21,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:21,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442498584] [2020-11-09 14:54:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:22,221 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 14:54:22,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442498584] [2020-11-09 14:54:22,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6204051] [2020-11-09 14:54:22,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:22,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 14:54:22,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:22,364 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 14:54:22,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:22,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 14:54:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [768207201] [2020-11-09 14:54:22,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:22,370 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:22,399 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-11-09 14:54:22,399 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:22,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:22,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 14:54:22,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 14:54:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:22,439 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-11-09 14:54:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:24,882 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 14:54:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 14:54:24,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 14:54:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:24,885 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:54:24,885 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 14:54:24,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-11-09 14:54:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 14:54:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 14:54:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 14:54:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 14:54:24,890 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 14:54:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:24,890 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 14:54:24,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 14:54:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 14:54:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 14:54:24,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:24,890 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:25,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 14:54:25,091 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:25,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-11-09 14:54:25,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:25,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748864898] [2020-11-09 14:54:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:25,635 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 14:54:25,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748864898] [2020-11-09 14:54:25,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096040234] [2020-11-09 14:54:25,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:25,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 14:54:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 14:54:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:25,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:25,793 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 14:54:25,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:25,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 14:54:25,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [725317734] [2020-11-09 14:54:25,794 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:25,798 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:25,809 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-11-09 14:54:25,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:25,822 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:25,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:54:25,823 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 14:54:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:28,354 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 14:54:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 14:54:28,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-11-09 14:54:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:28,355 INFO L225 Difference]: With dead ends: 160 [2020-11-09 14:54:28,355 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 14:54:28,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 14:54:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 14:54:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 14:54:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 14:54:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 14:54:28,358 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 14:54:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:28,359 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 14:54:28,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 14:54:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:28,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:28,360 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:28,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:28,568 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-11-09 14:54:28,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:28,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045151816] [2020-11-09 14:54:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045151816] [2020-11-09 14:54:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672900061] [2020-11-09 14:54:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:29,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:29,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:29,429 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 14:54:29,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:29,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 14:54:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1229754567] [2020-11-09 14:54:29,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:29,435 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:29,446 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-11-09 14:54:29,446 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:29,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:29,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:29,489 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:29,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:29,535 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:29,536 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:29,580 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:54:29,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:29,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:29,581 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-11-09 14:54:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:30,943 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 14:54:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 14:54:30,944 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 14:54:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:30,945 INFO L225 Difference]: With dead ends: 160 [2020-11-09 14:54:30,945 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 14:54:30,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 14:54:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 14:54:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-11-09 14:54:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 14:54:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-11-09 14:54:30,949 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-11-09 14:54:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:30,949 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-11-09 14:54:30,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-11-09 14:54:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:30,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:30,950 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:31,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:31,160 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-11-09 14:54:31,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:31,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730351445] [2020-11-09 14:54:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:31,734 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 14:54:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730351445] [2020-11-09 14:54:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148471110] [2020-11-09 14:54:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:31,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 14:54:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 14:54:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:31,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:31,878 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 14:54:31,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:31,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 14:54:31,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [404405658] [2020-11-09 14:54:31,879 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:31,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:31,900 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-11-09 14:54:31,900 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:31,915 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:31,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 14:54:31,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 14:54:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:31,916 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-11-09 14:54:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:34,590 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-11-09 14:54:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 14:54:34,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 14:54:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:34,592 INFO L225 Difference]: With dead ends: 194 [2020-11-09 14:54:34,592 INFO L226 Difference]: Without dead ends: 189 [2020-11-09 14:54:34,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 14:54:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-09 14:54:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-11-09 14:54:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 14:54:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-11-09 14:54:34,595 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-11-09 14:54:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:34,596 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-11-09 14:54:34,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 14:54:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-11-09 14:54:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:34,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:34,596 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:34,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:34,806 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-11-09 14:54:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:34,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433102508] [2020-11-09 14:54:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:35,405 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 14:54:35,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433102508] [2020-11-09 14:54:35,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900685108] [2020-11-09 14:54:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:35,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 14:54:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:35,572 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 14:54:35,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:35,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 14:54:35,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1724854878] [2020-11-09 14:54:35,573 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:35,578 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:35,591 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-11-09 14:54:35,592 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:35,651 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 14:54:35,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:35,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:54:35,652 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-11-09 14:54:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:38,401 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 14:54:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 14:54:38,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 14:54:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:38,403 INFO L225 Difference]: With dead ends: 202 [2020-11-09 14:54:38,403 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 14:54:38,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-11-09 14:54:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 14:54:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-11-09 14:54:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-09 14:54:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-11-09 14:54:38,407 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-11-09 14:54:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:38,407 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-11-09 14:54:38,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-11-09 14:54:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 14:54:38,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:38,408 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:38,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-09 14:54:38,618 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-11-09 14:54:38,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:38,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236215390] [2020-11-09 14:54:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:39,250 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 14:54:39,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236215390] [2020-11-09 14:54:39,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781618252] [2020-11-09 14:54:39,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:39,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:39,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:39,393 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 14:54:39,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:39,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 14:54:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304875755] [2020-11-09 14:54:39,394 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:39,409 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:39,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-11-09 14:54:39,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:39,459 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:39,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 14:54:39,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 14:54:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:39,460 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-11-09 14:54:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:42,318 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 14:54:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 14:54:42,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 14:54:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:42,320 INFO L225 Difference]: With dead ends: 202 [2020-11-09 14:54:42,321 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 14:54:42,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 14:54:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 14:54:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 14:54:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 14:54:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 14:54:42,324 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 14:54:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:42,325 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 14:54:42,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 14:54:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 14:54:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 14:54:42,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:42,326 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:42,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:42,536 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-11-09 14:54:42,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:42,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090212245] [2020-11-09 14:54:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:43,192 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 14:54:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090212245] [2020-11-09 14:54:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864076076] [2020-11-09 14:54:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:43,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:43,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:43,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:43,339 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 14:54:43,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:43,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 14:54:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730153600] [2020-11-09 14:54:43,340 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:43,345 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:43,364 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-11-09 14:54:43,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:43,381 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:43,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:43,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:54:43,383 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 14:54:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:46,271 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 14:54:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 14:54:46,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-11-09 14:54:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:46,273 INFO L225 Difference]: With dead ends: 168 [2020-11-09 14:54:46,273 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:54:46,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 14:54:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:54:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 14:54:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 14:54:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 14:54:46,277 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 14:54:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:46,277 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 14:54:46,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 14:54:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:46,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:46,279 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:46,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:46,488 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-11-09 14:54:46,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:46,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105767989] [2020-11-09 14:54:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:47,337 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 14:54:47,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105767989] [2020-11-09 14:54:47,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729496349] [2020-11-09 14:54:47,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:47,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 14:54:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:54:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:47,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:47,434 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 14:54:47,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:47,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 14:54:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [481209057] [2020-11-09 14:54:47,435 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:47,441 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:47,459 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-11-09 14:54:47,459 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:47,460 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:47,460 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:47,516 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:47,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:47,553 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:47,553 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:47,584 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:54:47,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:54:47,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:47,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:54:47,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:47,586 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-11-09 14:54:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:49,056 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 14:54:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:54:49,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 14:54:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:49,058 INFO L225 Difference]: With dead ends: 168 [2020-11-09 14:54:49,058 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 14:54:49,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 14:54:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 14:54:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-11-09 14:54:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 14:54:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-11-09 14:54:49,062 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-11-09 14:54:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:49,062 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-11-09 14:54:49,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:54:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-11-09 14:54:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:49,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:49,063 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:49,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:49,264 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-11-09 14:54:49,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:49,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797119012] [2020-11-09 14:54:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:49,902 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 14:54:49,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797119012] [2020-11-09 14:54:49,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540194995] [2020-11-09 14:54:49,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:49,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:49,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 14:54:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:50,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:50,044 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 14:54:50,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:50,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 14:54:50,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1891256472] [2020-11-09 14:54:50,044 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:50,051 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:50,068 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-11-09 14:54:50,068 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:50,080 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:50,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 14:54:50,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 14:54:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:50,081 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-11-09 14:54:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:52,990 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-11-09 14:54:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 14:54:52,990 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 14:54:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:52,992 INFO L225 Difference]: With dead ends: 204 [2020-11-09 14:54:52,992 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 14:54:52,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 14:54:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 14:54:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-11-09 14:54:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-09 14:54:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-11-09 14:54:52,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-11-09 14:54:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:52,996 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-11-09 14:54:52,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 14:54:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-11-09 14:54:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:52,997 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:53,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-09 14:54:53,205 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-11-09 14:54:53,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:53,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111646430] [2020-11-09 14:54:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:53,840 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 14:54:53,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111646430] [2020-11-09 14:54:53,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562230093] [2020-11-09 14:54:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:53,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 14:54:53,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 14:54:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:53,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:53,992 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 14:54:53,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:53,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 14:54:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452385802] [2020-11-09 14:54:53,993 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:53,997 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:54,009 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-11-09 14:54:54,009 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:54,050 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:54,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:54:54,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:54:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 14:54:54,051 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-11-09 14:54:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:56,924 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 14:54:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 14:54:56,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 14:54:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:56,926 INFO L225 Difference]: With dead ends: 212 [2020-11-09 14:54:56,926 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 14:54:56,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-11-09 14:54:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 14:54:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-09 14:54:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 14:54:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-11-09 14:54:56,930 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-11-09 14:54:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:56,930 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-11-09 14:54:56,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:54:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-11-09 14:54:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 14:54:56,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:56,931 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:57,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:57,140 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-11-09 14:54:57,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:57,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980317677] [2020-11-09 14:54:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:57,867 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 14:54:57,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980317677] [2020-11-09 14:54:57,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94795091] [2020-11-09 14:54:57,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:57,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-09 14:54:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:54:57,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:57,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:58,021 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 14:54:58,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 14:54:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [140347313] [2020-11-09 14:54:58,021 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:58,025 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:58,039 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-11-09 14:54:58,039 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:58,078 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 14:54:58,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 14:54:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:58,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 14:54:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:54:58,080 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-11-09 14:55:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:01,155 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 14:55:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 14:55:01,156 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 14:55:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:01,158 INFO L225 Difference]: With dead ends: 212 [2020-11-09 14:55:01,158 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 14:55:01,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-11-09 14:55:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 14:55:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 14:55:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 14:55:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 14:55:01,162 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 14:55:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:01,162 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 14:55:01,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 14:55:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 14:55:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 14:55:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:01,162 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:01,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-09 14:55:01,364 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-11-09 14:55:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:01,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838092421] [2020-11-09 14:55:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:02,091 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 14:55:02,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838092421] [2020-11-09 14:55:02,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445784557] [2020-11-09 14:55:02,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:55:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:02,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:02,247 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 14:55:02,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:02,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 14:55:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1577341318] [2020-11-09 14:55:02,247 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:02,251 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:02,266 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-11-09 14:55:02,266 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:02,276 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:02,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:55:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:55:02,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 14:55:02,278 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 14:55:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:05,452 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 14:55:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 14:55:05,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-11-09 14:55:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:05,454 INFO L225 Difference]: With dead ends: 176 [2020-11-09 14:55:05,455 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 14:55:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 14:55:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 14:55:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 14:55:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 14:55:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 14:55:05,459 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 14:55:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:05,459 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 14:55:05,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:55:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 14:55:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:55:05,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:05,460 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:05,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:05,670 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-11-09 14:55:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:05,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421605322] [2020-11-09 14:55:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:06,664 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 14:55:06,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421605322] [2020-11-09 14:55:06,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746915504] [2020-11-09 14:55:06,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:06,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:55:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:55:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:06,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:06,758 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 14:55:06,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:06,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 14:55:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [882989461] [2020-11-09 14:55:06,759 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:06,765 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:06,785 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-11-09 14:55:06,785 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:06,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:06,786 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:06,839 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:06,840 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:06,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:06,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:06,920 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:55:06,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:06,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:55:06,922 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-11-09 14:55:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:08,608 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-09 14:55:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 14:55:08,609 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 14:55:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:08,611 INFO L225 Difference]: With dead ends: 176 [2020-11-09 14:55:08,611 INFO L226 Difference]: Without dead ends: 170 [2020-11-09 14:55:08,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 14:55:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-09 14:55:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-11-09 14:55:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 14:55:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-11-09 14:55:08,615 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-11-09 14:55:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:08,615 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-11-09 14:55:08,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-11-09 14:55:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:55:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:08,616 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:08,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:08,828 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-11-09 14:55:08,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:08,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891069561] [2020-11-09 14:55:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:09,598 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 14:55:09,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891069561] [2020-11-09 14:55:09,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740575287] [2020-11-09 14:55:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:09,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 14:55:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 14:55:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:09,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:09,777 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 14:55:09,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:09,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 14:55:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881030949] [2020-11-09 14:55:09,778 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:09,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:09,796 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-11-09 14:55:09,796 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:09,801 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:09,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 14:55:09,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 14:55:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:55:09,802 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-11-09 14:55:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:13,124 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-11-09 14:55:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 14:55:13,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-09 14:55:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:13,127 INFO L225 Difference]: With dead ends: 214 [2020-11-09 14:55:13,127 INFO L226 Difference]: Without dead ends: 209 [2020-11-09 14:55:13,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 14:55:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-09 14:55:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-11-09 14:55:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 14:55:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-11-09 14:55:13,132 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-11-09 14:55:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:13,132 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-11-09 14:55:13,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 14:55:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-11-09 14:55:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:55:13,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:13,133 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:13,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:13,339 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-11-09 14:55:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:13,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794670631] [2020-11-09 14:55:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:14,111 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 14:55:14,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794670631] [2020-11-09 14:55:14,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498498285] [2020-11-09 14:55:14,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:14,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:55:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 14:55:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:14,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:14,274 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 14:55:14,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:14,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 14:55:14,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033331732] [2020-11-09 14:55:14,274 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:14,278 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:14,293 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-11-09 14:55:14,293 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:14,337 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:14,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:55:14,338 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-11-09 14:55:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:17,763 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 14:55:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 14:55:17,763 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 14:55:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:17,765 INFO L225 Difference]: With dead ends: 222 [2020-11-09 14:55:17,765 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 14:55:17,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-11-09 14:55:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 14:55:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-11-09 14:55:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-09 14:55:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-11-09 14:55:17,769 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-11-09 14:55:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:17,770 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-11-09 14:55:17,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-11-09 14:55:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 14:55:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:17,770 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:17,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:17,973 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-11-09 14:55:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657590337] [2020-11-09 14:55:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:18,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657590337] [2020-11-09 14:55:18,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362293515] [2020-11-09 14:55:18,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:18,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-09 14:55:18,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:55:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:18,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:18,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:18,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 14:55:18,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1845010229] [2020-11-09 14:55:18,975 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:18,982 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:19,004 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-11-09 14:55:19,004 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:19,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:19,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 14:55:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 14:55:19,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:19,057 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-11-09 14:55:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:22,666 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 14:55:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 14:55:22,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 14:55:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:22,668 INFO L225 Difference]: With dead ends: 222 [2020-11-09 14:55:22,668 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 14:55:22,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-11-09 14:55:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 14:55:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-11-09 14:55:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 14:55:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 14:55:22,672 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-11-09 14:55:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:22,673 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 14:55:22,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 14:55:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 14:55:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 14:55:22,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:22,673 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:22,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:22,876 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-11-09 14:55:22,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:22,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549340080] [2020-11-09 14:55:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549340080] [2020-11-09 14:55:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611313403] [2020-11-09 14:55:23,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:23,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-09 14:55:23,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:55:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:23,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:23,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:23,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 14:55:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1815835495] [2020-11-09 14:55:23,878 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:23,892 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:23,913 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-11-09 14:55:23,913 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:23,934 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:23,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:23,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:55:23,936 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-11-09 14:55:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:27,518 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-11-09 14:55:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 14:55:27,518 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-11-09 14:55:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:27,519 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:55:27,519 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 14:55:27,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-11-09 14:55:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 14:55:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-11-09 14:55:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 14:55:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-09 14:55:27,524 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-09 14:55:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:27,525 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-09 14:55:27,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-09 14:55:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:27,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:27,525 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:27,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:27,726 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-11-09 14:55:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:27,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763587388] [2020-11-09 14:55:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763587388] [2020-11-09 14:55:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341000703] [2020-11-09 14:55:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:28,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:28,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:28,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-09 14:55:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1903930722] [2020-11-09 14:55:28,958 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:28,962 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:28,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-11-09 14:55:28,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:28,979 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:28,979 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:29,026 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:29,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:29,070 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:29,071 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:29,122 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:55:29,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:29,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:29,124 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-11-09 14:55:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:31,002 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-09 14:55:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:55:31,003 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 14:55:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:31,004 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:55:31,004 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 14:55:31,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 14:55:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 14:55:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-11-09 14:55:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-09 14:55:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-11-09 14:55:31,008 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-11-09 14:55:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:31,008 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-11-09 14:55:31,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-11-09 14:55:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:31,009 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:31,009 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:31,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:31,219 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-11-09 14:55:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:31,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105564382] [2020-11-09 14:55:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:32,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105564382] [2020-11-09 14:55:32,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455425168] [2020-11-09 14:55:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:32,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:55:32,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 14:55:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:32,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:32,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:32,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 14:55:32,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2039187882] [2020-11-09 14:55:32,255 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:32,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:32,276 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-11-09 14:55:32,276 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:32,284 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:32,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 14:55:32,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 14:55:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:32,285 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-11-09 14:55:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:36,006 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-11-09 14:55:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 14:55:36,007 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-09 14:55:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:36,008 INFO L225 Difference]: With dead ends: 224 [2020-11-09 14:55:36,008 INFO L226 Difference]: Without dead ends: 219 [2020-11-09 14:55:36,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 14:55:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-09 14:55:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-11-09 14:55:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 14:55:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-11-09 14:55:36,013 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-11-09 14:55:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:36,013 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-11-09 14:55:36,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 14:55:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-11-09 14:55:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:36,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:36,014 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:36,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-09 14:55:36,217 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-11-09 14:55:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:36,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456894617] [2020-11-09 14:55:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:37,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456894617] [2020-11-09 14:55:37,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041491870] [2020-11-09 14:55:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:37,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-09 14:55:37,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:37,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:37,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 14:55:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131256157] [2020-11-09 14:55:37,289 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:37,295 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:37,317 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-11-09 14:55:37,318 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:37,371 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 14:55:37,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:55:37,373 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-11-09 14:55:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:41,259 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 14:55:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 14:55:41,260 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 14:55:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:41,261 INFO L225 Difference]: With dead ends: 232 [2020-11-09 14:55:41,261 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 14:55:41,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-11-09 14:55:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 14:55:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-11-09 14:55:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-09 14:55:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-11-09 14:55:41,266 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-11-09 14:55:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:41,267 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-11-09 14:55:41,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-11-09 14:55:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 14:55:41,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:41,268 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:41,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:41,478 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-11-09 14:55:41,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:41,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577737341] [2020-11-09 14:55:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:42,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577737341] [2020-11-09 14:55:42,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605774405] [2020-11-09 14:55:42,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:42,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:55:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:42,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:42,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:42,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 14:55:42,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224251770] [2020-11-09 14:55:42,582 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:42,589 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:42,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-11-09 14:55:42,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:42,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:42,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 14:55:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 14:55:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:42,672 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-11-09 14:55:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:46,705 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 14:55:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 14:55:46,706 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 14:55:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:46,707 INFO L225 Difference]: With dead ends: 232 [2020-11-09 14:55:46,707 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 14:55:46,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-11-09 14:55:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 14:55:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-11-09 14:55:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 14:55:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 14:55:46,714 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-11-09 14:55:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:46,714 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 14:55:46,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 14:55:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 14:55:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 14:55:46,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:46,715 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:46,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-09 14:55:46,922 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-11-09 14:55:46,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:46,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786171864] [2020-11-09 14:55:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786171864] [2020-11-09 14:55:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891268162] [2020-11-09 14:55:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:47,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-09 14:55:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:48,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 14:55:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [617685621] [2020-11-09 14:55:48,070 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:48,076 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:48,093 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-11-09 14:55:48,094 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:48,105 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:48,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:48,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:48,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:55:48,106 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-11-09 14:55:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:52,111 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-11-09 14:55:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 14:55:52,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-11-09 14:55:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:52,113 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:55:52,113 INFO L226 Difference]: Without dead ends: 187 [2020-11-09 14:55:52,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-11-09 14:55:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-09 14:55:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-11-09 14:55:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-09 14:55:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-09 14:55:52,117 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-09 14:55:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:52,117 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-09 14:55:52,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-09 14:55:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:55:52,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:52,118 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:52,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:52,318 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-11-09 14:55:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:52,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055845206] [2020-11-09 14:55:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:53,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055845206] [2020-11-09 14:55:53,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329983169] [2020-11-09 14:55:53,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:53,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-09 14:55:53,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 14:55:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:53,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:53,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:53,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-09 14:55:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1920828174] [2020-11-09 14:55:53,690 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:53,695 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:53,720 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-11-09 14:55:53,720 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:53,721 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:53,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:53,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:53,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:53,857 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:53,857 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:53,901 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 14:55:53,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:55:53,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:55:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:53,903 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-11-09 14:55:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:55,942 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-09 14:55:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 14:55:55,943 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 14:55:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:55,944 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:55:55,945 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 14:55:55,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 14:55:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 14:55:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-11-09 14:55:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-09 14:55:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-11-09 14:55:55,948 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-11-09 14:55:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:55,948 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-11-09 14:55:55,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:55:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-11-09 14:55:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:55:55,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:55,949 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:56,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:56,151 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-11-09 14:55:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:56,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271659389] [2020-11-09 14:55:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:57,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271659389] [2020-11-09 14:55:57,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997547361] [2020-11-09 14:55:57,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 14:55:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:57,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:57,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:57,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 14:55:57,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1036995370] [2020-11-09 14:55:57,306 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:57,310 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:57,328 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-11-09 14:55:57,328 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:57,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 14:55:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 14:55:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:57,335 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. [2020-11-09 14:56:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:01,534 INFO L93 Difference]: Finished difference Result 234 states and 559 transitions. [2020-11-09 14:56:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 14:56:01,535 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-09 14:56:01,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:01,536 INFO L225 Difference]: With dead ends: 234 [2020-11-09 14:56:01,537 INFO L226 Difference]: Without dead ends: 229 [2020-11-09 14:56:01,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4436, Invalid=9844, Unknown=0, NotChecked=0, Total=14280 [2020-11-09 14:56:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-09 14:56:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 110. [2020-11-09 14:56:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-09 14:56:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2020-11-09 14:56:01,540 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 46 [2020-11-09 14:56:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:01,540 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2020-11-09 14:56:01,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 14:56:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2020-11-09 14:56:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:56:01,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:01,541 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:01,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:01,742 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 92 times [2020-11-09 14:56:01,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:01,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84072596] [2020-11-09 14:56:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:02,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84072596] [2020-11-09 14:56:02,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986607972] [2020-11-09 14:56:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:02,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:56:02,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 14:56:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:02,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:56:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:02,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:02,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 14:56:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [137220175] [2020-11-09 14:56:02,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:02,934 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:02,951 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 60 transitions. [2020-11-09 14:56:02,952 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:03,005 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45015#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 43))] [2020-11-09 14:56:03,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:56:03,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:56:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 14:56:03,006 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand 43 states. [2020-11-09 14:56:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:07,430 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 14:56:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 14:56:07,431 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 14:56:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:07,433 INFO L225 Difference]: With dead ends: 242 [2020-11-09 14:56:07,433 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 14:56:07,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4285, Invalid=9757, Unknown=0, NotChecked=0, Total=14042 [2020-11-09 14:56:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 14:56:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-11-09 14:56:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-09 14:56:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2020-11-09 14:56:07,437 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 46 [2020-11-09 14:56:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:07,437 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2020-11-09 14:56:07,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:56:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2020-11-09 14:56:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 14:56:07,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:07,438 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:07,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:07,649 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 93 times [2020-11-09 14:56:07,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:07,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227610029] [2020-11-09 14:56:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:08,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227610029] [2020-11-09 14:56:08,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758127792] [2020-11-09 14:56:08,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:08,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-09 14:56:08,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 14:56:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:08,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:08,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 14:56:08,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [53079497] [2020-11-09 14:56:08,921 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:08,926 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:08,975 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 57 transitions. [2020-11-09 14:56:08,975 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:09,023 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45890#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 14:56:09,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 14:56:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 14:56:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 14:56:09,025 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand 44 states. [2020-11-09 14:56:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:13,562 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 14:56:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-09 14:56:13,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-09 14:56:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:13,564 INFO L225 Difference]: With dead ends: 242 [2020-11-09 14:56:13,564 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 14:56:13,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4504 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4702, Invalid=10550, Unknown=0, NotChecked=0, Total=15252 [2020-11-09 14:56:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 14:56:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-11-09 14:56:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 14:56:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-11-09 14:56:13,569 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-11-09 14:56:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:13,569 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-11-09 14:56:13,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 14:56:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-11-09 14:56:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 14:56:13,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:13,570 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:13,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-11-09 14:56:13,781 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 94 times [2020-11-09 14:56:13,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:13,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577029020] [2020-11-09 14:56:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577029020] [2020-11-09 14:56:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984952493] [2020-11-09 14:56:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:14,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:56:14,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 14:56:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:14,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:56:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:15,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:15,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 14:56:15,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1608977956] [2020-11-09 14:56:15,044 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:15,049 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:15,068 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 59 transitions. [2020-11-09 14:56:15,069 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:15,080 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:56:15,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:56:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:56:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 14:56:15,082 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-11-09 14:56:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:19,661 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-11-09 14:56:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 14:56:19,662 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-11-09 14:56:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:19,663 INFO L225 Difference]: With dead ends: 200 [2020-11-09 14:56:19,663 INFO L226 Difference]: Without dead ends: 195 [2020-11-09 14:56:19,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4464, Invalid=10056, Unknown=0, NotChecked=0, Total=14520 [2020-11-09 14:56:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-09 14:56:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-11-09 14:56:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-09 14:56:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-11-09 14:56:19,668 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-11-09 14:56:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:19,668 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-11-09 14:56:19,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:56:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-11-09 14:56:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 14:56:19,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:19,668 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:19,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:19,869 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 95 times [2020-11-09 14:56:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:19,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003233625] [2020-11-09 14:56:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 14:56:19,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 14:56:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 14:56:19,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 14:56:19,987 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-09 14:56:19,987 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-09 14:56:19,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-11-09 14:56:20,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 02:56:20 BasicIcfg [2020-11-09 14:56:20,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 14:56:20,180 INFO L168 Benchmark]: Toolchain (without parser) took 225664.71 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 127.7 MB in the beginning and 126.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 169.7 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,181 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory was 126.1 MB in the beginning and 126.1 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 14:56:20,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 834.51 ms. Allocated memory is still 153.1 MB. Free memory was 127.1 MB in the beginning and 130.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,182 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.40 ms. Allocated memory is still 153.1 MB. Free memory was 130.5 MB in the beginning and 128.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,182 INFO L168 Benchmark]: Boogie Preprocessor took 67.44 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 127.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,183 INFO L168 Benchmark]: RCFGBuilder took 564.91 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 107.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,183 INFO L168 Benchmark]: TraceAbstraction took 224097.02 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 107.0 MB in the beginning and 126.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 148.2 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:20,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory was 126.1 MB in the beginning and 126.1 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 834.51 ms. Allocated memory is still 153.1 MB. Free memory was 127.1 MB in the beginning and 130.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.40 ms. Allocated memory is still 153.1 MB. Free memory was 130.5 MB in the beginning and 128.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.44 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 127.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 564.91 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 107.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 224097.02 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 107.0 MB in the beginning and 126.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 148.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.4s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L711] 0 int condJ = j >= (2*20 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longest-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 223.7s, OverallIterations: 97, TraceHistogramMax: 20, AutomataDifference: 143.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 1361 SDtfs, 8658 SDslu, 11140 SDs, 0 SdLazy, 12806 SolverSat, 10091 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8788 GetRequests, 2884 SyntacticMatches, 113 SemanticMatches, 5791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125388 ImplicationChecksByTransitivity, 157.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 96 MinimizatonAttempts, 4319 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 41.9s InterpolantComputationTime, 5418 NumberOfCodeBlocks, 5418 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 5182 ConstructedInterpolants, 0 QuantifiedInterpolants, 661968 SizeOfPredicates, 1950 NumberOfNonLiveVariables, 16836 ConjunctsInSsa, 2330 ConjunctsInUnsatCore, 188 InterpolantComputations, 4 PerfectInterpolantSequences, 0/23560 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...