/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:30:39,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:30:39,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:30:39,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:30:39,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:30:39,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:30:39,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:30:39,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:30:39,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:30:39,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:30:39,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:30:39,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:30:39,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:30:39,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:30:39,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:30:39,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:30:39,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:30:39,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:30:39,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:30:39,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:30:39,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:30:39,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:30:39,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:30:39,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:30:39,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 12:30:39,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 12:30:39,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 12:30:39,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 12:30:39,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 12:30:39,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 12:30:39,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:30:39,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:30:39,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:30:39,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:30:39,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:30:39,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:30:39,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:30:39,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:30:39,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:30:39,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:30:39,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:30:39,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-16 12:30:39,599 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:30:39,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:30:39,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:30:39,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:30:39,601 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:30:39,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:30:39,601 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:30:39,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:30:39,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:30:39,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:30:39,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:30:39,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:30:39,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:30:39,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:30:39,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:30:39,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:30:39,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:30:39,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:30:39,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:30:39,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:30:39,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:30:39,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:30:39,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:30:39,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:30:39,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:30:39,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:30:39,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:30:39,605 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 12:30:39,606 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:30:39,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:30:39,606 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 12:30:39,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:30:39,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:30:39,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:30:39,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:30:39,908 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:30:39,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 12:30:39,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa10d5f5/1248196b90d54083ae064937451b079e/FLAG2cf256baf [2020-10-16 12:30:40,514 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:30:40,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 12:30:40,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa10d5f5/1248196b90d54083ae064937451b079e/FLAG2cf256baf [2020-10-16 12:30:40,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa10d5f5/1248196b90d54083ae064937451b079e [2020-10-16 12:30:40,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:30:40,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:30:40,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:40,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:30:40,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:30:40,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:40" (1/1) ... [2020-10-16 12:30:40,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b321d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:40, skipping insertion in model container [2020-10-16 12:30:40,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:40" (1/1) ... [2020-10-16 12:30:40,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:30:40,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:30:41,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:41,382 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:30:41,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:41,547 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:30:41,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41 WrapperNode [2020-10-16 12:30:41,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:41,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:41,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:30:41,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:30:41,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:41,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:30:41,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:30:41,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:30:41,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... [2020-10-16 12:30:41,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:30:41,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:30:41,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:30:41,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:30:41,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:30:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 12:30:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 12:30:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 12:30:41,723 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 12:30:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:30:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 12:30:41,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:30:41,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:30:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 12:30:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:30:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:30:41,729 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:30:42,049 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:30:42,049 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 12:30:42,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:42 BoogieIcfgContainer [2020-10-16 12:30:42,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:30:42,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:30:42,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:30:42,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:30:42,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:30:40" (1/3) ... [2020-10-16 12:30:42,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d194f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:42, skipping insertion in model container [2020-10-16 12:30:42,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:41" (2/3) ... [2020-10-16 12:30:42,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d194f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:42, skipping insertion in model container [2020-10-16 12:30:42,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:42" (3/3) ... [2020-10-16 12:30:42,062 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-16 12:30:42,076 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:30:42,077 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:30:42,085 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:30:42,086 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:30:42,116 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,116 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,116 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,117 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,117 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,118 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,118 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,118 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,119 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,120 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,120 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,127 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,128 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,128 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,130 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,130 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,130 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,131 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,131 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,132 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,134 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,134 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,135 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,140 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,141 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,141 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,141 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,142 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,161 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,161 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,161 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,162 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:42,166 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:30:42,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 12:30:42,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:30:42,196 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:30:42,196 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:30:42,196 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:30:42,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:30:42,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:30:42,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:30:42,197 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:30:42,209 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:30:42,210 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:42,212 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:42,214 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:42,253 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 12:30:42,254 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 12:30:42,259 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 12:30:42,262 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 12:30:43,223 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 12:30:43,435 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 12:30:43,436 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 12:30:43,443 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 12:30:43,456 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 12:30:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 12:30:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 12:30:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 12:30:43,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 12:30:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:43,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300634064] [2020-10-16 12:30:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:43,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300634064] [2020-10-16 12:30:43,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:43,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:30:43,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122284167] [2020-10-16 12:30:43,705 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:43,708 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:43,723 INFO L258 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-16 12:30:43,740 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:43,747 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:43,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:30:43,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:30:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:30:43,766 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 12:30:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:43,831 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 12:30:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:30:43,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 12:30:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:43,845 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:43,846 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 12:30:43,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 12:30:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 12:30:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 12:30:43,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 12:30:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 12:30:43,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:30:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 12:30:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 12:30:43,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:30:43,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 12:30:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:43,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211869823] [2020-10-16 12:30:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211869823] [2020-10-16 12:30:44,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:44,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:30:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1068356557] [2020-10-16 12:30:44,022 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,023 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,026 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-16 12:30:44,026 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,047 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:44,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:30:44,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:30:44,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:44,050 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 12:30:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:44,083 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 12:30:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:30:44,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 12:30:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:44,085 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:44,086 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:44,087 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 [2020-10-16 12:30:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 12:30:44,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 12:30:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:44,096 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 12:30:44,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:30:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 12:30:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:30:44,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:44,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:44,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 12:30:44,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 12:30:44,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:44,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366060748] [2020-10-16 12:30:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366060748] [2020-10-16 12:30:44,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:44,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 12:30:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1556622513] [2020-10-16 12:30:44,172 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,173 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,176 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-16 12:30:44,176 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,201 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,232 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:44,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:30:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:30:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:30:44,234 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-16 12:30:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:44,355 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-10-16 12:30:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:30:44,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-16 12:30:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:44,357 INFO L225 Difference]: With dead ends: 62 [2020-10-16 12:30:44,357 INFO L226 Difference]: Without dead ends: 44 [2020-10-16 12:30:44,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-16 12:30:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-16 12:30:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 12:30:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 12:30:44,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-10-16 12:30:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:44,364 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 12:30:44,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:30:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 12:30:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:44,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:44,366 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:44,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 12:30:44,366 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-10-16 12:30:44,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:44,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759109982] [2020-10-16 12:30:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759109982] [2020-10-16 12:30:44,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384332808] [2020-10-16 12:30:44,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:44,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:44,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:44,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1289067673] [2020-10-16 12:30:44,572 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,573 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,576 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-10-16 12:30:44,576 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,583 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,584 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,639 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,639 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,648 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:30:44,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:44,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:44,650 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-10-16 12:30:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:44,777 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-16 12:30:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:44,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:44,779 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:44,779 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:44,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-10-16 12:30:44,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-10-16 12:30:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:44,787 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-10-16 12:30:44,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-10-16 12:30:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:44,788 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:45,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:45,004 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-10-16 12:30:45,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426594364] [2020-10-16 12:30:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426594364] [2020-10-16 12:30:45,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075172510] [2020-10-16 12:30:45,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 12:30:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:45,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:45,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109579744] [2020-10-16 12:30:45,157 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:45,159 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:45,161 INFO L258 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-16 12:30:45,161 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:45,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,200 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:30:45,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:45,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:45,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:45,202 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-10-16 12:30:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,391 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-10-16 12:30:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:45,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,392 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:45,392 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:45,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-16 12:30:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-10-16 12:30:45,399 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-10-16 12:30:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:45,399 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-10-16 12:30:45,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-10-16 12:30:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:45,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:45,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:45,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,613 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-10-16 12:30:45,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:45,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180621372] [2020-10-16 12:30:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180621372] [2020-10-16 12:30:45,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138465392] [2020-10-16 12:30:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:45,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111512179] [2020-10-16 12:30:45,774 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:45,775 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:45,778 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-10-16 12:30:45,778 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:45,793 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,815 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:45,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:45,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:45,817 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-10-16 12:30:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,972 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-10-16 12:30:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:45,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,974 INFO L225 Difference]: With dead ends: 64 [2020-10-16 12:30:45,974 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 12:30:45,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:30:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 12:30:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 12:30:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 12:30:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-10-16 12:30:45,981 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-10-16 12:30:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:45,981 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-10-16 12:30:45,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-10-16 12:30:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:45,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:45,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:46,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:46,193 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-10-16 12:30:46,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:46,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066572446] [2020-10-16 12:30:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066572446] [2020-10-16 12:30:46,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854162028] [2020-10-16 12:30:46,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:46,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:46,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:46,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:46,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675979732] [2020-10-16 12:30:46,376 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:46,377 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:46,379 INFO L258 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-16 12:30:46,379 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:46,407 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:46,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:46,432 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:30:46,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:46,434 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-10-16 12:30:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:46,652 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-10-16 12:30:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:46,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:46,653 INFO L225 Difference]: With dead ends: 63 [2020-10-16 12:30:46,653 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 12:30:46,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:30:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 12:30:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-10-16 12:30:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 12:30:46,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-10-16 12:30:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:46,665 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 12:30:46,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 12:30:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:46,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:46,666 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:46,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:46,867 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-10-16 12:30:46,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:46,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123424086] [2020-10-16 12:30:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123424086] [2020-10-16 12:30:46,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013638400] [2020-10-16 12:30:46,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:30:47,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:47,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1582708816] [2020-10-16 12:30:47,028 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:47,029 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:47,033 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-10-16 12:30:47,033 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:47,049 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,049 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,066 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,080 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,097 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:30:47,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:47,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:47,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:47,099 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-10-16 12:30:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:47,257 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-10-16 12:30:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:47,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:47,259 INFO L225 Difference]: With dead ends: 60 [2020-10-16 12:30:47,259 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:47,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 12:30:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:47,264 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-10-16 12:30:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:47,265 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:47,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:47,266 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:47,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,477 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-10-16 12:30:47,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:47,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953990972] [2020-10-16 12:30:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953990972] [2020-10-16 12:30:47,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344931777] [2020-10-16 12:30:47,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:47,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:47,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907480790] [2020-10-16 12:30:47,628 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:47,630 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:47,632 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:47,633 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:47,648 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,648 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,666 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:30:47,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:47,668 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-10-16 12:30:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:47,957 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 12:30:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:47,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:47,959 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:47,959 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 12:30:47,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 12:30:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 12:30:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 12:30:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-10-16 12:30:47,971 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-10-16 12:30:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:47,972 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-10-16 12:30:47,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-10-16 12:30:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:47,973 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:48,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:48,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-10-16 12:30:48,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:48,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271810870] [2020-10-16 12:30:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271810870] [2020-10-16 12:30:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699457033] [2020-10-16 12:30:48,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:48,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:48,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196752109] [2020-10-16 12:30:48,336 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:48,337 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:48,339 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:48,339 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:48,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:48,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:48,367 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:48,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:48,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:48,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:48,369 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-10-16 12:30:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:48,653 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-10-16 12:30:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:48,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:48,655 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:48,655 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 12:30:48,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:30:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 12:30:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-16 12:30:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 12:30:48,662 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-10-16 12:30:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:48,662 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 12:30:48,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 12:30:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:48,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:48,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:48,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 12:30:48,874 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-10-16 12:30:48,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:48,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745702442] [2020-10-16 12:30:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745702442] [2020-10-16 12:30:48,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715972918] [2020-10-16 12:30:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:49,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:30:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:49,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:49,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [558425849] [2020-10-16 12:30:49,041 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:49,042 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:49,045 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-10-16 12:30:49,045 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:49,079 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:49,079 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:49,099 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:49,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:49,101 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-10-16 12:30:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:49,314 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-10-16 12:30:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:49,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:49,315 INFO L225 Difference]: With dead ends: 70 [2020-10-16 12:30:49,315 INFO L226 Difference]: Without dead ends: 64 [2020-10-16 12:30:49,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:30:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-16 12:30:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-16 12:30:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 12:30:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-10-16 12:30:49,320 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-10-16 12:30:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:49,320 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-10-16 12:30:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-10-16 12:30:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:49,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:49,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:49,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 12:30:49,522 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-10-16 12:30:49,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:49,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785149607] [2020-10-16 12:30:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785149607] [2020-10-16 12:30:49,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454502917] [2020-10-16 12:30:49,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:49,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1689276665] [2020-10-16 12:30:49,739 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:49,741 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:49,744 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:49,744 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:49,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:49,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:49,780 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:30:49,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:49,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:49,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:49,782 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-10-16 12:30:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:50,031 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 12:30:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:50,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:50,032 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:50,032 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:50,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:30:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-16 12:30:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 12:30:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-10-16 12:30:50,037 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-10-16 12:30:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:50,037 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-10-16 12:30:50,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-10-16 12:30:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:50,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:50,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:50,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,250 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-10-16 12:30:50,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:50,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687763242] [2020-10-16 12:30:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687763242] [2020-10-16 12:30:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119588404] [2020-10-16 12:30:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:30:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:50,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1766600010] [2020-10-16 12:30:50,428 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:50,429 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:50,431 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:50,431 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:50,446 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,463 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:30:50,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:50,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:50,464 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-10-16 12:30:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:50,753 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-10-16 12:30:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:50,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:50,754 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:50,754 INFO L226 Difference]: Without dead ends: 57 [2020-10-16 12:30:50,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-16 12:30:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-16 12:30:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 12:30:50,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-10-16 12:30:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:50,759 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 12:30:50,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 12:30:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:50,760 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:50,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,966 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-10-16 12:30:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:50,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499932937] [2020-10-16 12:30:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499932937] [2020-10-16 12:30:51,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655039107] [2020-10-16 12:30:51,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:51,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:51,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:51,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:51,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [635603854] [2020-10-16 12:30:51,121 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:51,122 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:51,126 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-10-16 12:30:51,126 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:51,137 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,137 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,175 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,175 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,188 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,188 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,192 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,192 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,204 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:30:51,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:51,206 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-10-16 12:30:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:51,417 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-10-16 12:30:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:51,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:51,419 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:51,419 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 12:30:51,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 12:30:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 12:30:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 12:30:51,423 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-10-16 12:30:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:51,424 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 12:30:51,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 12:30:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:51,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:51,425 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:51,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 12:30:51,635 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:51,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-10-16 12:30:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:51,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998485864] [2020-10-16 12:30:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998485864] [2020-10-16 12:30:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238097522] [2020-10-16 12:30:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528484810] [2020-10-16 12:30:51,793 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:51,796 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:51,798 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:51,798 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:51,811 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,811 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,832 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:30:51,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:51,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:51,833 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-10-16 12:30:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:52,105 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-10-16 12:30:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:52,106 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:52,107 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:52,107 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 12:30:52,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 12:30:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 12:30:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 12:30:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-10-16 12:30:52,115 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-10-16 12:30:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:52,115 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-10-16 12:30:52,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-10-16 12:30:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:52,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:52,118 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:52,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 12:30:52,327 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-10-16 12:30:52,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:52,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730846563] [2020-10-16 12:30:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730846563] [2020-10-16 12:30:52,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76797816] [2020-10-16 12:30:52,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:52,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [676655861] [2020-10-16 12:30:52,478 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:52,479 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:52,481 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:52,481 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:52,490 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:52,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:52,510 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:52,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:52,511 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-10-16 12:30:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:52,844 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 12:30:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:52,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:52,846 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:30:52,846 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:30:52,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:30:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:30:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-16 12:30:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-10-16 12:30:52,851 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-10-16 12:30:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:52,851 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-10-16 12:30:52,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-10-16 12:30:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:52,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:52,852 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:53,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:30:53,058 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-10-16 12:30:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:53,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213968483] [2020-10-16 12:30:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213968483] [2020-10-16 12:30:53,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538655651] [2020-10-16 12:30:53,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 12:30:53,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:53,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1610884646] [2020-10-16 12:30:53,233 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:53,234 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:53,236 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:53,236 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:53,238 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,238 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,260 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:30:53,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:53,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:53,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:53,261 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-10-16 12:30:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:53,636 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-10-16 12:30:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:53,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:53,638 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:53,638 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 12:30:53,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 12:30:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-16 12:30:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 12:30:53,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-10-16 12:30:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:53,642 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 12:30:53,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 12:30:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:53,643 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:53,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,851 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-10-16 12:30:53,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131685255] [2020-10-16 12:30:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131685255] [2020-10-16 12:30:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544780134] [2020-10-16 12:30:53,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:54,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32486] [2020-10-16 12:30:54,040 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:54,042 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:54,047 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-10-16 12:30:54,047 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:54,054 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:54,055 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:54,079 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:54,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:54,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:54,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:54,080 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-10-16 12:30:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:54,323 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 12:30:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:54,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:54,325 INFO L225 Difference]: With dead ends: 78 [2020-10-16 12:30:54,325 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 12:30:54,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 12:30:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-16 12:30:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 12:30:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-10-16 12:30:54,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-10-16 12:30:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:54,330 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-10-16 12:30:54,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-10-16 12:30:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:54,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:54,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:54,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 12:30:54,544 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-10-16 12:30:54,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:54,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070595637] [2020-10-16 12:30:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070595637] [2020-10-16 12:30:54,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962573507] [2020-10-16 12:30:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:54,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 12:30:54,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:54,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [700501158] [2020-10-16 12:30:54,771 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:54,773 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:54,775 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:54,776 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:54,778 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:54,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:54,806 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:30:54,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:54,808 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-10-16 12:30:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:55,117 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-10-16 12:30:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:55,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:55,119 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:55,119 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:55,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:30:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 12:30:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 12:30:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 12:30:55,122 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-10-16 12:30:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:55,122 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 12:30:55,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 12:30:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:55,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:55,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:55,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:55,332 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-10-16 12:30:55,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:55,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063238687] [2020-10-16 12:30:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063238687] [2020-10-16 12:30:55,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939325417] [2020-10-16 12:30:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:55,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:55,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:55,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:55,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1629419707] [2020-10-16 12:30:55,516 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:55,518 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:55,521 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:55,522 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:55,526 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:55,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:55,562 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:30:55,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:55,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:55,564 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-10-16 12:30:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:55,929 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-10-16 12:30:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:55,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:55,930 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:55,931 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:55,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:30:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-16 12:30:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:30:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-10-16 12:30:55,938 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-10-16 12:30:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:55,938 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-10-16 12:30:55,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-10-16 12:30:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:55,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:55,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:56,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:56,150 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-10-16 12:30:56,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:56,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214816407] [2020-10-16 12:30:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214816407] [2020-10-16 12:30:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851889404] [2020-10-16 12:30:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:56,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:56,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876319249] [2020-10-16 12:30:56,308 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:56,310 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:56,312 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:56,312 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:56,315 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:56,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:56,343 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:30:56,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:56,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:56,344 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-10-16 12:30:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:56,771 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-10-16 12:30:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:56,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:56,773 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:56,773 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:56,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:30:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 12:30:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:56,777 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-10-16 12:30:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:56,777 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:56,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:56,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:56,778 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:56,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 12:30:56,987 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:56,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-10-16 12:30:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:56,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228701234] [2020-10-16 12:30:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228701234] [2020-10-16 12:30:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386692128] [2020-10-16 12:30:57,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:57,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1853533064] [2020-10-16 12:30:57,177 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:57,178 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:57,182 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-10-16 12:30:57,182 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:57,187 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,187 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,219 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,219 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,233 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,233 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,244 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:30:57,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:57,245 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-10-16 12:30:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:57,522 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-10-16 12:30:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:57,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:57,524 INFO L225 Difference]: With dead ends: 72 [2020-10-16 12:30:57,524 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 12:30:57,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 12:30:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 12:30:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 12:30:57,529 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-10-16 12:30:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:57,529 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 12:30:57,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 12:30:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:57,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:57,530 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:57,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:57,738 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-10-16 12:30:57,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:57,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159457545] [2020-10-16 12:30:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159457545] [2020-10-16 12:30:57,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143611364] [2020-10-16 12:30:57,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:57,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:30:57,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:57,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1786613784] [2020-10-16 12:30:57,909 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:57,911 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:57,913 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:57,913 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:57,914 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,940 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:30:57,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:57,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:57,941 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-10-16 12:30:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:58,252 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-10-16 12:30:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:58,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:58,254 INFO L225 Difference]: With dead ends: 92 [2020-10-16 12:30:58,254 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 12:30:58,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 12:30:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-10-16 12:30:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 12:30:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-10-16 12:30:58,258 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-10-16 12:30:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:58,258 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-10-16 12:30:58,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-10-16 12:30:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:58,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:58,259 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:58,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 12:30:58,470 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-10-16 12:30:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:58,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282310365] [2020-10-16 12:30:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282310365] [2020-10-16 12:30:58,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052739158] [2020-10-16 12:30:58,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:58,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:58,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605754996] [2020-10-16 12:30:58,673 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:58,675 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:58,678 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:58,678 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:58,687 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:58,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:58,704 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:30:58,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:58,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:58,705 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-10-16 12:30:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:59,099 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-10-16 12:30:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:30:59,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:59,100 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:59,101 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:59,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 12:30:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-16 12:30:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:30:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-10-16 12:30:59,104 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-10-16 12:30:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:59,105 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-10-16 12:30:59,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-10-16 12:30:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:59,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:59,106 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:59,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 12:30:59,315 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-10-16 12:30:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542992405] [2020-10-16 12:30:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542992405] [2020-10-16 12:30:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540080207] [2020-10-16 12:30:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:59,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:30:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [846853371] [2020-10-16 12:30:59,476 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:59,477 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:59,480 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:59,480 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:59,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:59,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:59,512 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:30:59,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:59,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:59,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:59,513 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-10-16 12:30:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:59,971 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-10-16 12:30:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:30:59,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:59,972 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:59,972 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:59,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:30:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 12:30:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 12:30:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-10-16 12:30:59,976 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-10-16 12:30:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:59,976 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-10-16 12:30:59,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-10-16 12:30:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:59,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:59,977 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:00,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:00,191 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-10-16 12:31:00,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:00,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535364956] [2020-10-16 12:31:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535364956] [2020-10-16 12:31:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374021640] [2020-10-16 12:31:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:00,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 12:31:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:31:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:00,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:31:00,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868360780] [2020-10-16 12:31:00,382 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:00,384 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:00,386 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:31:00,386 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:00,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:00,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:00,417 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:00,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:31:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:31:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:31:00,418 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-10-16 12:31:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:00,915 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-10-16 12:31:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:31:00,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:31:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:00,917 INFO L225 Difference]: With dead ends: 90 [2020-10-16 12:31:00,917 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 12:31:00,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:31:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 12:31:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-16 12:31:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:31:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 12:31:00,920 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-10-16 12:31:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:00,921 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 12:31:00,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:31:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 12:31:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:00,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:00,921 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:01,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 12:31:01,124 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-10-16 12:31:01,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:01,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237138740] [2020-10-16 12:31:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:01,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237138740] [2020-10-16 12:31:01,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012074147] [2020-10-16 12:31:01,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:01,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1024698402] [2020-10-16 12:31:01,319 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:01,321 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:01,324 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-10-16 12:31:01,324 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:01,332 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:01,332 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:01,364 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:01,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:01,366 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-10-16 12:31:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:01,606 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-10-16 12:31:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:31:01,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:01,607 INFO L225 Difference]: With dead ends: 86 [2020-10-16 12:31:01,607 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 12:31:01,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:31:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 12:31:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 12:31:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:31:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-10-16 12:31:01,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-10-16 12:31:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:01,610 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-10-16 12:31:01,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-10-16 12:31:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:01,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:01,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:01,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:01,818 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-10-16 12:31:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:01,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763480112] [2020-10-16 12:31:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:01,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763480112] [2020-10-16 12:31:01,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624113592] [2020-10-16 12:31:01,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:02,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:02,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:02,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245346086] [2020-10-16 12:31:02,023 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:02,025 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:02,028 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:02,029 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:02,045 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,046 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:02,065 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:02,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:02,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:02,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:02,067 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-10-16 12:31:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:02,450 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-10-16 12:31:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:31:02,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:02,452 INFO L225 Difference]: With dead ends: 83 [2020-10-16 12:31:02,452 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 12:31:02,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:31:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 12:31:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-16 12:31:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 12:31:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-10-16 12:31:02,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-10-16 12:31:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:02,462 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-10-16 12:31:02,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-10-16 12:31:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:02,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:02,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:02,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 12:31:02,676 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-10-16 12:31:02,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:02,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598946199] [2020-10-16 12:31:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:02,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598946199] [2020-10-16 12:31:02,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868125074] [2020-10-16 12:31:02,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:02,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:31:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:02,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:02,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:02,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790469886] [2020-10-16 12:31:02,970 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:02,971 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:02,976 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:02,977 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:02,994 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,995 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:03,024 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:03,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:03,025 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-10-16 12:31:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:03,429 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-10-16 12:31:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:03,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:03,434 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:03,434 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:03,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:31:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-16 12:31:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 12:31:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-10-16 12:31:03,437 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-10-16 12:31:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:03,438 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-10-16 12:31:03,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-10-16 12:31:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:03,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:03,438 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:03,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 12:31:03,649 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-10-16 12:31:03,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:03,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667535117] [2020-10-16 12:31:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:03,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667535117] [2020-10-16 12:31:03,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652082921] [2020-10-16 12:31:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:03,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:03,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:03,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:03,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [907126673] [2020-10-16 12:31:03,848 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:03,851 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:03,854 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:03,855 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:03,867 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:03,867 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:03,890 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:03,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:03,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:03,892 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-10-16 12:31:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:04,470 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-10-16 12:31:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:04,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:04,472 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:04,472 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:04,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 12:31:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-16 12:31:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 12:31:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-10-16 12:31:04,478 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-10-16 12:31:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:04,478 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-10-16 12:31:04,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-10-16 12:31:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:04,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:04,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:04,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:04,691 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-10-16 12:31:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:04,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500792656] [2020-10-16 12:31:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:04,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500792656] [2020-10-16 12:31:04,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621403816] [2020-10-16 12:31:04,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:04,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:31:04,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:04,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:04,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:04,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306669970] [2020-10-16 12:31:04,989 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:04,992 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:04,997 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:04,997 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:05,014 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:05,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:05,038 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:05,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:05,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:05,039 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-10-16 12:31:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:05,620 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-10-16 12:31:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:31:05,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:05,624 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:05,624 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:31:05,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:31:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-10-16 12:31:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:31:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 12:31:05,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-10-16 12:31:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 12:31:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 12:31:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:05,629 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:05,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:05,839 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:05,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-10-16 12:31:05,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:05,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621633208] [2020-10-16 12:31:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621633208] [2020-10-16 12:31:06,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949322842] [2020-10-16 12:31:06,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:06,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:31:06,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:06,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:06,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304870913] [2020-10-16 12:31:06,064 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:06,065 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:06,070 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-10-16 12:31:06,070 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:06,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,092 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,093 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,115 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,126 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,132 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:31:06,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:06,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:06,134 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-10-16 12:31:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:06,431 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-10-16 12:31:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:31:06,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:06,433 INFO L225 Difference]: With dead ends: 78 [2020-10-16 12:31:06,433 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 12:31:06,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:31:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 12:31:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 12:31:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 12:31:06,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-10-16 12:31:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:06,437 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 12:31:06,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 12:31:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:06,438 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:06,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 12:31:06,649 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-10-16 12:31:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:06,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674630445] [2020-10-16 12:31:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:06,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674630445] [2020-10-16 12:31:06,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853599740] [2020-10-16 12:31:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:06,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:06,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:06,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1049184154] [2020-10-16 12:31:06,858 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:06,860 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:06,864 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:06,864 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:06,869 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,869 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,891 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:31:06,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:06,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:06,892 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-10-16 12:31:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:07,313 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-10-16 12:31:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:07,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:07,314 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:31:07,315 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:31:07,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:31:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:31:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-10-16 12:31:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 12:31:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-10-16 12:31:07,319 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-10-16 12:31:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:07,320 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-10-16 12:31:07,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-10-16 12:31:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:07,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:07,321 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:07,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:07,532 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:07,532 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-10-16 12:31:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:07,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539164010] [2020-10-16 12:31:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:07,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539164010] [2020-10-16 12:31:07,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894332242] [2020-10-16 12:31:07,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:07,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:07,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:07,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:07,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:07,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:07,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [407570816] [2020-10-16 12:31:07,729 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:07,731 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:07,734 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:07,735 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:07,739 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:07,740 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:07,762 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:07,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:07,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:07,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:07,764 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-10-16 12:31:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:08,194 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-10-16 12:31:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:08,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:08,200 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:08,200 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:08,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:31:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-10-16 12:31:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-10-16 12:31:08,203 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-10-16 12:31:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:08,204 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-10-16 12:31:08,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-10-16 12:31:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:08,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:08,204 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:08,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 12:31:08,405 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-10-16 12:31:08,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:08,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634050546] [2020-10-16 12:31:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634050546] [2020-10-16 12:31:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214695978] [2020-10-16 12:31:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:08,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:31:08,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:08,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:08,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:08,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1707832317] [2020-10-16 12:31:08,609 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:08,611 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:08,615 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:08,615 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:08,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:08,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:08,656 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:08,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:08,657 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-10-16 12:31:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:09,166 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-10-16 12:31:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:09,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:09,168 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:09,168 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:09,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-16 12:31:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 12:31:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-10-16 12:31:09,179 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-10-16 12:31:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:09,179 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-10-16 12:31:09,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-10-16 12:31:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:09,182 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:09,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 12:31:09,394 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-10-16 12:31:09,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:09,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358696140] [2020-10-16 12:31:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:09,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358696140] [2020-10-16 12:31:09,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108824440] [2020-10-16 12:31:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:09,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:09,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:09,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:09,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:09,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1955044670] [2020-10-16 12:31:09,602 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:09,604 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:09,608 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:09,608 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:09,620 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:09,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:09,637 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:09,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:09,638 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-10-16 12:31:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:10,214 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 12:31:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:10,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:10,216 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:10,216 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:10,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 12:31:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 12:31:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-10-16 12:31:10,219 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-10-16 12:31:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:10,220 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-10-16 12:31:10,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-10-16 12:31:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:10,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:10,220 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:10,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 12:31:10,421 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:10,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-10-16 12:31:10,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:10,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879196901] [2020-10-16 12:31:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:10,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879196901] [2020-10-16 12:31:10,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120362326] [2020-10-16 12:31:10,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:10,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 12:31:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:10,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:10,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:10,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157482712] [2020-10-16 12:31:10,609 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:10,611 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:10,614 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:10,614 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:10,628 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:10,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:10,646 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:10,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:10,647 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-10-16 12:31:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:11,269 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 12:31:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:31:11,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:11,271 INFO L225 Difference]: With dead ends: 98 [2020-10-16 12:31:11,271 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 12:31:11,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 12:31:11,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-16 12:31:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:31:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 12:31:11,275 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-10-16 12:31:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:11,275 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 12:31:11,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 12:31:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:11,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:11,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:11,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 12:31:11,477 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-10-16 12:31:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:11,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553740783] [2020-10-16 12:31:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553740783] [2020-10-16 12:31:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869591504] [2020-10-16 12:31:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:11,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:31:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:11,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:11,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [493024404] [2020-10-16 12:31:11,687 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:11,689 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:11,692 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-10-16 12:31:11,692 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:11,700 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:11,701 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:11,727 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:11,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:11,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:11,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:11,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:11,729 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-10-16 12:31:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:12,085 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-10-16 12:31:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:31:12,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:12,087 INFO L225 Difference]: With dead ends: 94 [2020-10-16 12:31:12,087 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 12:31:12,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:31:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 12:31:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-16 12:31:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 12:31:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-10-16 12:31:12,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-10-16 12:31:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:12,091 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-10-16 12:31:12,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-10-16 12:31:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:12,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:12,092 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:12,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 12:31:12,299 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-10-16 12:31:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:12,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725662213] [2020-10-16 12:31:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725662213] [2020-10-16 12:31:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803668016] [2020-10-16 12:31:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:12,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:12,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1618134541] [2020-10-16 12:31:12,521 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:12,523 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:12,527 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:12,527 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:12,550 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:12,551 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:12,576 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:12,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:12,577 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-10-16 12:31:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:12,989 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-10-16 12:31:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:12,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:12,991 INFO L225 Difference]: With dead ends: 91 [2020-10-16 12:31:12,991 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 12:31:12,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 12:31:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 12:31:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-10-16 12:31:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 12:31:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-10-16 12:31:12,996 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-10-16 12:31:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:12,996 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-10-16 12:31:12,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-10-16 12:31:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:12,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:12,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:13,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 12:31:13,206 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-10-16 12:31:13,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989619970] [2020-10-16 12:31:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:13,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989619970] [2020-10-16 12:31:13,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784442979] [2020-10-16 12:31:13,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:13,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:13,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:13,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:13,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:13,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [15491850] [2020-10-16 12:31:13,405 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:13,407 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:13,410 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:13,411 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:13,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:13,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:13,441 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:13,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:13,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:13,442 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-10-16 12:31:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:13,929 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-10-16 12:31:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:13,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:13,930 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:31:13,931 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:31:13,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:31:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-16 12:31:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 12:31:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-10-16 12:31:13,934 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-10-16 12:31:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:13,934 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-10-16 12:31:13,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-10-16 12:31:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:13,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:13,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:14,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 12:31:14,144 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-10-16 12:31:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:14,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695238938] [2020-10-16 12:31:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695238938] [2020-10-16 12:31:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376173263] [2020-10-16 12:31:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:14,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:31:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:14,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:14,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:14,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1855212240] [2020-10-16 12:31:14,368 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:14,370 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:14,373 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:14,374 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:14,382 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:14,382 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:14,411 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:14,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:14,412 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-10-16 12:31:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:14,953 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-10-16 12:31:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:14,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:14,955 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:14,955 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:14,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 12:31:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-16 12:31:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 12:31:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-10-16 12:31:14,959 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-10-16 12:31:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:14,960 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-10-16 12:31:14,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-10-16 12:31:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:14,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:14,961 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:15,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:15,171 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-10-16 12:31:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:15,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145452809] [2020-10-16 12:31:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:15,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145452809] [2020-10-16 12:31:15,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149021975] [2020-10-16 12:31:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:15,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:15,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:15,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:15,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1225677308] [2020-10-16 12:31:15,368 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:15,371 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:15,377 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:15,378 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:15,388 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:15,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:15,410 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:15,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:15,412 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-10-16 12:31:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:16,085 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-10-16 12:31:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:16,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:16,086 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:16,086 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:16,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-16 12:31:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-10-16 12:31:16,090 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-10-16 12:31:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:16,091 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-10-16 12:31:16,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-10-16 12:31:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:16,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:16,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:16,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:16,302 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-10-16 12:31:16,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:16,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715983669] [2020-10-16 12:31:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715983669] [2020-10-16 12:31:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220530260] [2020-10-16 12:31:16,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:16,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 12:31:16,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:16,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:16,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461390962] [2020-10-16 12:31:16,495 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:16,496 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:16,499 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:16,499 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:16,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:16,509 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:16,532 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:31:16,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:16,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:16,533 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-10-16 12:31:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:17,219 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-10-16 12:31:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:31:17,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:17,220 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:17,221 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:17,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-16 12:31:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:31:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 12:31:17,224 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-10-16 12:31:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:17,224 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 12:31:17,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 12:31:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:17,225 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:17,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:17,426 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-10-16 12:31:17,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:17,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683304383] [2020-10-16 12:31:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:17,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683304383] [2020-10-16 12:31:17,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225071120] [2020-10-16 12:31:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:17,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:17,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:17,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:17,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:17,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1670961307] [2020-10-16 12:31:17,667 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:17,669 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:17,674 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-10-16 12:31:17,674 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:17,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:17,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:17,698 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:17,699 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:17,714 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:17,714 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:17,721 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:17,722 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:17,729 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:31:17,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:17,730 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-10-16 12:31:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:18,148 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-10-16 12:31:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:18,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:18,150 INFO L225 Difference]: With dead ends: 84 [2020-10-16 12:31:18,150 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 12:31:18,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:31:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 12:31:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 12:31:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 12:31:18,154 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-10-16 12:31:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:18,155 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 12:31:18,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 12:31:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:18,156 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:18,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 12:31:18,357 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-10-16 12:31:18,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:18,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232870966] [2020-10-16 12:31:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232870966] [2020-10-16 12:31:18,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218591079] [2020-10-16 12:31:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:18,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:18,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:18,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [344721034] [2020-10-16 12:31:18,677 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:18,680 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:18,685 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:18,685 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:18,686 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:18,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:18,728 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:31:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:18,729 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-10-16 12:31:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:19,227 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-10-16 12:31:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:19,228 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:19,228 INFO L225 Difference]: With dead ends: 112 [2020-10-16 12:31:19,229 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 12:31:19,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 12:31:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-16 12:31:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 12:31:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-10-16 12:31:19,232 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-10-16 12:31:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:19,232 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-10-16 12:31:19,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-10-16 12:31:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:19,233 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:19,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:19,444 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-10-16 12:31:19,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:19,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545221900] [2020-10-16 12:31:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:19,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545221900] [2020-10-16 12:31:19,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103427065] [2020-10-16 12:31:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:19,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:19,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:19,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:19,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737822923] [2020-10-16 12:31:19,661 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:19,664 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:19,668 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:19,668 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:19,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:19,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:19,695 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:19,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:19,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:19,696 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-10-16 12:31:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:20,197 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-10-16 12:31:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:20,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:20,199 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:31:20,199 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 12:31:20,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 12:31:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 12:31:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-10-16 12:31:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-10-16 12:31:20,204 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-10-16 12:31:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:20,204 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-10-16 12:31:20,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-10-16 12:31:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:20,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:20,205 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:20,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:20,415 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-10-16 12:31:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:20,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167174359] [2020-10-16 12:31:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:20,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167174359] [2020-10-16 12:31:20,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147865248] [2020-10-16 12:31:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:20,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:31:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:20,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:20,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:20,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721410535] [2020-10-16 12:31:20,668 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:20,670 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:20,675 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:20,675 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:20,685 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:20,685 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:20,704 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:20,705 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-10-16 12:31:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:21,256 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-16 12:31:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:21,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:21,258 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:31:21,258 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:31:21,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:31:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-10-16 12:31:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 12:31:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-10-16 12:31:21,262 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-10-16 12:31:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:21,262 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-10-16 12:31:21,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-10-16 12:31:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:21,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:21,263 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:21,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 12:31:21,471 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-10-16 12:31:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:21,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780739723] [2020-10-16 12:31:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:21,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780739723] [2020-10-16 12:31:21,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926142339] [2020-10-16 12:31:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:21,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:21,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:21,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:21,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:21,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [714528493] [2020-10-16 12:31:21,689 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:21,691 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:21,694 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:21,694 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:21,695 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:21,695 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:21,730 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:21,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:21,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:21,731 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-10-16 12:31:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:22,399 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 12:31:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:22,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:22,400 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:22,401 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:22,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:31:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-10-16 12:31:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-10-16 12:31:22,405 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-10-16 12:31:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:22,406 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-10-16 12:31:22,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-10-16 12:31:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:22,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:22,406 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:22,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 12:31:22,618 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-10-16 12:31:22,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:22,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769420165] [2020-10-16 12:31:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769420165] [2020-10-16 12:31:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87093644] [2020-10-16 12:31:22,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:22,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:31:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:22,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:22,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [388925516] [2020-10-16 12:31:22,836 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:22,838 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:22,842 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:22,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:22,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:22,852 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:22,876 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:22,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:22,877 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-10-16 12:31:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:23,592 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-10-16 12:31:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:23,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:23,594 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:23,594 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:23,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-10-16 12:31:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-10-16 12:31:23,597 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-10-16 12:31:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:23,597 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-10-16 12:31:23,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-10-16 12:31:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:23,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:23,598 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:23,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 12:31:23,806 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:23,806 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-10-16 12:31:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435299871] [2020-10-16 12:31:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:23,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435299871] [2020-10-16 12:31:23,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299495] [2020-10-16 12:31:23,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:23,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:24,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:24,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:24,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [602344372] [2020-10-16 12:31:24,019 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:24,021 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:24,025 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:24,025 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:24,027 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:24,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:24,056 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:24,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:24,057 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-10-16 12:31:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:24,813 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-10-16 12:31:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:31:24,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:24,815 INFO L225 Difference]: With dead ends: 106 [2020-10-16 12:31:24,815 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 12:31:24,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 12:31:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-16 12:31:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 12:31:24,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-10-16 12:31:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:24,820 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 12:31:24,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 12:31:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:24,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:24,820 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:25,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:25,022 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-10-16 12:31:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:25,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480334988] [2020-10-16 12:31:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480334988] [2020-10-16 12:31:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680440188] [2020-10-16 12:31:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:25,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:25,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:25,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:25,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1231421217] [2020-10-16 12:31:25,304 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:25,306 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:25,310 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-10-16 12:31:25,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:25,313 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:25,313 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:25,354 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:25,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:25,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:25,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:25,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:25,356 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-10-16 12:31:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:25,787 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-10-16 12:31:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:25,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:25,789 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:31:25,789 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:31:25,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:31:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-10-16 12:31:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 12:31:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-10-16 12:31:25,792 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-10-16 12:31:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:25,793 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-10-16 12:31:25,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-10-16 12:31:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:25,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:25,794 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:26,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:26,003 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-10-16 12:31:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:26,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417065028] [2020-10-16 12:31:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417065028] [2020-10-16 12:31:26,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622292065] [2020-10-16 12:31:26,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:26,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [591299777] [2020-10-16 12:31:26,259 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:26,261 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:26,265 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:26,266 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:26,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:26,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:26,302 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:26,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:26,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:26,303 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-10-16 12:31:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:26,798 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-10-16 12:31:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:26,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:26,800 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:26,801 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:26,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 12:31:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-10-16 12:31:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 12:31:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-10-16 12:31:26,804 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-10-16 12:31:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:26,804 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-10-16 12:31:26,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-10-16 12:31:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:26,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:26,805 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:27,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:27,006 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-10-16 12:31:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:27,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828557342] [2020-10-16 12:31:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:27,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828557342] [2020-10-16 12:31:27,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844941965] [2020-10-16 12:31:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:27,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:31:27,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:27,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:27,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:27,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1762400002] [2020-10-16 12:31:27,271 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:27,273 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:27,276 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:27,276 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:27,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:27,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:27,307 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:27,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:27,308 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-10-16 12:31:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:27,877 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-10-16 12:31:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:27,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:27,879 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:27,879 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:27,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-10-16 12:31:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-10-16 12:31:27,881 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-10-16 12:31:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:27,882 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-10-16 12:31:27,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-10-16 12:31:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:27,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:27,882 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:28,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:28,083 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-10-16 12:31:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:28,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325157063] [2020-10-16 12:31:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:28,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325157063] [2020-10-16 12:31:28,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449754359] [2020-10-16 12:31:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:28,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:28,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:28,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:28,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1573766840] [2020-10-16 12:31:28,321 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:28,324 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:28,328 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:28,328 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:28,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:28,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:28,371 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:28,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:28,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:28,372 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-10-16 12:31:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:29,009 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-10-16 12:31:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:29,010 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:29,011 INFO L225 Difference]: With dead ends: 95 [2020-10-16 12:31:29,011 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 12:31:29,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 12:31:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-16 12:31:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 12:31:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-10-16 12:31:29,015 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-10-16 12:31:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:29,015 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-10-16 12:31:29,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-10-16 12:31:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:29,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:29,015 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:29,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 12:31:29,216 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-10-16 12:31:29,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171990014] [2020-10-16 12:31:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171990014] [2020-10-16 12:31:29,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016965321] [2020-10-16 12:31:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:29,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:31:29,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:29,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:29,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:29,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:29,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1602700431] [2020-10-16 12:31:29,443 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:29,445 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:29,448 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:29,448 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:29,452 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:29,452 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:29,478 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:29,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:29,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:29,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:29,479 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-10-16 12:31:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:30,185 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-10-16 12:31:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:30,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:30,187 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:30,187 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:30,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:31:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-16 12:31:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:31:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-10-16 12:31:30,190 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-10-16 12:31:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:30,190 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-10-16 12:31:30,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-10-16 12:31:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:30,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:30,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:30,393 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-10-16 12:31:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:30,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833881122] [2020-10-16 12:31:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:30,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833881122] [2020-10-16 12:31:30,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497878894] [2020-10-16 12:31:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:30,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:30,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:30,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:30,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:30,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498313610] [2020-10-16 12:31:30,629 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:30,631 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:30,636 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:30,636 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:30,639 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:30,640 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:30,678 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:31:30,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:30,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:30,679 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-10-16 12:31:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:31,465 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-10-16 12:31:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:31,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:31,467 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:31,467 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:31,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:31:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-16 12:31:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:31:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-10-16 12:31:31,470 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-10-16 12:31:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:31,471 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-10-16 12:31:31,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-10-16 12:31:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:31,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:31,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 12:31:31,672 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-10-16 12:31:31,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:31,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317736484] [2020-10-16 12:31:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:31,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317736484] [2020-10-16 12:31:31,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910273277] [2020-10-16 12:31:31,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:31,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:31,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [734705249] [2020-10-16 12:31:31,892 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:31,894 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:31,898 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:31,898 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:31,909 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:31,909 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:31,928 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:31:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:31,930 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-10-16 12:31:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:32,736 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-10-16 12:31:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:31:32,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:32,738 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:32,738 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:32,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:31:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-10-16 12:31:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 12:31:32,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-10-16 12:31:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:32,741 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 12:31:32,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 12:31:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:32,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:32,741 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:32,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 12:31:32,943 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-10-16 12:31:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:32,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480118786] [2020-10-16 12:31:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:33,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480118786] [2020-10-16 12:31:33,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606233080] [2020-10-16 12:31:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:33,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:33,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407630942] [2020-10-16 12:31:33,231 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:33,234 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:33,239 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-10-16 12:31:33,240 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:33,242 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:33,242 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:33,263 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:33,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:33,283 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:33,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:33,293 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:33,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:33,300 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:31:33,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:33,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:33,301 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-10-16 12:31:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:33,723 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-10-16 12:31:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:33,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:33,724 INFO L225 Difference]: With dead ends: 90 [2020-10-16 12:31:33,724 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 12:31:33,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 12:31:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 12:31:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 12:31:33,728 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-10-16 12:31:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:33,729 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 12:31:33,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 12:31:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:33,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:33,730 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:33,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:33,940 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-10-16 12:31:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:33,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823448635] [2020-10-16 12:31:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:34,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823448635] [2020-10-16 12:31:34,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641995435] [2020-10-16 12:31:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:34,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:34,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:34,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:34,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:34,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1585802005] [2020-10-16 12:31:34,217 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:34,219 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:34,224 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:34,225 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:34,237 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:34,237 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:34,257 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:31:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:34,259 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-10-16 12:31:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:34,809 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-10-16 12:31:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:34,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:34,811 INFO L225 Difference]: With dead ends: 122 [2020-10-16 12:31:34,811 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 12:31:34,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 12:31:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-10-16 12:31:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 12:31:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-10-16 12:31:34,814 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-10-16 12:31:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:34,815 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-10-16 12:31:34,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-10-16 12:31:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:34,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:34,815 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:35,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 12:31:35,016 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-10-16 12:31:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:35,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436038804] [2020-10-16 12:31:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:35,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436038804] [2020-10-16 12:31:35,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142877256] [2020-10-16 12:31:35,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:35,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:35,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:35,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:35,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [657863746] [2020-10-16 12:31:35,294 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:35,296 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:35,300 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:35,300 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:35,307 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:35,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:35,330 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:35,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:35,332 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-10-16 12:31:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:35,924 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-10-16 12:31:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:35,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:35,926 INFO L225 Difference]: With dead ends: 119 [2020-10-16 12:31:35,926 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 12:31:35,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:31:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 12:31:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-10-16 12:31:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-10-16 12:31:35,930 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-10-16 12:31:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:35,930 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-10-16 12:31:35,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-10-16 12:31:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:35,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:35,931 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:36,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:36,133 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-10-16 12:31:36,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376242955] [2020-10-16 12:31:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:36,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376242955] [2020-10-16 12:31:36,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083179091] [2020-10-16 12:31:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:36,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:36,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:36,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:36,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:36,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [35528736] [2020-10-16 12:31:36,441 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:36,445 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:36,451 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:36,452 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:36,463 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:36,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:36,495 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:36,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:36,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:36,497 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-10-16 12:31:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:37,188 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-10-16 12:31:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:37,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:37,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:37,189 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:31:37,189 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:31:37,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:31:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-10-16 12:31:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-10-16 12:31:37,192 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-10-16 12:31:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:37,193 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-10-16 12:31:37,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-10-16 12:31:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:37,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:37,193 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:37,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 12:31:37,395 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-10-16 12:31:37,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:37,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615412946] [2020-10-16 12:31:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:37,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615412946] [2020-10-16 12:31:37,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964276960] [2020-10-16 12:31:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:37,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 12:31:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:37,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:37,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1841986479] [2020-10-16 12:31:37,650 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:37,652 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:37,657 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:37,657 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:37,658 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:37,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:37,694 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:37,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:37,695 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-10-16 12:31:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:38,421 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-10-16 12:31:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:38,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:38,427 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:31:38,427 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:31:38,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:31:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-10-16 12:31:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:31:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-10-16 12:31:38,430 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-10-16 12:31:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-10-16 12:31:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-10-16 12:31:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:38,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:38,432 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:38,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:38,641 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-10-16 12:31:38,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:38,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468625403] [2020-10-16 12:31:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:38,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468625403] [2020-10-16 12:31:38,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199599428] [2020-10-16 12:31:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:38,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:38,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:38,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954403322] [2020-10-16 12:31:38,895 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:38,896 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:38,900 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:38,901 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:38,917 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:38,917 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:38,940 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:38,942 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-10-16 12:31:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:39,759 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-10-16 12:31:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:39,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:39,761 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:31:39,761 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:31:39,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:31:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:31:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-10-16 12:31:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:31:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-10-16 12:31:39,764 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-10-16 12:31:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:39,765 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-10-16 12:31:39,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-10-16 12:31:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:39,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:39,765 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:39,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 12:31:39,966 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:39,967 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-10-16 12:31:39,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:39,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317316527] [2020-10-16 12:31:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317316527] [2020-10-16 12:31:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652737811] [2020-10-16 12:31:40,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:40,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:40,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:40,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:40,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1196556460] [2020-10-16 12:31:40,234 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:40,238 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:40,246 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:40,246 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:40,261 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:40,261 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:40,295 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:40,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:40,296 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-10-16 12:31:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:41,288 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 12:31:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:31:41,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:41,289 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:31:41,289 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:31:41,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:31:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:31:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-10-16 12:31:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:31:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-10-16 12:31:41,294 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-10-16 12:31:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:41,295 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-10-16 12:31:41,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-10-16 12:31:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:41,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:41,296 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:41,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:41,505 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-10-16 12:31:41,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:41,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271340749] [2020-10-16 12:31:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271340749] [2020-10-16 12:31:41,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944355008] [2020-10-16 12:31:41,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:41,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:41,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:41,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:41,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:41,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:41,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [415742331] [2020-10-16 12:31:41,742 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:41,745 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:41,750 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:41,750 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:41,761 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:41,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:41,783 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:31:41,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:41,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:41,784 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-10-16 12:31:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:42,714 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 12:31:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:31:42,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:42,716 INFO L225 Difference]: With dead ends: 114 [2020-10-16 12:31:42,716 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 12:31:42,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:31:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 12:31:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-16 12:31:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 12:31:42,719 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-10-16 12:31:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:42,719 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 12:31:42,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 12:31:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:42,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:42,720 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:42,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 12:31:42,920 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-10-16 12:31:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:42,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200690774] [2020-10-16 12:31:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:43,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200690774] [2020-10-16 12:31:43,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299552987] [2020-10-16 12:31:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:43,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:43,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:43,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462811110] [2020-10-16 12:31:43,235 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:43,238 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:43,244 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-10-16 12:31:43,244 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:43,260 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:43,261 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:43,283 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:43,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:43,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:43,284 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-10-16 12:31:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:43,800 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-10-16 12:31:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:43,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:43,802 INFO L225 Difference]: With dead ends: 110 [2020-10-16 12:31:43,802 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 12:31:43,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 12:31:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-10-16 12:31:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-10-16 12:31:43,805 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-10-16 12:31:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:43,805 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-10-16 12:31:43,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-10-16 12:31:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:43,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:43,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:44,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:44,008 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-10-16 12:31:44,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:44,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803958774] [2020-10-16 12:31:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803958774] [2020-10-16 12:31:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017013382] [2020-10-16 12:31:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:44,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:44,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:44,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:44,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2130920644] [2020-10-16 12:31:44,348 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:44,351 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:44,356 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:44,356 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:44,357 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:44,357 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:44,401 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:44,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:44,403 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-10-16 12:31:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:44,974 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-16 12:31:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:44,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:44,975 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:31:44,975 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:31:44,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:31:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-10-16 12:31:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 12:31:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-10-16 12:31:44,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-10-16 12:31:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:44,978 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-10-16 12:31:44,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-10-16 12:31:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:44,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:44,978 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:45,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 12:31:45,179 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-10-16 12:31:45,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:45,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775263278] [2020-10-16 12:31:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:45,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775263278] [2020-10-16 12:31:45,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964011993] [2020-10-16 12:31:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:45,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 12:31:45,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:45,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:45,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:45,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [75200786] [2020-10-16 12:31:45,472 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:45,476 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:45,481 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:45,482 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:45,498 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:45,499 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:45,529 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:45,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:45,530 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-10-16 12:31:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:46,365 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 12:31:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:46,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:46,368 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:46,368 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:46,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:31:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-10-16 12:31:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:31:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-10-16 12:31:46,372 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-10-16 12:31:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:46,373 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-10-16 12:31:46,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-10-16 12:31:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:46,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:46,374 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:46,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 12:31:46,586 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-10-16 12:31:46,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:46,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710080701] [2020-10-16 12:31:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710080701] [2020-10-16 12:31:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192658914] [2020-10-16 12:31:46,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:46,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:46,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:46,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1392317893] [2020-10-16 12:31:46,869 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:46,871 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:46,874 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:46,874 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:46,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:46,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:46,907 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:31:46,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:46,908 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-10-16 12:31:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:47,642 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-10-16 12:31:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:47,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:47,644 INFO L225 Difference]: With dead ends: 103 [2020-10-16 12:31:47,644 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 12:31:47,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:31:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 12:31:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-10-16 12:31:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:31:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-10-16 12:31:47,648 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-10-16 12:31:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:47,648 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-10-16 12:31:47,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-10-16 12:31:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:47,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:47,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 12:31:47,860 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-10-16 12:31:47,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:47,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541640601] [2020-10-16 12:31:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:48,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541640601] [2020-10-16 12:31:48,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275978471] [2020-10-16 12:31:48,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:48,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:48,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:48,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [129166896] [2020-10-16 12:31:48,134 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:48,135 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:48,140 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:48,140 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:48,149 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:48,149 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:48,174 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:31:48,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:48,175 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-10-16 12:31:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:48,960 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-10-16 12:31:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:48,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:48,962 INFO L225 Difference]: With dead ends: 101 [2020-10-16 12:31:48,962 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 12:31:48,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:31:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 12:31:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-16 12:31:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:31:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-10-16 12:31:48,966 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-10-16 12:31:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:48,966 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-10-16 12:31:48,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-10-16 12:31:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:48,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:48,967 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:49,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:49,177 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-10-16 12:31:49,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:49,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958473335] [2020-10-16 12:31:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958473335] [2020-10-16 12:31:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090646663] [2020-10-16 12:31:49,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:49,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:49,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:49,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1086957025] [2020-10-16 12:31:49,438 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:49,449 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:49,453 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:49,453 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:49,456 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:49,456 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:49,485 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:31:49,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:49,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:49,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:49,486 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-10-16 12:31:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:50,370 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-10-16 12:31:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:50,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:50,372 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:50,372 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:31:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-16 12:31:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:31:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-10-16 12:31:50,375 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-10-16 12:31:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:50,375 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-10-16 12:31:50,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-10-16 12:31:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:50,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:50,376 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:50,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:50,586 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-10-16 12:31:50,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:50,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223893866] [2020-10-16 12:31:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:50,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223893866] [2020-10-16 12:31:50,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749942434] [2020-10-16 12:31:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:50,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:50,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:50,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:50,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:50,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487840946] [2020-10-16 12:31:50,848 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:50,850 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:50,854 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:50,854 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:50,857 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:50,857 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:50,889 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:31:50,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:50,890 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-10-16 12:31:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:51,860 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-10-16 12:31:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:31:51,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:51,862 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:51,862 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:51,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:31:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-16 12:31:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:31:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-10-16 12:31:51,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-10-16 12:31:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:51,867 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-10-16 12:31:51,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-10-16 12:31:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:51,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:51,868 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:52,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:52,076 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-10-16 12:31:52,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:52,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453182186] [2020-10-16 12:31:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:52,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453182186] [2020-10-16 12:31:52,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312244200] [2020-10-16 12:31:52,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:52,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:52,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:52,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:52,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:52,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [851627806] [2020-10-16 12:31:52,370 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:52,372 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:52,377 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:52,377 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:52,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:52,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:52,412 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:31:52,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:52,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:52,413 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-10-16 12:31:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:53,438 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-10-16 12:31:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:31:53,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:53,440 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:53,440 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:53,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:31:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-10-16 12:31:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 12:31:53,443 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-10-16 12:31:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:53,444 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 12:31:53,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 12:31:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:53,444 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:53,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 12:31:53,645 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-10-16 12:31:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:53,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103771987] [2020-10-16 12:31:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:53,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103771987] [2020-10-16 12:31:53,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572520247] [2020-10-16 12:31:53,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:53,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:31:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:53,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:53,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1441671386] [2020-10-16 12:31:53,990 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:53,992 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:53,996 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-10-16 12:31:53,997 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:54,007 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:54,007 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:54,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:54,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:54,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:54,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:54,066 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:54,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:54,074 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:31:54,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:54,075 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-10-16 12:31:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:54,565 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-10-16 12:31:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:54,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:54,567 INFO L225 Difference]: With dead ends: 96 [2020-10-16 12:31:54,567 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 12:31:54,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 12:31:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 12:31:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-16 12:31:54,570 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-10-16 12:31:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:54,571 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-16 12:31:54,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-16 12:31:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:54,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:54,571 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:54,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:54,774 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-10-16 12:31:54,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:54,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935291110] [2020-10-16 12:31:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:55,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935291110] [2020-10-16 12:31:55,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437235498] [2020-10-16 12:31:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:55,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:55,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683914995] [2020-10-16 12:31:55,098 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:55,100 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:55,104 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:55,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:55,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:55,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:55,152 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:31:55,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:55,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:55,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:55,153 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-10-16 12:31:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:55,796 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-10-16 12:31:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:55,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:55,798 INFO L225 Difference]: With dead ends: 132 [2020-10-16 12:31:55,798 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 12:31:55,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 12:31:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-10-16 12:31:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-10-16 12:31:55,801 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-10-16 12:31:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:55,801 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-10-16 12:31:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-10-16 12:31:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:55,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:55,802 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:56,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:56,002 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-10-16 12:31:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342245416] [2020-10-16 12:31:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342245416] [2020-10-16 12:31:56,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773349941] [2020-10-16 12:31:56,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:56,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:56,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1021305096] [2020-10-16 12:31:56,317 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:56,318 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:56,323 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:56,323 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:56,331 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:56,331 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:56,358 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:31:56,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:56,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:56,359 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-10-16 12:31:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:57,083 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-10-16 12:31:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:57,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:57,085 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:31:57,085 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:31:57,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:31:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-10-16 12:31:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:31:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-10-16 12:31:57,088 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-10-16 12:31:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:57,089 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-10-16 12:31:57,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-10-16 12:31:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:57,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:57,089 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:57,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:57,290 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:57,291 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-10-16 12:31:57,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:57,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900030442] [2020-10-16 12:31:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900030442] [2020-10-16 12:31:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512819156] [2020-10-16 12:31:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:57,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:31:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:57,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:57,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1154123448] [2020-10-16 12:31:57,600 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:57,602 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:57,606 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:57,607 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:57,614 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:57,615 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:57,639 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:31:57,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:57,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:57,640 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-10-16 12:31:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:58,428 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-10-16 12:31:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:58,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:58,430 INFO L225 Difference]: With dead ends: 127 [2020-10-16 12:31:58,430 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 12:31:58,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:31:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 12:31:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-10-16 12:31:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:31:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-10-16 12:31:58,434 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-10-16 12:31:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:58,434 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-10-16 12:31:58,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-10-16 12:31:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:58,435 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:58,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 12:31:58,643 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-10-16 12:31:58,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:58,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871581032] [2020-10-16 12:31:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871581032] [2020-10-16 12:31:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970866994] [2020-10-16 12:31:58,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:58,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:58,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:58,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:58,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1038038688] [2020-10-16 12:31:58,928 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:58,930 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:58,935 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:58,935 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:58,936 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:58,936 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:58,970 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:31:58,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:58,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:58,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:58,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:58,971 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-10-16 12:31:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:59,818 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-10-16 12:31:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:59,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:59,820 INFO L225 Difference]: With dead ends: 125 [2020-10-16 12:31:59,820 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 12:31:59,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:31:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 12:31:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-10-16 12:31:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:31:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-10-16 12:31:59,824 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-10-16 12:31:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:59,824 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-10-16 12:31:59,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-10-16 12:31:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:59,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:59,825 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:00,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:00,034 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-10-16 12:32:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:00,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130369450] [2020-10-16 12:32:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:00,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130369450] [2020-10-16 12:32:00,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842604789] [2020-10-16 12:32:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:00,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:32:00,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:32:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:00,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:00,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:32:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1098897051] [2020-10-16 12:32:00,335 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:00,337 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:00,343 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:32:00,343 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:00,355 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:00,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:00,379 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:32:00,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:32:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:32:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:32:00,381 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-10-16 12:32:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:01,303 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-10-16 12:32:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:01,304 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:01,305 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:32:01,305 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:32:01,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:32:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:32:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-16 12:32:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 12:32:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-10-16 12:32:01,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-10-16 12:32:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:01,309 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-10-16 12:32:01,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-10-16 12:32:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:32:01,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:01,310 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:01,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:01,521 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-10-16 12:32:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:01,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156538191] [2020-10-16 12:32:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:01,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156538191] [2020-10-16 12:32:01,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190833501] [2020-10-16 12:32:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:01,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:32:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:32:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:01,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:01,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:32:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1382000984] [2020-10-16 12:32:01,817 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:01,819 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:01,823 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:32:01,824 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:01,831 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:01,832 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:01,857 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:32:01,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:32:01,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:32:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:32:01,858 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-10-16 12:32:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:02,865 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-10-16 12:32:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:02,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:02,867 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:32:02,868 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:32:02,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 12:32:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:32:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-16 12:32:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:32:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-10-16 12:32:02,870 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-10-16 12:32:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:02,870 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-10-16 12:32:02,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-10-16 12:32:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:32:02,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:02,871 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:03,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 12:32:03,072 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:03,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-10-16 12:32:03,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:03,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335236966] [2020-10-16 12:32:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:03,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335236966] [2020-10-16 12:32:03,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416649363] [2020-10-16 12:32:03,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:32:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:03,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:03,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:32:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [8586331] [2020-10-16 12:32:03,352 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:03,355 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:03,361 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:32:03,361 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:03,375 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:03,375 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:03,399 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:32:03,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:32:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:32:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:32:03,401 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-10-16 12:32:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:04,481 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-16 12:32:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:04,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:04,483 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:32:04,483 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:32:04,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:32:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:32:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-10-16 12:32:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:32:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-10-16 12:32:04,486 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-10-16 12:32:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:04,486 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-10-16 12:32:04,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-10-16 12:32:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:32:04,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:04,487 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:04,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:04,687 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-10-16 12:32:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:04,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680190959] [2020-10-16 12:32:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:04,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680190959] [2020-10-16 12:32:04,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888918615] [2020-10-16 12:32:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:04,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:32:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:05,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:05,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:32:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1140392608] [2020-10-16 12:32:05,027 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:05,033 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:05,042 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:32:05,042 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:05,056 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:05,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:05,090 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:32:05,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:32:05,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:32:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:32:05,091 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-10-16 12:32:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:06,434 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-10-16 12:32:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 12:32:06,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:06,435 INFO L225 Difference]: With dead ends: 122 [2020-10-16 12:32:06,435 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 12:32:06,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:32:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 12:32:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-10-16 12:32:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:32:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 12:32:06,437 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-10-16 12:32:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:06,437 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 12:32:06,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 12:32:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:06,438 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:06,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:06,639 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-10-16 12:32:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:06,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458817930] [2020-10-16 12:32:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:06,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458817930] [2020-10-16 12:32:06,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797214197] [2020-10-16 12:32:06,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:07,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:32:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:07,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407125431] [2020-10-16 12:32:07,017 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:07,019 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:07,024 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-10-16 12:32:07,024 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:07,027 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:07,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:07,060 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:32:07,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:07,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:07,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:07,061 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-10-16 12:32:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:07,676 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-10-16 12:32:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:32:07,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:07,678 INFO L225 Difference]: With dead ends: 118 [2020-10-16 12:32:07,678 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 12:32:07,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:32:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 12:32:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-10-16 12:32:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:32:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-10-16 12:32:07,681 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-10-16 12:32:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:07,681 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-10-16 12:32:07,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-10-16 12:32:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:07,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:07,681 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:07,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:07,882 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-10-16 12:32:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:07,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515628406] [2020-10-16 12:32:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515628406] [2020-10-16 12:32:08,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478115307] [2020-10-16 12:32:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:08,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:08,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:08,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:08,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336772314] [2020-10-16 12:32:08,241 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:08,243 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:08,248 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:08,248 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:08,251 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:08,252 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:08,287 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:32:08,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:08,287 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-10-16 12:32:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:08,975 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-10-16 12:32:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:08,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:08,976 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:32:08,976 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:32:08,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:32:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:32:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-10-16 12:32:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:32:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-10-16 12:32:08,979 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-10-16 12:32:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:08,979 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-10-16 12:32:08,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-10-16 12:32:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:08,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:08,979 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:09,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:09,180 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-10-16 12:32:09,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668200638] [2020-10-16 12:32:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:09,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668200638] [2020-10-16 12:32:09,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174890928] [2020-10-16 12:32:09,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:09,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:32:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:09,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:09,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [483951822] [2020-10-16 12:32:09,527 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:09,529 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:09,535 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:09,535 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:09,548 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:09,549 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:09,577 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:32:09,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:09,578 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-10-16 12:32:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:10,345 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-10-16 12:32:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:10,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:10,347 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:32:10,348 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:32:10,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:32:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:32:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-10-16 12:32:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:32:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-10-16 12:32:10,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-10-16 12:32:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:10,351 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-10-16 12:32:10,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-10-16 12:32:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:10,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:10,352 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:10,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:10,554 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-10-16 12:32:10,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:10,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934128408] [2020-10-16 12:32:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:10,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934128408] [2020-10-16 12:32:10,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711304545] [2020-10-16 12:32:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:10,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:32:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:10,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:10,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2049865731] [2020-10-16 12:32:10,890 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:10,893 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:10,899 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:10,899 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:10,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:10,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:10,942 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:32:10,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:10,943 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-10-16 12:32:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:11,785 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-10-16 12:32:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:11,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:11,787 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:11,787 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:11,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:32:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-10-16 12:32:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:32:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-10-16 12:32:11,791 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-10-16 12:32:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:11,791 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-10-16 12:32:11,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-10-16 12:32:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:11,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:11,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:11,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:11,993 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-10-16 12:32:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:11,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577206136] [2020-10-16 12:32:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:12,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577206136] [2020-10-16 12:32:12,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213273609] [2020-10-16 12:32:12,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:12,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:12,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [23494328] [2020-10-16 12:32:12,321 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:12,323 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:12,328 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:12,328 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:12,336 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:12,336 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:12,363 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:32:12,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:12,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:12,364 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-10-16 12:32:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:13,292 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-10-16 12:32:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:13,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:13,294 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:32:13,294 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 12:32:13,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:32:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 12:32:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-10-16 12:32:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:32:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-10-16 12:32:13,297 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-10-16 12:32:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-10-16 12:32:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-10-16 12:32:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:13,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:13,299 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:13,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 12:32:13,507 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-10-16 12:32:13,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:13,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848690439] [2020-10-16 12:32:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848690439] [2020-10-16 12:32:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071293334] [2020-10-16 12:32:13,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:13,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:13,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:13,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109008869] [2020-10-16 12:32:13,819 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:13,822 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:13,828 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:13,828 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:13,832 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:13,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:13,863 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:32:13,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:13,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:13,864 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-10-16 12:32:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:14,873 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-10-16 12:32:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:14,874 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:14,875 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:32:14,875 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:32:14,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:32:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:32:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-16 12:32:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 12:32:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-10-16 12:32:14,879 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-10-16 12:32:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:14,879 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-10-16 12:32:14,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-10-16 12:32:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:14,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:14,880 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:15,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:15,089 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-10-16 12:32:15,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:15,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937861628] [2020-10-16 12:32:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:15,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937861628] [2020-10-16 12:32:15,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677738654] [2020-10-16 12:32:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:15,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:32:15,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:15,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:15,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957975580] [2020-10-16 12:32:15,426 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:15,428 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:15,433 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:15,434 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:15,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:15,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:15,473 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:32:15,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:15,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:15,474 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-10-16 12:32:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:16,584 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-10-16 12:32:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:16,585 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:16,586 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:16,586 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:32:16,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:32:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:32:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-10-16 12:32:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:32:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-10-16 12:32:16,589 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-10-16 12:32:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:16,590 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-10-16 12:32:16,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-10-16 12:32:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:16,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:16,591 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:16,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 12:32:16,797 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:16,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-10-16 12:32:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:16,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157072586] [2020-10-16 12:32:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:17,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157072586] [2020-10-16 12:32:17,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065082908] [2020-10-16 12:32:17,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:17,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:17,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:17,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:17,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84509697] [2020-10-16 12:32:17,154 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:17,157 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:17,164 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:17,164 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:17,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:17,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:17,212 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:32:17,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:17,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:17,214 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-10-16 12:32:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:18,419 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-10-16 12:32:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:18,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:18,421 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:18,421 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:32:18,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:32:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:32:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-16 12:32:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:32:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-10-16 12:32:18,425 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-10-16 12:32:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:18,425 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-10-16 12:32:18,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-10-16 12:32:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:18,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:18,426 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:18,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 12:32:18,636 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-10-16 12:32:18,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:18,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773473723] [2020-10-16 12:32:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773473723] [2020-10-16 12:32:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374192759] [2020-10-16 12:32:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:18,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:32:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:18,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:18,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:18,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1529633576] [2020-10-16 12:32:18,950 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:18,953 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:18,959 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:18,960 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:18,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:18,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:18,992 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:32:18,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:18,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:18,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:18,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:18,993 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-10-16 12:32:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:20,235 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-10-16 12:32:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 12:32:20,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:20,237 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:20,238 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:32:20,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:32:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:32:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-16 12:32:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:32:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 12:32:20,240 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-10-16 12:32:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:20,240 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 12:32:20,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 12:32:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:20,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:20,241 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:20,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:20,450 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-10-16 12:32:20,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:20,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317689248] [2020-10-16 12:32:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:20,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317689248] [2020-10-16 12:32:20,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114283475] [2020-10-16 12:32:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:20,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:20,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:20,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:20,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:20,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1170076153] [2020-10-16 12:32:20,856 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:20,859 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:20,867 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-10-16 12:32:20,867 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:20,877 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:20,877 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:20,910 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:20,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:20,929 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:20,930 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:20,935 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:20,935 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:20,943 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:32:20,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:20,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:20,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:20,945 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-10-16 12:32:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:21,795 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-10-16 12:32:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:21,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:21,797 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:32:21,797 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:32:21,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:32:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:32:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 12:32:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:32:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-16 12:32:21,801 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-10-16 12:32:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:21,801 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-16 12:32:21,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-16 12:32:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:21,803 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:22,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:22,014 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-10-16 12:32:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:22,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582060902] [2020-10-16 12:32:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:22,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582060902] [2020-10-16 12:32:22,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659151569] [2020-10-16 12:32:22,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:22,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:22,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:22,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390817214] [2020-10-16 12:32:22,402 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:22,404 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:22,410 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:22,410 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:22,422 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:22,422 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:22,458 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:32:22,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:22,460 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-10-16 12:32:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:23,213 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-10-16 12:32:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:23,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:23,214 INFO L225 Difference]: With dead ends: 142 [2020-10-16 12:32:23,214 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 12:32:23,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:32:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 12:32:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-10-16 12:32:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:32:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-10-16 12:32:23,217 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-10-16 12:32:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:23,217 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-10-16 12:32:23,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-10-16 12:32:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:23,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:23,218 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:23,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:23,419 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-10-16 12:32:23,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:23,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195261035] [2020-10-16 12:32:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195261035] [2020-10-16 12:32:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377586472] [2020-10-16 12:32:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:23,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:23,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:23,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:23,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [180193753] [2020-10-16 12:32:23,799 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:23,801 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:23,808 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:23,808 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:23,812 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:23,812 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:23,845 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:32:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:23,847 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-10-16 12:32:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:24,673 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-10-16 12:32:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:24,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:24,682 INFO L225 Difference]: With dead ends: 139 [2020-10-16 12:32:24,682 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 12:32:24,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:32:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 12:32:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-10-16 12:32:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:32:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-10-16 12:32:24,684 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-10-16 12:32:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:24,684 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-10-16 12:32:24,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-10-16 12:32:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:24,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:24,685 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:24,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 12:32:24,886 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-10-16 12:32:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:24,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482856455] [2020-10-16 12:32:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:25,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482856455] [2020-10-16 12:32:25,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744367670] [2020-10-16 12:32:25,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:25,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:25,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:25,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [6741230] [2020-10-16 12:32:25,261 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:25,263 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:25,270 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:25,270 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:25,281 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:25,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:25,310 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:32:25,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:25,311 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-10-16 12:32:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:26,211 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-10-16 12:32:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:26,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:26,213 INFO L225 Difference]: With dead ends: 137 [2020-10-16 12:32:26,213 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 12:32:26,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:32:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 12:32:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-10-16 12:32:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 12:32:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-10-16 12:32:26,217 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-10-16 12:32:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:26,217 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-10-16 12:32:26,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-10-16 12:32:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:26,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:26,218 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:26,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:26,419 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-10-16 12:32:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131725799] [2020-10-16 12:32:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131725799] [2020-10-16 12:32:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769458254] [2020-10-16 12:32:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:26,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:26,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:26,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1192668970] [2020-10-16 12:32:26,769 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:26,771 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:26,778 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:26,778 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:26,801 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:26,801 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:26,836 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:32:26,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:26,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:26,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:26,837 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-10-16 12:32:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:27,814 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-10-16 12:32:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:27,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:27,815 INFO L225 Difference]: With dead ends: 135 [2020-10-16 12:32:27,815 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 12:32:27,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 12:32:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 12:32:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-10-16 12:32:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:32:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-10-16 12:32:27,819 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-10-16 12:32:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:27,819 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-10-16 12:32:27,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-10-16 12:32:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:27,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:27,820 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:28,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 12:32:28,029 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-10-16 12:32:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:28,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639827346] [2020-10-16 12:32:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639827346] [2020-10-16 12:32:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379522476] [2020-10-16 12:32:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:28,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:28,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:28,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:28,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56599766] [2020-10-16 12:32:28,386 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:28,388 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:28,394 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:28,394 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:28,416 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:28,416 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:28,443 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:32:28,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:28,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:28,445 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-10-16 12:32:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:29,509 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-10-16 12:32:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:29,510 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:29,511 INFO L225 Difference]: With dead ends: 133 [2020-10-16 12:32:29,511 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 12:32:29,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:32:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 12:32:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-10-16 12:32:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:32:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-10-16 12:32:29,514 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-10-16 12:32:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:29,514 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-10-16 12:32:29,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-10-16 12:32:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:29,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:29,515 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:29,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:29,718 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-10-16 12:32:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:29,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59472528] [2020-10-16 12:32:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59472528] [2020-10-16 12:32:29,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590070155] [2020-10-16 12:32:29,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:30,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:30,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:30,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1790917203] [2020-10-16 12:32:30,054 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:30,056 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:30,061 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:30,061 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:30,065 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:30,066 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:30,101 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:32:30,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:30,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:30,102 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-10-16 12:32:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:31,253 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-10-16 12:32:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:31,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:31,255 INFO L225 Difference]: With dead ends: 131 [2020-10-16 12:32:31,255 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 12:32:31,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:32:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 12:32:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 12:32:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 12:32:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-10-16 12:32:31,258 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-10-16 12:32:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:31,258 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-10-16 12:32:31,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-10-16 12:32:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:31,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:31,259 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:31,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:31,465 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-10-16 12:32:31,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:31,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136534651] [2020-10-16 12:32:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:31,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136534651] [2020-10-16 12:32:31,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773187638] [2020-10-16 12:32:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:31,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:31,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:31,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [521240012] [2020-10-16 12:32:31,862 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:31,869 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:31,879 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:31,879 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:31,886 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:31,886 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:31,926 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:32:31,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:31,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:31,927 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-10-16 12:32:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:33,144 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-10-16 12:32:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:32:33,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:33,146 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:32:33,146 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:32:33,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 12:32:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:32:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-10-16 12:32:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 12:32:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-10-16 12:32:33,149 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-10-16 12:32:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:33,150 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-10-16 12:32:33,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-10-16 12:32:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:33,151 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:33,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 12:32:33,354 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-10-16 12:32:33,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:33,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738418274] [2020-10-16 12:32:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:33,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738418274] [2020-10-16 12:32:33,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827826902] [2020-10-16 12:32:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:33,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:33,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:33,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [47548620] [2020-10-16 12:32:33,683 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:33,686 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:33,692 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:33,693 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:33,703 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:33,703 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:33,764 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:32:33,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:33,765 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-10-16 12:32:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:35,072 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 12:32:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:32:35,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:35,074 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:32:35,074 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:32:35,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 12:32:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:32:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-10-16 12:32:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 12:32:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-10-16 12:32:35,077 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-10-16 12:32:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:35,077 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-10-16 12:32:35,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-10-16 12:32:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:35,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:35,078 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:35,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-16 12:32:35,279 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-10-16 12:32:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:35,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545918965] [2020-10-16 12:32:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:35,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545918965] [2020-10-16 12:32:35,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621479833] [2020-10-16 12:32:35,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:35,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:35,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:35,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:35,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:35,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077095708] [2020-10-16 12:32:35,631 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:35,634 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:35,641 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:35,642 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:35,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:35,657 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:35,686 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:32:35,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:35,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:35,687 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-10-16 12:32:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:37,356 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-16 12:32:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 12:32:37,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:37,358 INFO L225 Difference]: With dead ends: 130 [2020-10-16 12:32:37,359 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 12:32:37,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:32:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 12:32:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-10-16 12:32:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:32:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 12:32:37,361 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-10-16 12:32:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:37,362 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 12:32:37,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 12:32:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:37,362 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:37,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:37,571 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:37,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-10-16 12:32:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:37,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904354171] [2020-10-16 12:32:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904354171] [2020-10-16 12:32:37,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820844624] [2020-10-16 12:32:37,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:37,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:37,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:38,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:38,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387439149] [2020-10-16 12:32:38,009 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:38,011 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:38,017 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-10-16 12:32:38,017 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:38,025 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:38,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:38,065 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:32:38,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:38,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:38,066 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-10-16 12:32:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:38,783 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-10-16 12:32:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:38,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:38,784 INFO L225 Difference]: With dead ends: 126 [2020-10-16 12:32:38,785 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 12:32:38,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:32:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 12:32:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-10-16 12:32:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:32:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 12:32:38,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-10-16 12:32:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:38,788 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 12:32:38,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 12:32:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:38,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:38,788 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:38,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 12:32:38,993 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-10-16 12:32:38,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:38,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605183813] [2020-10-16 12:32:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:39,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605183813] [2020-10-16 12:32:39,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590224252] [2020-10-16 12:32:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:39,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:39,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:39,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [19989339] [2020-10-16 12:32:39,438 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:39,442 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:39,449 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:39,449 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:39,460 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:39,460 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:39,486 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:32:39,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:39,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:39,488 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-10-16 12:32:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:40,277 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-10-16 12:32:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:40,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:40,279 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:32:40,279 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:32:40,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:32:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:32:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 12:32:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:32:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-10-16 12:32:40,283 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-10-16 12:32:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:40,283 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-10-16 12:32:40,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-10-16 12:32:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:40,284 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:40,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 12:32:40,485 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-10-16 12:32:40,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:40,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079676707] [2020-10-16 12:32:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079676707] [2020-10-16 12:32:40,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403116298] [2020-10-16 12:32:40,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:40,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:40,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:40,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:40,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [581879473] [2020-10-16 12:32:40,904 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:40,907 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:40,914 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:40,915 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:40,925 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:40,926 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:40,965 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:32:40,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:40,966 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-10-16 12:32:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:41,864 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-10-16 12:32:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:41,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:41,865 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:32:41,865 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:32:41,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:32:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:32:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 12:32:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:32:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-10-16 12:32:41,868 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-10-16 12:32:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:41,868 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-10-16 12:32:41,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-10-16 12:32:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:41,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:41,869 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:42,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 12:32:42,078 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-10-16 12:32:42,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:42,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839101908] [2020-10-16 12:32:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:42,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839101908] [2020-10-16 12:32:42,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091555902] [2020-10-16 12:32:42,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:42,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:42,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:42,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [557266625] [2020-10-16 12:32:42,477 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:42,480 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:42,488 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:42,488 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:42,498 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:42,499 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:42,524 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:32:42,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:42,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:42,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:42,525 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-10-16 12:32:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:43,643 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-10-16 12:32:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:43,644 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:43,645 INFO L225 Difference]: With dead ends: 119 [2020-10-16 12:32:43,645 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 12:32:43,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:32:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 12:32:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 12:32:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 12:32:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-10-16 12:32:43,656 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-10-16 12:32:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:43,656 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-10-16 12:32:43,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-10-16 12:32:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:43,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:43,658 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:43,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:43,858 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-10-16 12:32:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833245075] [2020-10-16 12:32:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:44,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833245075] [2020-10-16 12:32:44,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592464219] [2020-10-16 12:32:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:44,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:44,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:44,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1871904993] [2020-10-16 12:32:44,256 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:44,258 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:44,264 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:44,264 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:44,265 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:44,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:44,302 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:32:44,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:44,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:44,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:44,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:44,303 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-10-16 12:32:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:45,362 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-10-16 12:32:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:45,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:45,364 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:32:45,364 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:32:45,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:32:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:32:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-10-16 12:32:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:32:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-10-16 12:32:45,368 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-10-16 12:32:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:45,368 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-10-16 12:32:45,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-10-16 12:32:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:45,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:45,369 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:45,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 12:32:45,577 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-10-16 12:32:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197629773] [2020-10-16 12:32:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197629773] [2020-10-16 12:32:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456080107] [2020-10-16 12:32:45,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:45,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:45,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:45,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:45,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:45,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:45,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:45,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [625172672] [2020-10-16 12:32:45,952 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:45,954 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:45,960 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:45,960 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:45,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:45,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:45,998 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:32:45,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:45,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:45,999 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-10-16 12:32:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:47,189 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-10-16 12:32:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:47,190 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:47,190 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:32:47,191 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:32:47,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:32:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:32:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-16 12:32:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:32:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-10-16 12:32:47,193 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-10-16 12:32:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:47,194 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-10-16 12:32:47,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-10-16 12:32:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:47,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:47,194 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:47,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 12:32:47,403 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-10-16 12:32:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:47,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532858777] [2020-10-16 12:32:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:47,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532858777] [2020-10-16 12:32:47,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097559953] [2020-10-16 12:32:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:47,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:47,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:47,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [217443279] [2020-10-16 12:32:47,770 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:47,773 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:47,780 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:47,780 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:47,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:47,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:47,826 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:32:47,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:47,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:47,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:47,827 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-10-16 12:32:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:49,093 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-10-16 12:32:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:49,094 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:49,094 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:32:49,094 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:32:49,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:32:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:32:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-16 12:32:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 12:32:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-10-16 12:32:49,097 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-10-16 12:32:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:49,097 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-10-16 12:32:49,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-10-16 12:32:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:49,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:49,098 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:49,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 12:32:49,299 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-10-16 12:32:49,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:49,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486035126] [2020-10-16 12:32:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:49,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486035126] [2020-10-16 12:32:49,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466482078] [2020-10-16 12:32:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:49,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:49,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:49,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1570384160] [2020-10-16 12:32:49,679 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:49,681 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:49,687 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:49,687 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:49,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:49,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:49,725 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:32:49,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:49,727 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-10-16 12:32:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:51,091 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-10-16 12:32:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:32:51,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:51,092 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:51,092 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:51,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 12:32:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 12:32:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 12:32:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-10-16 12:32:51,096 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-10-16 12:32:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:51,096 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-10-16 12:32:51,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-10-16 12:32:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:51,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:51,097 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:51,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:51,304 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-10-16 12:32:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:51,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151078164] [2020-10-16 12:32:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:51,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151078164] [2020-10-16 12:32:51,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710702448] [2020-10-16 12:32:51,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:51,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:51,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:51,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:51,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1149021220] [2020-10-16 12:32:51,686 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:51,688 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:51,696 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:51,697 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:51,708 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:51,708 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:51,736 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:32:51,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:51,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:51,737 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-10-16 12:32:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:53,165 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-10-16 12:32:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:32:53,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:53,167 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:53,167 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:53,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-10-16 12:32:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-16 12:32:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 12:32:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-10-16 12:32:53,170 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-10-16 12:32:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:53,170 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-10-16 12:32:53,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-10-16 12:32:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:53,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:53,171 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:53,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:53,371 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:53,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-10-16 12:32:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:53,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642983686] [2020-10-16 12:32:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:53,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642983686] [2020-10-16 12:32:53,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180161086] [2020-10-16 12:32:53,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:53,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:53,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1755385192] [2020-10-16 12:32:53,742 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:53,744 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:53,750 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:53,751 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:53,751 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:53,752 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:53,795 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-10-16 12:32:53,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:53,796 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-10-16 12:32:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:55,243 INFO L93 Difference]: Finished difference Result 111 states and 283 transitions. [2020-10-16 12:32:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 12:32:55,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:55,244 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:55,244 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:32:55,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1332, Invalid=2958, Unknown=0, NotChecked=0, Total=4290 [2020-10-16 12:32:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:32:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-10-16 12:32:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:32:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-16 12:32:55,247 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2020-10-16 12:32:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:55,247 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-16 12:32:55,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-16 12:32:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:32:55,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:55,248 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:55,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:55,454 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 110 times [2020-10-16 12:32:55,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:55,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318462315] [2020-10-16 12:32:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318462315] [2020-10-16 12:32:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710306146] [2020-10-16 12:32:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:55,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:55,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:55,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:32:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:55,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:55,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:32:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876441012] [2020-10-16 12:32:55,921 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:55,923 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:55,930 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-10-16 12:32:55,930 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:55,931 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:55,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:55,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:55,965 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:55,996 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:55,996 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:56,007 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:56,008 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:56,014 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39943#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:32:56,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:32:56,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:56,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:32:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:32:56,015 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 26 states. [2020-10-16 12:32:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:56,812 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2020-10-16 12:32:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:56,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:32:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:56,813 INFO L225 Difference]: With dead ends: 108 [2020-10-16 12:32:56,813 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 12:32:56,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1664, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:32:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 12:32:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-16 12:32:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:32:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-16 12:32:56,815 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 29 [2020-10-16 12:32:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:56,816 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-16 12:32:56,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:32:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-16 12:32:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:32:56,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:56,816 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:57,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 12:32:57,017 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 111 times [2020-10-16 12:32:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:57,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730179052] [2020-10-16 12:32:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:57,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730179052] [2020-10-16 12:32:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777368244] [2020-10-16 12:32:57,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:57,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 12:32:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:57,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:32:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:57,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:57,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:32:57,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122975153] [2020-10-16 12:32:57,519 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:57,520 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:57,527 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:32:57,527 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:57,530 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:57,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:57,567 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40363#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:32:57,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:32:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:32:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:32:57,568 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 26 states. [2020-10-16 12:32:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:58,439 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2020-10-16 12:32:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:58,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:32:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:58,440 INFO L225 Difference]: With dead ends: 152 [2020-10-16 12:32:58,440 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 12:32:58,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=749, Invalid=2007, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:32:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 12:32:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2020-10-16 12:32:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 12:32:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2020-10-16 12:32:58,443 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 29 [2020-10-16 12:32:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:58,443 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2020-10-16 12:32:58,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:32:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2020-10-16 12:32:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:32:58,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:58,444 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:58,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 12:32:58,645 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 112 times [2020-10-16 12:32:58,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:58,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599137912] [2020-10-16 12:32:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:59,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599137912] [2020-10-16 12:32:59,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472461064] [2020-10-16 12:32:59,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:59,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:32:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:59,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:59,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:32:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1815581093] [2020-10-16 12:32:59,091 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:59,093 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:59,101 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:32:59,101 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:59,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:59,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:59,148 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40839#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:32:59,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:32:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:32:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:32:59,149 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand 26 states. [2020-10-16 12:33:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:00,223 INFO L93 Difference]: Finished difference Result 149 states and 338 transitions. [2020-10-16 12:33:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:33:00,224 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:00,225 INFO L225 Difference]: With dead ends: 149 [2020-10-16 12:33:00,225 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 12:33:00,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2194, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 12:33:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 12:33:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 82. [2020-10-16 12:33:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:33:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 204 transitions. [2020-10-16 12:33:00,228 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 204 transitions. Word has length 29 [2020-10-16 12:33:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:00,228 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 204 transitions. [2020-10-16 12:33:00,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 204 transitions. [2020-10-16 12:33:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:00,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:00,229 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:00,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 12:33:00,430 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 113 times [2020-10-16 12:33:00,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:00,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198362018] [2020-10-16 12:33:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198362018] [2020-10-16 12:33:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169124664] [2020-10-16 12:33:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:00,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:33:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:00,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:00,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:00,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [408467091] [2020-10-16 12:33:00,863 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:00,864 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:00,872 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:00,872 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:00,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:00,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:00,921 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41320#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:33:00,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:00,922 INFO L87 Difference]: Start difference. First operand 82 states and 204 transitions. Second operand 26 states. [2020-10-16 12:33:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:01,960 INFO L93 Difference]: Finished difference Result 147 states and 336 transitions. [2020-10-16 12:33:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:33:01,961 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:01,961 INFO L225 Difference]: With dead ends: 147 [2020-10-16 12:33:01,961 INFO L226 Difference]: Without dead ends: 141 [2020-10-16 12:33:01,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:33:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-16 12:33:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2020-10-16 12:33:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:33:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 210 transitions. [2020-10-16 12:33:01,965 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 210 transitions. Word has length 29 [2020-10-16 12:33:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:01,965 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 210 transitions. [2020-10-16 12:33:01,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 210 transitions. [2020-10-16 12:33:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:01,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:01,966 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:02,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 12:33:02,174 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 114 times [2020-10-16 12:33:02,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:02,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434219171] [2020-10-16 12:33:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434219171] [2020-10-16 12:33:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091994022] [2020-10-16 12:33:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:02,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 12:33:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:02,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:02,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424956549] [2020-10-16 12:33:02,604 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:02,606 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:02,612 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:02,612 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:02,621 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:02,622 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:02,657 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:33:02,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:02,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:02,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:02,658 INFO L87 Difference]: Start difference. First operand 84 states and 210 transitions. Second operand 26 states. [2020-10-16 12:33:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:03,797 INFO L93 Difference]: Finished difference Result 145 states and 334 transitions. [2020-10-16 12:33:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:33:03,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:03,798 INFO L225 Difference]: With dead ends: 145 [2020-10-16 12:33:03,798 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 12:33:03,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:33:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 12:33:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-10-16 12:33:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 12:33:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 216 transitions. [2020-10-16 12:33:03,802 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 216 transitions. Word has length 29 [2020-10-16 12:33:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:03,802 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 216 transitions. [2020-10-16 12:33:03,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 216 transitions. [2020-10-16 12:33:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:03,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:03,803 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:04,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 12:33:04,003 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 115 times [2020-10-16 12:33:04,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:04,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465882253] [2020-10-16 12:33:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465882253] [2020-10-16 12:33:04,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661459722] [2020-10-16 12:33:04,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:04,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:04,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [682427677] [2020-10-16 12:33:04,425 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:04,427 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:04,436 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:04,436 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:04,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:04,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:04,485 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42300#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:33:04,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:04,486 INFO L87 Difference]: Start difference. First operand 86 states and 216 transitions. Second operand 26 states. [2020-10-16 12:33:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:05,743 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 12:33:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:33:05,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:05,744 INFO L225 Difference]: With dead ends: 143 [2020-10-16 12:33:05,744 INFO L226 Difference]: Without dead ends: 137 [2020-10-16 12:33:05,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 12:33:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-16 12:33:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-10-16 12:33:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 12:33:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 222 transitions. [2020-10-16 12:33:05,747 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 222 transitions. Word has length 29 [2020-10-16 12:33:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:05,748 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 222 transitions. [2020-10-16 12:33:05,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 222 transitions. [2020-10-16 12:33:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:05,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:05,748 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:05,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:05,951 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 116 times [2020-10-16 12:33:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:05,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160711009] [2020-10-16 12:33:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:06,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160711009] [2020-10-16 12:33:06,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061702855] [2020-10-16 12:33:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:06,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:33:06,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:06,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:06,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:06,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879155641] [2020-10-16 12:33:06,352 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:06,354 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:06,360 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:06,360 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:06,364 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:06,364 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:06,408 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42799#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:33:06,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:06,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:06,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:06,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:06,409 INFO L87 Difference]: Start difference. First operand 88 states and 222 transitions. Second operand 26 states. [2020-10-16 12:33:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:07,744 INFO L93 Difference]: Finished difference Result 141 states and 330 transitions. [2020-10-16 12:33:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:33:07,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:07,745 INFO L225 Difference]: With dead ends: 141 [2020-10-16 12:33:07,745 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 12:33:07,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1044, Invalid=2862, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 12:33:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 12:33:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2020-10-16 12:33:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 12:33:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2020-10-16 12:33:07,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 29 [2020-10-16 12:33:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:07,747 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2020-10-16 12:33:07,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2020-10-16 12:33:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:07,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:07,748 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:07,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 12:33:07,949 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 117 times [2020-10-16 12:33:07,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:07,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052973420] [2020-10-16 12:33:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:08,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052973420] [2020-10-16 12:33:08,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472879035] [2020-10-16 12:33:08,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:08,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 12:33:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:08,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:08,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:08,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1910352361] [2020-10-16 12:33:08,359 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:08,361 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:08,367 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:08,367 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:08,369 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:08,370 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:08,405 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43304#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:33:08,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:08,406 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand 26 states. [2020-10-16 12:33:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:09,803 INFO L93 Difference]: Finished difference Result 139 states and 328 transitions. [2020-10-16 12:33:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:33:09,803 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:09,804 INFO L225 Difference]: With dead ends: 139 [2020-10-16 12:33:09,804 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 12:33:09,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1151, Invalid=3009, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:33:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 12:33:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-10-16 12:33:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 12:33:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 234 transitions. [2020-10-16 12:33:09,806 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 234 transitions. Word has length 29 [2020-10-16 12:33:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:09,807 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 234 transitions. [2020-10-16 12:33:09,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 234 transitions. [2020-10-16 12:33:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:09,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:09,807 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:10,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:10,008 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 118 times [2020-10-16 12:33:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:10,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33154018] [2020-10-16 12:33:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:10,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33154018] [2020-10-16 12:33:10,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894688325] [2020-10-16 12:33:10,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:10,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:33:10,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:10,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:10,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:10,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954661197] [2020-10-16 12:33:10,416 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:10,419 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:10,426 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:10,426 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:10,431 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:10,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:10,469 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43815#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:33:10,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:10,469 INFO L87 Difference]: Start difference. First operand 92 states and 234 transitions. Second operand 26 states. [2020-10-16 12:33:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:11,948 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2020-10-16 12:33:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 12:33:11,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:11,949 INFO L225 Difference]: With dead ends: 137 [2020-10-16 12:33:11,950 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 12:33:11,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1274, Invalid=3148, Unknown=0, NotChecked=0, Total=4422 [2020-10-16 12:33:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 12:33:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-10-16 12:33:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 12:33:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 240 transitions. [2020-10-16 12:33:11,953 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 240 transitions. Word has length 29 [2020-10-16 12:33:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:11,953 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 240 transitions. [2020-10-16 12:33:11,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 240 transitions. [2020-10-16 12:33:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:11,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:11,953 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:12,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:12,154 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 119 times [2020-10-16 12:33:12,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:12,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078301997] [2020-10-16 12:33:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:12,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078301997] [2020-10-16 12:33:12,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523633790] [2020-10-16 12:33:12,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:12,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:33:12,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:12,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:12,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:12,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1937006698] [2020-10-16 12:33:12,557 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:12,559 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:12,566 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:12,566 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:12,575 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:12,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:12,606 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:33:12,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:12,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:12,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:12,607 INFO L87 Difference]: Start difference. First operand 94 states and 240 transitions. Second operand 26 states. [2020-10-16 12:33:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:14,191 INFO L93 Difference]: Finished difference Result 137 states and 329 transitions. [2020-10-16 12:33:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 12:33:14,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:14,192 INFO L225 Difference]: With dead ends: 137 [2020-10-16 12:33:14,192 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 12:33:14,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1413, Invalid=3279, Unknown=0, NotChecked=0, Total=4692 [2020-10-16 12:33:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 12:33:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-10-16 12:33:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 12:33:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 248 transitions. [2020-10-16 12:33:14,196 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 248 transitions. Word has length 29 [2020-10-16 12:33:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:14,196 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 248 transitions. [2020-10-16 12:33:14,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 248 transitions. [2020-10-16 12:33:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:33:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:14,197 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:14,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2020-10-16 12:33:14,397 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 120 times [2020-10-16 12:33:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:14,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282590304] [2020-10-16 12:33:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282590304] [2020-10-16 12:33:14,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724975261] [2020-10-16 12:33:14,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:14,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 12:33:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 12:33:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:14,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:14,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 12:33:14,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1316451743] [2020-10-16 12:33:14,784 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:14,786 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:14,794 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-16 12:33:14,795 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:14,806 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:14,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:14,844 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44857#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:33:14,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 12:33:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 12:33:14,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:33:14,845 INFO L87 Difference]: Start difference. First operand 96 states and 248 transitions. Second operand 26 states. [2020-10-16 12:33:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:16,512 INFO L93 Difference]: Finished difference Result 138 states and 339 transitions. [2020-10-16 12:33:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 12:33:16,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-16 12:33:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:16,514 INFO L225 Difference]: With dead ends: 138 [2020-10-16 12:33:16,514 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 12:33:16,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1566, Invalid=3404, Unknown=0, NotChecked=0, Total=4970 [2020-10-16 12:33:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 12:33:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2020-10-16 12:33:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:33:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 12:33:16,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2020-10-16 12:33:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:16,518 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 12:33:16,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 12:33:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 12:33:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:16,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:16,518 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:16,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:16,725 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 121 times [2020-10-16 12:33:16,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:16,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459795179] [2020-10-16 12:33:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:17,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459795179] [2020-10-16 12:33:17,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490293853] [2020-10-16 12:33:17,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:17,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:17,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2039957635] [2020-10-16 12:33:17,239 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:17,241 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:17,248 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-10-16 12:33:17,248 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:17,257 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:17,258 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:17,291 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:33:17,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:17,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:17,292 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 27 states. [2020-10-16 12:33:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:18,134 INFO L93 Difference]: Finished difference Result 134 states and 306 transitions. [2020-10-16 12:33:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:33:18,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:18,135 INFO L225 Difference]: With dead ends: 134 [2020-10-16 12:33:18,136 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 12:33:18,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:33:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 12:33:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2020-10-16 12:33:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:33:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 200 transitions. [2020-10-16 12:33:18,139 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 200 transitions. Word has length 30 [2020-10-16 12:33:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:18,139 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 200 transitions. [2020-10-16 12:33:18,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 200 transitions. [2020-10-16 12:33:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:18,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:18,140 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:18,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:18,350 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 122 times [2020-10-16 12:33:18,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:18,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936175004] [2020-10-16 12:33:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936175004] [2020-10-16 12:33:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688557701] [2020-10-16 12:33:18,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:18,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:33:18,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:18,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:18,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:18,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704108548] [2020-10-16 12:33:18,857 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:18,859 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:18,866 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:18,866 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:18,876 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:18,876 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:18,909 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45807#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:33:18,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:18,910 INFO L87 Difference]: Start difference. First operand 81 states and 200 transitions. Second operand 27 states. [2020-10-16 12:33:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:19,851 INFO L93 Difference]: Finished difference Result 131 states and 302 transitions. [2020-10-16 12:33:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:33:19,851 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:19,852 INFO L225 Difference]: With dead ends: 131 [2020-10-16 12:33:19,852 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 12:33:19,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:33:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 12:33:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-10-16 12:33:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 12:33:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2020-10-16 12:33:19,855 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 30 [2020-10-16 12:33:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:19,855 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2020-10-16 12:33:19,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2020-10-16 12:33:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:19,856 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:20,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 12:33:20,057 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 123 times [2020-10-16 12:33:20,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:20,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791349690] [2020-10-16 12:33:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791349690] [2020-10-16 12:33:20,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138337002] [2020-10-16 12:33:20,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:20,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 12:33:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:20,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:20,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:20,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690456505] [2020-10-16 12:33:20,551 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:20,552 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:20,559 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:20,559 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:20,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:20,568 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:20,605 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46272#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:33:20,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:20,606 INFO L87 Difference]: Start difference. First operand 83 states and 206 transitions. Second operand 27 states. [2020-10-16 12:33:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:21,647 INFO L93 Difference]: Finished difference Result 129 states and 300 transitions. [2020-10-16 12:33:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:33:21,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:21,648 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:33:21,648 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:33:21,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:33:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:33:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-10-16 12:33:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:33:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 212 transitions. [2020-10-16 12:33:21,651 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 212 transitions. Word has length 30 [2020-10-16 12:33:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:21,652 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 212 transitions. [2020-10-16 12:33:21,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 212 transitions. [2020-10-16 12:33:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:21,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:21,652 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:21,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:21,861 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 124 times [2020-10-16 12:33:21,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:21,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742341693] [2020-10-16 12:33:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742341693] [2020-10-16 12:33:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935352797] [2020-10-16 12:33:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:22,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:33:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:22,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:22,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288105253] [2020-10-16 12:33:22,331 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:22,332 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:22,350 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:22,350 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:22,360 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:22,361 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:22,393 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46743#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:33:22,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:22,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:22,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:22,394 INFO L87 Difference]: Start difference. First operand 85 states and 212 transitions. Second operand 27 states. [2020-10-16 12:33:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:23,527 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 12:33:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:33:23,528 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:23,528 INFO L225 Difference]: With dead ends: 127 [2020-10-16 12:33:23,529 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 12:33:23,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:33:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 12:33:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-10-16 12:33:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:33:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 218 transitions. [2020-10-16 12:33:23,532 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 218 transitions. Word has length 30 [2020-10-16 12:33:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:23,532 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 218 transitions. [2020-10-16 12:33:23,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 218 transitions. [2020-10-16 12:33:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:23,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:23,534 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:23,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 12:33:23,734 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 125 times [2020-10-16 12:33:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:23,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880201008] [2020-10-16 12:33:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:24,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880201008] [2020-10-16 12:33:24,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885667535] [2020-10-16 12:33:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:24,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:33:24,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:24,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:24,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:24,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [854001002] [2020-10-16 12:33:24,200 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:24,202 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:24,208 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:24,208 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:24,215 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:24,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:24,249 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47220#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:33:24,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:24,250 INFO L87 Difference]: Start difference. First operand 87 states and 218 transitions. Second operand 27 states. [2020-10-16 12:33:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:25,486 INFO L93 Difference]: Finished difference Result 125 states and 296 transitions. [2020-10-16 12:33:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:33:25,487 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:25,487 INFO L225 Difference]: With dead ends: 125 [2020-10-16 12:33:25,487 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 12:33:25,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=891, Invalid=2649, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:33:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 12:33:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-10-16 12:33:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 12:33:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2020-10-16 12:33:25,489 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 30 [2020-10-16 12:33:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:25,490 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2020-10-16 12:33:25,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2020-10-16 12:33:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:25,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:25,491 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:25,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:25,695 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:25,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 126 times [2020-10-16 12:33:25,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:25,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067228533] [2020-10-16 12:33:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067228533] [2020-10-16 12:33:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647898785] [2020-10-16 12:33:26,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:26,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 12:33:26,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:26,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:26,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:26,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2004239137] [2020-10-16 12:33:26,161 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:26,162 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:26,168 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:26,169 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:26,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:26,180 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:26,212 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47703#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:33:26,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:26,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:26,214 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand 27 states. [2020-10-16 12:33:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:27,553 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2020-10-16 12:33:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:33:27,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:27,555 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:33:27,555 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:33:27,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2815, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 12:33:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:33:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 12:33:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 12:33:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2020-10-16 12:33:27,558 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 30 [2020-10-16 12:33:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:27,559 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2020-10-16 12:33:27,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2020-10-16 12:33:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:27,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:27,559 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:27,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 12:33:27,766 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 127 times [2020-10-16 12:33:27,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:27,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106436798] [2020-10-16 12:33:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:28,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106436798] [2020-10-16 12:33:28,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089180579] [2020-10-16 12:33:28,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:28,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:28,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:28,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [469639581] [2020-10-16 12:33:28,205 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:28,207 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:28,214 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:28,215 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:28,225 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:28,226 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:28,260 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48192#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:33:28,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:28,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:28,261 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand 27 states. [2020-10-16 12:33:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:29,693 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2020-10-16 12:33:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:33:29,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:29,694 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:33:29,695 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:33:29,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2020-10-16 12:33:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:33:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-10-16 12:33:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 12:33:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 236 transitions. [2020-10-16 12:33:29,698 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 236 transitions. Word has length 30 [2020-10-16 12:33:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 236 transitions. [2020-10-16 12:33:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 236 transitions. [2020-10-16 12:33:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:29,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:29,699 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:29,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:29,900 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:29,901 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 128 times [2020-10-16 12:33:29,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:29,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821915784] [2020-10-16 12:33:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:30,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821915784] [2020-10-16 12:33:30,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583199864] [2020-10-16 12:33:30,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:30,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:33:30,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:30,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:30,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:30,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1378394335] [2020-10-16 12:33:30,332 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:30,334 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:30,340 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:30,341 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:30,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:30,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:30,396 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48687#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:33:30,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:30,397 INFO L87 Difference]: Start difference. First operand 93 states and 236 transitions. Second operand 27 states. [2020-10-16 12:33:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:31,932 INFO L93 Difference]: Finished difference Result 119 states and 290 transitions. [2020-10-16 12:33:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:33:31,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:31,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:31,934 INFO L225 Difference]: With dead ends: 119 [2020-10-16 12:33:31,934 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 12:33:31,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1167, Invalid=3123, Unknown=0, NotChecked=0, Total=4290 [2020-10-16 12:33:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 12:33:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-10-16 12:33:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 12:33:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 242 transitions. [2020-10-16 12:33:31,937 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 242 transitions. Word has length 30 [2020-10-16 12:33:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:31,937 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 242 transitions. [2020-10-16 12:33:31,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 242 transitions. [2020-10-16 12:33:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:31,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:31,937 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:32,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 12:33:32,139 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 129 times [2020-10-16 12:33:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:32,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224785447] [2020-10-16 12:33:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224785447] [2020-10-16 12:33:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980916136] [2020-10-16 12:33:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:32,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 12:33:32,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:32,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:32,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:32,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:32,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1397473394] [2020-10-16 12:33:32,588 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:32,589 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:32,596 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:32,596 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:32,604 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:32,604 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:32,641 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49188#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:33:32,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:32,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:32,642 INFO L87 Difference]: Start difference. First operand 95 states and 242 transitions. Second operand 27 states. [2020-10-16 12:33:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:34,300 INFO L93 Difference]: Finished difference Result 117 states and 288 transitions. [2020-10-16 12:33:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 12:33:34,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:34,302 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:33:34,302 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:33:34,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1291, Invalid=3265, Unknown=0, NotChecked=0, Total=4556 [2020-10-16 12:33:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:33:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-16 12:33:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 12:33:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 248 transitions. [2020-10-16 12:33:34,304 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 248 transitions. Word has length 30 [2020-10-16 12:33:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:34,305 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 248 transitions. [2020-10-16 12:33:34,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 248 transitions. [2020-10-16 12:33:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:34,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:34,305 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:34,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:34,506 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 130 times [2020-10-16 12:33:34,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:34,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721384601] [2020-10-16 12:33:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721384601] [2020-10-16 12:33:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057309307] [2020-10-16 12:33:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:34,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:33:34,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:34,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:34,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:34,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1408974189] [2020-10-16 12:33:34,949 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:34,950 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:34,958 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:34,958 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:34,968 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:34,968 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:35,000 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49695#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-10-16 12:33:35,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:35,001 INFO L87 Difference]: Start difference. First operand 97 states and 248 transitions. Second operand 27 states. [2020-10-16 12:33:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:36,745 INFO L93 Difference]: Finished difference Result 117 states and 291 transitions. [2020-10-16 12:33:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 12:33:36,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:36,747 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:33:36,747 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:33:36,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=3399, Unknown=0, NotChecked=0, Total=4830 [2020-10-16 12:33:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:33:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-10-16 12:33:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 12:33:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 256 transitions. [2020-10-16 12:33:36,749 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 256 transitions. Word has length 30 [2020-10-16 12:33:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:36,749 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 256 transitions. [2020-10-16 12:33:36,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 256 transitions. [2020-10-16 12:33:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 12:33:36,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:36,750 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:36,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:36,951 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 131 times [2020-10-16 12:33:36,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:36,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812398751] [2020-10-16 12:33:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812398751] [2020-10-16 12:33:37,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051206449] [2020-10-16 12:33:37,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:37,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:33:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 12:33:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:37,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:37,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 12:33:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [957089686] [2020-10-16 12:33:37,385 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:37,387 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:37,404 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-16 12:33:37,404 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:37,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:37,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:37,448 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50210#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-10-16 12:33:37,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:33:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:37,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:33:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:33:37,449 INFO L87 Difference]: Start difference. First operand 99 states and 256 transitions. Second operand 27 states. [2020-10-16 12:33:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:39,285 INFO L93 Difference]: Finished difference Result 117 states and 299 transitions. [2020-10-16 12:33:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 12:33:39,285 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-16 12:33:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:39,286 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:33:39,286 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:33:39,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1585, Invalid=3527, Unknown=0, NotChecked=0, Total=5112 [2020-10-16 12:33:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:33:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 12:33:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:33:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-16 12:33:39,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2020-10-16 12:33:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:39,288 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-16 12:33:39,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:33:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-16 12:33:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:39,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:39,288 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:39,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:39,489 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 132 times [2020-10-16 12:33:39,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:39,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338751282] [2020-10-16 12:33:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:39,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338751282] [2020-10-16 12:33:39,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802182814] [2020-10-16 12:33:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:40,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 12:33:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:40,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:40,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:40,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426521741] [2020-10-16 12:33:40,051 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:40,052 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:40,060 INFO L258 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2020-10-16 12:33:40,061 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:40,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:40,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:40,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:40,109 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:40,138 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:40,139 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:40,144 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:40,145 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:40,152 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50683#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:33:40,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:40,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:40,154 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 28 states. [2020-10-16 12:33:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:41,110 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2020-10-16 12:33:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:33:41,111 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:41,112 INFO L225 Difference]: With dead ends: 114 [2020-10-16 12:33:41,112 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 12:33:41,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:33:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 12:33:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-16 12:33:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:33:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-10-16 12:33:41,113 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 31 [2020-10-16 12:33:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:41,114 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-10-16 12:33:41,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-10-16 12:33:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:41,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:41,114 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:41,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 12:33:41,318 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 133 times [2020-10-16 12:33:41,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:41,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888410920] [2020-10-16 12:33:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888410920] [2020-10-16 12:33:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904278609] [2020-10-16 12:33:41,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:41,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:41,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [658329454] [2020-10-16 12:33:41,887 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:41,889 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:41,896 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:41,896 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:41,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:41,903 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:41,954 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51129#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:33:41,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:41,955 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 28 states. [2020-10-16 12:33:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:42,990 INFO L93 Difference]: Finished difference Result 162 states and 364 transitions. [2020-10-16 12:33:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:33:42,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:42,992 INFO L225 Difference]: With dead ends: 162 [2020-10-16 12:33:42,992 INFO L226 Difference]: Without dead ends: 156 [2020-10-16 12:33:42,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=872, Invalid=2320, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:33:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-16 12:33:42,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 84. [2020-10-16 12:33:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:33:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-10-16 12:33:42,995 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 31 [2020-10-16 12:33:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:42,995 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-10-16 12:33:42,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-10-16 12:33:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:42,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:42,996 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:43,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 12:33:43,197 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 134 times [2020-10-16 12:33:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:43,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154143773] [2020-10-16 12:33:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154143773] [2020-10-16 12:33:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831758973] [2020-10-16 12:33:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:43,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:33:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:43,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:43,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:43,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1116406503] [2020-10-16 12:33:43,740 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:43,742 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:43,749 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:43,749 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:43,755 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:43,755 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:43,795 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:33:43,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:43,796 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand 28 states. [2020-10-16 12:33:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:44,924 INFO L93 Difference]: Finished difference Result 159 states and 360 transitions. [2020-10-16 12:33:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:33:44,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:44,925 INFO L225 Difference]: With dead ends: 159 [2020-10-16 12:33:44,925 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 12:33:44,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=2525, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:33:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 12:33:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2020-10-16 12:33:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 12:33:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 214 transitions. [2020-10-16 12:33:44,927 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 214 transitions. Word has length 31 [2020-10-16 12:33:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:44,927 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 214 transitions. [2020-10-16 12:33:44,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 214 transitions. [2020-10-16 12:33:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:44,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:44,928 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:45,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 12:33:45,129 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 135 times [2020-10-16 12:33:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:45,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692702495] [2020-10-16 12:33:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692702495] [2020-10-16 12:33:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282015254] [2020-10-16 12:33:45,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:45,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 12:33:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:45,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:45,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:45,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528469426] [2020-10-16 12:33:45,657 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:45,659 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:45,665 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:45,666 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:45,672 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:45,673 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:45,708 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52146#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:33:45,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:45,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:45,709 INFO L87 Difference]: Start difference. First operand 86 states and 214 transitions. Second operand 28 states. [2020-10-16 12:33:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:46,922 INFO L93 Difference]: Finished difference Result 157 states and 358 transitions. [2020-10-16 12:33:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:33:46,922 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:46,923 INFO L225 Difference]: With dead ends: 157 [2020-10-16 12:33:46,923 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 12:33:46,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=2722, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 12:33:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 12:33:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2020-10-16 12:33:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 12:33:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 220 transitions. [2020-10-16 12:33:46,926 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 220 transitions. Word has length 31 [2020-10-16 12:33:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:46,926 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 220 transitions. [2020-10-16 12:33:46,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 220 transitions. [2020-10-16 12:33:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:46,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:46,926 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:47,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 12:33:47,130 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 136 times [2020-10-16 12:33:47,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:47,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028381793] [2020-10-16 12:33:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028381793] [2020-10-16 12:33:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390310980] [2020-10-16 12:33:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:47,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:33:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:47,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:47,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:47,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [172669151] [2020-10-16 12:33:47,645 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:47,647 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:47,654 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:47,654 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:47,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:47,661 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:47,699 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52663#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:33:47,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:47,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:47,700 INFO L87 Difference]: Start difference. First operand 88 states and 220 transitions. Second operand 28 states. [2020-10-16 12:33:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:49,012 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-10-16 12:33:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:33:49,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:49,014 INFO L225 Difference]: With dead ends: 155 [2020-10-16 12:33:49,014 INFO L226 Difference]: Without dead ends: 149 [2020-10-16 12:33:49,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=995, Invalid=2911, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 12:33:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-16 12:33:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2020-10-16 12:33:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 12:33:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 226 transitions. [2020-10-16 12:33:49,016 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 226 transitions. Word has length 31 [2020-10-16 12:33:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:49,017 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 226 transitions. [2020-10-16 12:33:49,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 226 transitions. [2020-10-16 12:33:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:49,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:49,017 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:49,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 12:33:49,218 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 137 times [2020-10-16 12:33:49,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:49,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023136720] [2020-10-16 12:33:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:49,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023136720] [2020-10-16 12:33:49,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921106261] [2020-10-16 12:33:49,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:49,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 12:33:49,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:49,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:49,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:49,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:49,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387550775] [2020-10-16 12:33:49,715 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:49,717 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:49,724 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:49,724 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:49,733 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:49,733 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:49,779 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53186#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:33:49,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:49,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:49,780 INFO L87 Difference]: Start difference. First operand 90 states and 226 transitions. Second operand 28 states. [2020-10-16 12:33:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:51,190 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-10-16 12:33:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:33:51,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:51,191 INFO L225 Difference]: With dead ends: 153 [2020-10-16 12:33:51,191 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 12:33:51,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1068, Invalid=3092, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:33:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 12:33:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2020-10-16 12:33:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 12:33:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 232 transitions. [2020-10-16 12:33:51,193 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 232 transitions. Word has length 31 [2020-10-16 12:33:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:51,194 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 232 transitions. [2020-10-16 12:33:51,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 232 transitions. [2020-10-16 12:33:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:51,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:51,194 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:51,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:51,395 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 138 times [2020-10-16 12:33:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:51,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23817250] [2020-10-16 12:33:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23817250] [2020-10-16 12:33:51,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824757749] [2020-10-16 12:33:51,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:51,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 12:33:51,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:51,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:51,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064980566] [2020-10-16 12:33:51,885 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:51,888 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:51,899 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:51,899 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:51,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:51,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:51,945 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53715#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:33:51,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:51,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:51,946 INFO L87 Difference]: Start difference. First operand 92 states and 232 transitions. Second operand 28 states. [2020-10-16 12:33:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:53,446 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-10-16 12:33:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:33:53,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:53,447 INFO L225 Difference]: With dead ends: 151 [2020-10-16 12:33:53,447 INFO L226 Difference]: Without dead ends: 145 [2020-10-16 12:33:53,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2020-10-16 12:33:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-16 12:33:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2020-10-16 12:33:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 12:33:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 238 transitions. [2020-10-16 12:33:53,450 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 238 transitions. Word has length 31 [2020-10-16 12:33:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 238 transitions. [2020-10-16 12:33:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 238 transitions. [2020-10-16 12:33:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:53,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:53,451 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:53,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 12:33:53,651 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:53,652 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 139 times [2020-10-16 12:33:53,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:53,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600519220] [2020-10-16 12:33:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:54,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600519220] [2020-10-16 12:33:54,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274155357] [2020-10-16 12:33:54,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:54,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:54,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:54,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1299465330] [2020-10-16 12:33:54,127 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:54,129 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:54,136 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:54,136 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:54,139 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:54,139 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:54,181 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54250#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:33:54,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:54,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:54,182 INFO L87 Difference]: Start difference. First operand 94 states and 238 transitions. Second operand 28 states. [2020-10-16 12:33:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:55,808 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 12:33:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 12:33:55,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:55,810 INFO L225 Difference]: With dead ends: 149 [2020-10-16 12:33:55,810 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 12:33:55,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1262, Invalid=3430, Unknown=0, NotChecked=0, Total=4692 [2020-10-16 12:33:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 12:33:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-10-16 12:33:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 12:33:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 244 transitions. [2020-10-16 12:33:55,814 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 244 transitions. Word has length 31 [2020-10-16 12:33:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:55,814 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 244 transitions. [2020-10-16 12:33:55,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 244 transitions. [2020-10-16 12:33:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:55,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:55,814 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:56,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:56,025 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 140 times [2020-10-16 12:33:56,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754815358] [2020-10-16 12:33:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:56,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754815358] [2020-10-16 12:33:56,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912073896] [2020-10-16 12:33:56,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:56,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:33:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:56,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:56,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:56,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1952307644] [2020-10-16 12:33:56,514 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:56,516 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:56,522 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:56,523 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:56,528 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:56,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:56,563 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54791#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:33:56,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:56,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:56,564 INFO L87 Difference]: Start difference. First operand 96 states and 244 transitions. Second operand 28 states. [2020-10-16 12:33:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:33:58,265 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-10-16 12:33:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 12:33:58,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:33:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:33:58,266 INFO L225 Difference]: With dead ends: 147 [2020-10-16 12:33:58,266 INFO L226 Difference]: Without dead ends: 141 [2020-10-16 12:33:58,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1383, Invalid=3587, Unknown=0, NotChecked=0, Total=4970 [2020-10-16 12:33:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-16 12:33:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-16 12:33:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 12:33:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 250 transitions. [2020-10-16 12:33:58,274 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 250 transitions. Word has length 31 [2020-10-16 12:33:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:33:58,275 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 250 transitions. [2020-10-16 12:33:58,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:33:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 250 transitions. [2020-10-16 12:33:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:33:58,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:33:58,275 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:33:58,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:58,476 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:33:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:33:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 141 times [2020-10-16 12:33:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:33:58,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200603353] [2020-10-16 12:33:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:33:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:33:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:58,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200603353] [2020-10-16 12:33:58,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614224962] [2020-10-16 12:33:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:33:58,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 12:33:58,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:33:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:33:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:33:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:33:58,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:33:58,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:33:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [150952457] [2020-10-16 12:33:58,962 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:33:58,964 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:33:58,971 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:33:58,971 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:33:58,981 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:33:58,981 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:33:59,016 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55338#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:33:59,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:33:59,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:33:59,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:33:59,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:33:59,017 INFO L87 Difference]: Start difference. First operand 98 states and 250 transitions. Second operand 28 states. [2020-10-16 12:34:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:00,832 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 12:34:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 12:34:00,833 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:34:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:00,833 INFO L225 Difference]: With dead ends: 145 [2020-10-16 12:34:00,833 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 12:34:00,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1520, Invalid=3736, Unknown=0, NotChecked=0, Total=5256 [2020-10-16 12:34:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 12:34:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2020-10-16 12:34:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 12:34:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 256 transitions. [2020-10-16 12:34:00,836 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 256 transitions. Word has length 31 [2020-10-16 12:34:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:00,836 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 256 transitions. [2020-10-16 12:34:00,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:34:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 256 transitions. [2020-10-16 12:34:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:34:00,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:00,837 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:01,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:01,038 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 142 times [2020-10-16 12:34:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:01,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446391627] [2020-10-16 12:34:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:01,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446391627] [2020-10-16 12:34:01,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572663221] [2020-10-16 12:34:01,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:01,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:34:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:01,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:34:01,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:01,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:01,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:34:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [818479256] [2020-10-16 12:34:01,519 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:01,521 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:01,528 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:34:01,528 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:01,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:01,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:01,570 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55891#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:34:01,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:34:01,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:01,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:34:01,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:34:01,571 INFO L87 Difference]: Start difference. First operand 100 states and 256 transitions. Second operand 28 states. [2020-10-16 12:34:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:03,483 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-16 12:34:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 12:34:03,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:34:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:03,485 INFO L225 Difference]: With dead ends: 145 [2020-10-16 12:34:03,485 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 12:34:03,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1673, Invalid=3877, Unknown=0, NotChecked=0, Total=5550 [2020-10-16 12:34:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 12:34:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2020-10-16 12:34:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 12:34:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 264 transitions. [2020-10-16 12:34:03,487 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 264 transitions. Word has length 31 [2020-10-16 12:34:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:03,487 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 264 transitions. [2020-10-16 12:34:03,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:34:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 264 transitions. [2020-10-16 12:34:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:34:03,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:03,488 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:03,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:03,689 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 143 times [2020-10-16 12:34:03,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:03,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443609432] [2020-10-16 12:34:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443609432] [2020-10-16 12:34:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280618919] [2020-10-16 12:34:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:04,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 12:34:04,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 12:34:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:04,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:04,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 12:34:04,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2144630977] [2020-10-16 12:34:04,174 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:04,175 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:04,183 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-16 12:34:04,183 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:04,204 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:04,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:04,241 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56452#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-10-16 12:34:04,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 12:34:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 12:34:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:34:04,242 INFO L87 Difference]: Start difference. First operand 102 states and 264 transitions. Second operand 28 states. [2020-10-16 12:34:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:06,220 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2020-10-16 12:34:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-16 12:34:06,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-16 12:34:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:06,221 INFO L225 Difference]: With dead ends: 146 [2020-10-16 12:34:06,221 INFO L226 Difference]: Without dead ends: 134 [2020-10-16 12:34:06,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1840, Invalid=4012, Unknown=0, NotChecked=0, Total=5852 [2020-10-16 12:34:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-16 12:34:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2020-10-16 12:34:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:34:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-16 12:34:06,223 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 31 [2020-10-16 12:34:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-16 12:34:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 12:34:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-16 12:34:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:06,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:06,223 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:06,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 12:34:06,424 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 144 times [2020-10-16 12:34:06,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:06,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937628708] [2020-10-16 12:34:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937628708] [2020-10-16 12:34:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645481959] [2020-10-16 12:34:06,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:07,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 12:34:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:07,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:07,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:07,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:07,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:07,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354401218] [2020-10-16 12:34:07,065 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:07,066 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:07,074 INFO L258 McrAutomatonBuilder]: Finished intersection with 41 states and 48 transitions. [2020-10-16 12:34:07,074 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:07,087 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:07,087 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:07,124 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56974#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:34:07,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:07,125 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 29 states. [2020-10-16 12:34:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:08,149 INFO L93 Difference]: Finished difference Result 142 states and 324 transitions. [2020-10-16 12:34:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:34:08,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:08,150 INFO L225 Difference]: With dead ends: 142 [2020-10-16 12:34:08,150 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 12:34:08,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:34:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 12:34:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2020-10-16 12:34:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:34:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 210 transitions. [2020-10-16 12:34:08,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 210 transitions. Word has length 32 [2020-10-16 12:34:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:08,152 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 210 transitions. [2020-10-16 12:34:08,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 210 transitions. [2020-10-16 12:34:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:08,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:08,153 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:08,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 12:34:08,354 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 145 times [2020-10-16 12:34:08,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:08,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947278224] [2020-10-16 12:34:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947278224] [2020-10-16 12:34:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329317714] [2020-10-16 12:34:08,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:08,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:08,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:08,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1089106853] [2020-10-16 12:34:08,957 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:08,959 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:08,967 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:08,967 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:08,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:08,968 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:09,013 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57462#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:34:09,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:09,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:09,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:09,015 INFO L87 Difference]: Start difference. First operand 85 states and 210 transitions. Second operand 29 states. [2020-10-16 12:34:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:10,146 INFO L93 Difference]: Finished difference Result 139 states and 320 transitions. [2020-10-16 12:34:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:34:10,147 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:10,148 INFO L225 Difference]: With dead ends: 139 [2020-10-16 12:34:10,148 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 12:34:10,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=882, Invalid=2424, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:34:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 12:34:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2020-10-16 12:34:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:34:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 216 transitions. [2020-10-16 12:34:10,151 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 216 transitions. Word has length 32 [2020-10-16 12:34:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:10,151 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 216 transitions. [2020-10-16 12:34:10,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 216 transitions. [2020-10-16 12:34:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:10,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:10,152 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:10,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 12:34:10,352 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 146 times [2020-10-16 12:34:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:10,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792753008] [2020-10-16 12:34:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:10,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792753008] [2020-10-16 12:34:10,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575341903] [2020-10-16 12:34:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:34:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:10,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:10,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:10,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [387725951] [2020-10-16 12:34:10,964 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:10,966 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:10,976 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:10,976 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:10,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:10,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:11,029 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57955#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:34:11,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:11,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:11,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:11,030 INFO L87 Difference]: Start difference. First operand 87 states and 216 transitions. Second operand 29 states. [2020-10-16 12:34:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:12,260 INFO L93 Difference]: Finished difference Result 137 states and 318 transitions. [2020-10-16 12:34:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:34:12,260 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:12,261 INFO L225 Difference]: With dead ends: 137 [2020-10-16 12:34:12,261 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 12:34:12,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=908, Invalid=2632, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:34:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 12:34:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-10-16 12:34:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 12:34:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 222 transitions. [2020-10-16 12:34:12,264 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 222 transitions. Word has length 32 [2020-10-16 12:34:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:12,264 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 222 transitions. [2020-10-16 12:34:12,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 222 transitions. [2020-10-16 12:34:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:12,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:12,265 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:12,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 12:34:12,465 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 147 times [2020-10-16 12:34:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:12,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698393239] [2020-10-16 12:34:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698393239] [2020-10-16 12:34:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881412011] [2020-10-16 12:34:12,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:13,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 12:34:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:13,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:13,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [884256697] [2020-10-16 12:34:13,028 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:13,031 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:13,053 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:13,053 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:13,063 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:13,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:13,100 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58454#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:34:13,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:13,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:13,101 INFO L87 Difference]: Start difference. First operand 89 states and 222 transitions. Second operand 29 states. [2020-10-16 12:34:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:14,453 INFO L93 Difference]: Finished difference Result 135 states and 316 transitions. [2020-10-16 12:34:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:34:14,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:14,454 INFO L225 Difference]: With dead ends: 135 [2020-10-16 12:34:14,454 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 12:34:14,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 12:34:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 12:34:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 91. [2020-10-16 12:34:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 12:34:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 228 transitions. [2020-10-16 12:34:14,456 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 228 transitions. Word has length 32 [2020-10-16 12:34:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:14,456 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 228 transitions. [2020-10-16 12:34:14,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 228 transitions. [2020-10-16 12:34:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:14,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:14,457 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:14,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 12:34:14,658 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 148 times [2020-10-16 12:34:14,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:14,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490366343] [2020-10-16 12:34:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:15,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490366343] [2020-10-16 12:34:15,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282173087] [2020-10-16 12:34:15,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:15,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:34:15,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:15,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:15,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:15,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1461494985] [2020-10-16 12:34:15,205 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:15,207 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:15,214 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:15,214 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:15,215 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:15,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:15,268 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58959#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:34:15,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:15,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:15,269 INFO L87 Difference]: Start difference. First operand 91 states and 228 transitions. Second operand 29 states. [2020-10-16 12:34:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:16,717 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 12:34:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:34:16,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:16,719 INFO L225 Difference]: With dead ends: 133 [2020-10-16 12:34:16,719 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 12:34:16,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1008, Invalid=3024, Unknown=0, NotChecked=0, Total=4032 [2020-10-16 12:34:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 12:34:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2020-10-16 12:34:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 12:34:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 234 transitions. [2020-10-16 12:34:16,722 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 234 transitions. Word has length 32 [2020-10-16 12:34:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:16,722 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 234 transitions. [2020-10-16 12:34:16,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 234 transitions. [2020-10-16 12:34:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:16,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:16,722 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:16,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:16,923 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 149 times [2020-10-16 12:34:16,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:16,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921535373] [2020-10-16 12:34:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:17,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921535373] [2020-10-16 12:34:17,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381837294] [2020-10-16 12:34:17,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:17,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 12:34:17,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:17,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:17,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:17,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [870461447] [2020-10-16 12:34:17,476 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:17,477 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:17,485 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:17,485 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:17,496 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:17,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:17,533 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59470#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-10-16 12:34:17,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:17,535 INFO L87 Difference]: Start difference. First operand 93 states and 234 transitions. Second operand 29 states. [2020-10-16 12:34:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:19,116 INFO L93 Difference]: Finished difference Result 131 states and 312 transitions. [2020-10-16 12:34:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:34:19,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:19,118 INFO L225 Difference]: With dead ends: 131 [2020-10-16 12:34:19,118 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 12:34:19,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1082, Invalid=3208, Unknown=0, NotChecked=0, Total=4290 [2020-10-16 12:34:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 12:34:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2020-10-16 12:34:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 12:34:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 240 transitions. [2020-10-16 12:34:19,121 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 240 transitions. Word has length 32 [2020-10-16 12:34:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:19,121 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 240 transitions. [2020-10-16 12:34:19,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 240 transitions. [2020-10-16 12:34:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:19,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:19,121 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:19,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:19,322 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 150 times [2020-10-16 12:34:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:19,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17581062] [2020-10-16 12:34:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17581062] [2020-10-16 12:34:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49618167] [2020-10-16 12:34:19,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:19,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 12:34:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:19,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:19,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1311964848] [2020-10-16 12:34:19,870 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:19,872 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:19,880 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:19,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:19,890 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:19,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:19,924 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59987#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-10-16 12:34:19,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:19,925 INFO L87 Difference]: Start difference. First operand 95 states and 240 transitions. Second operand 29 states. [2020-10-16 12:34:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:21,607 INFO L93 Difference]: Finished difference Result 129 states and 310 transitions. [2020-10-16 12:34:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:34:21,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:21,609 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:34:21,609 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:34:21,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1172, Invalid=3384, Unknown=0, NotChecked=0, Total=4556 [2020-10-16 12:34:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:34:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-10-16 12:34:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 12:34:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 246 transitions. [2020-10-16 12:34:21,614 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 246 transitions. Word has length 32 [2020-10-16 12:34:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:21,615 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 246 transitions. [2020-10-16 12:34:21,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 246 transitions. [2020-10-16 12:34:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:21,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:21,615 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:21,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:21,823 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 151 times [2020-10-16 12:34:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:21,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250560004] [2020-10-16 12:34:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:22,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250560004] [2020-10-16 12:34:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219351255] [2020-10-16 12:34:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:22,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:22,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:22,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [43047348] [2020-10-16 12:34:22,371 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:22,373 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:22,380 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:22,380 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:22,391 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:22,392 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:22,430 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [60510#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-10-16 12:34:22,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:22,431 INFO L87 Difference]: Start difference. First operand 97 states and 246 transitions. Second operand 29 states. [2020-10-16 12:34:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:24,246 INFO L93 Difference]: Finished difference Result 127 states and 308 transitions. [2020-10-16 12:34:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 12:34:24,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:24,247 INFO L225 Difference]: With dead ends: 127 [2020-10-16 12:34:24,247 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 12:34:24,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1278, Invalid=3552, Unknown=0, NotChecked=0, Total=4830 [2020-10-16 12:34:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 12:34:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 12:34:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 12:34:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2020-10-16 12:34:24,264 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 32 [2020-10-16 12:34:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:24,264 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2020-10-16 12:34:24,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2020-10-16 12:34:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:24,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:24,265 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:24,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:24,473 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 152 times [2020-10-16 12:34:24,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:24,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943870556] [2020-10-16 12:34:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943870556] [2020-10-16 12:34:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360441847] [2020-10-16 12:34:24,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:24,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:34:24,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:24,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:24,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:24,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:24,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1732754583] [2020-10-16 12:34:24,995 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:24,998 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:25,008 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:25,008 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:25,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:25,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:25,077 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61039#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-10-16 12:34:25,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:25,078 INFO L87 Difference]: Start difference. First operand 99 states and 252 transitions. Second operand 29 states. [2020-10-16 12:34:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:27,001 INFO L93 Difference]: Finished difference Result 125 states and 306 transitions. [2020-10-16 12:34:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 12:34:27,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:27,002 INFO L225 Difference]: With dead ends: 125 [2020-10-16 12:34:27,002 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 12:34:27,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1400, Invalid=3712, Unknown=0, NotChecked=0, Total=5112 [2020-10-16 12:34:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 12:34:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-16 12:34:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 12:34:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 258 transitions. [2020-10-16 12:34:27,005 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 258 transitions. Word has length 32 [2020-10-16 12:34:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:27,005 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 258 transitions. [2020-10-16 12:34:27,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 258 transitions. [2020-10-16 12:34:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:27,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:27,006 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:27,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:27,207 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 153 times [2020-10-16 12:34:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:27,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607837019] [2020-10-16 12:34:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:27,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607837019] [2020-10-16 12:34:27,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725869371] [2020-10-16 12:34:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:27,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 12:34:27,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:27,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:27,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:27,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [69778928] [2020-10-16 12:34:27,744 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:27,746 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:27,754 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:27,754 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:27,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:27,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:27,802 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61574#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-10-16 12:34:27,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:27,803 INFO L87 Difference]: Start difference. First operand 101 states and 258 transitions. Second operand 29 states. [2020-10-16 12:34:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:29,820 INFO L93 Difference]: Finished difference Result 123 states and 304 transitions. [2020-10-16 12:34:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 12:34:29,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:29,822 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:34:29,822 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:34:29,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1538, Invalid=3864, Unknown=0, NotChecked=0, Total=5402 [2020-10-16 12:34:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:34:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-10-16 12:34:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 12:34:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 264 transitions. [2020-10-16 12:34:29,824 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 264 transitions. Word has length 32 [2020-10-16 12:34:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:29,824 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 264 transitions. [2020-10-16 12:34:29,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 264 transitions. [2020-10-16 12:34:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:29,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:29,824 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:30,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:30,025 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 154 times [2020-10-16 12:34:30,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:30,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297871157] [2020-10-16 12:34:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:30,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297871157] [2020-10-16 12:34:30,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402448798] [2020-10-16 12:34:30,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:30,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:34:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:30,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:30,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:30,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [583267759] [2020-10-16 12:34:30,553 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:30,555 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:30,563 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:30,564 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:30,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:30,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:30,632 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62115#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-10-16 12:34:30,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:30,633 INFO L87 Difference]: Start difference. First operand 103 states and 264 transitions. Second operand 29 states. [2020-10-16 12:34:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:32,800 INFO L93 Difference]: Finished difference Result 123 states and 307 transitions. [2020-10-16 12:34:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 12:34:32,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:32,801 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:34:32,802 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:34:32,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1692, Invalid=4008, Unknown=0, NotChecked=0, Total=5700 [2020-10-16 12:34:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:34:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-10-16 12:34:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 12:34:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2020-10-16 12:34:32,805 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 32 [2020-10-16 12:34:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:32,805 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2020-10-16 12:34:32,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2020-10-16 12:34:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 12:34:32,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:32,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:33,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:33,006 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:33,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:33,007 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 155 times [2020-10-16 12:34:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:33,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570976411] [2020-10-16 12:34:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:33,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570976411] [2020-10-16 12:34:33,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805059065] [2020-10-16 12:34:33,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:33,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 12:34:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 12:34:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:33,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:33,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 12:34:33,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406745435] [2020-10-16 12:34:33,537 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:33,539 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:33,547 INFO L258 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-16 12:34:33,547 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:33,557 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:33,557 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:33,592 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62664#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-10-16 12:34:33,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 12:34:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 12:34:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:34:33,593 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand 29 states. [2020-10-16 12:34:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:35,822 INFO L93 Difference]: Finished difference Result 123 states and 315 transitions. [2020-10-16 12:34:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-16 12:34:35,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-16 12:34:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:35,823 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:34:35,823 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:34:35,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1860, Invalid=4146, Unknown=0, NotChecked=0, Total=6006 [2020-10-16 12:34:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:34:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-10-16 12:34:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:34:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-16 12:34:35,825 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2020-10-16 12:34:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:35,826 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-16 12:34:35,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 12:34:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-16 12:34:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:35,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:35,826 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:36,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 12:34:36,027 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 156 times [2020-10-16 12:34:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:36,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879893729] [2020-10-16 12:34:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:36,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879893729] [2020-10-16 12:34:36,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053132298] [2020-10-16 12:34:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:36,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-16 12:34:36,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:36,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:36,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:36,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [272354236] [2020-10-16 12:34:36,694 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:36,696 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:36,704 INFO L258 McrAutomatonBuilder]: Finished intersection with 43 states and 53 transitions. [2020-10-16 12:34:36,704 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:36,708 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:36,708 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:36,748 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:36,748 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:36,781 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:36,781 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:36,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:36,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:36,804 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63167#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-10-16 12:34:36,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:36,805 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 30 states. [2020-10-16 12:34:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:37,954 INFO L93 Difference]: Finished difference Result 120 states and 280 transitions. [2020-10-16 12:34:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:34:37,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:37,955 INFO L225 Difference]: With dead ends: 120 [2020-10-16 12:34:37,956 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 12:34:37,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:34:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 12:34:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-16 12:34:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 12:34:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-10-16 12:34:37,958 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 33 [2020-10-16 12:34:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:37,959 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-10-16 12:34:37,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-10-16 12:34:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:37,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:37,959 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:38,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:38,160 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 157 times [2020-10-16 12:34:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:38,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368358962] [2020-10-16 12:34:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:38,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368358962] [2020-10-16 12:34:38,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50811503] [2020-10-16 12:34:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1715544525] [2020-10-16 12:34:38,832 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:38,834 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:38,841 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:38,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:38,852 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:38,852 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:38,892 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63639#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-16 12:34:38,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:38,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:38,893 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 30 states. [2020-10-16 12:34:40,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:40,152 INFO L93 Difference]: Finished difference Result 172 states and 386 transitions. [2020-10-16 12:34:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:34:40,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:40,154 INFO L225 Difference]: With dead ends: 172 [2020-10-16 12:34:40,154 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 12:34:40,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1005, Invalid=2655, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 12:34:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 12:34:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2020-10-16 12:34:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 12:34:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 218 transitions. [2020-10-16 12:34:40,156 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 218 transitions. Word has length 33 [2020-10-16 12:34:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:40,156 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 218 transitions. [2020-10-16 12:34:40,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 218 transitions. [2020-10-16 12:34:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:40,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:40,157 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:40,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 12:34:40,358 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:40,358 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 158 times [2020-10-16 12:34:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:40,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390088185] [2020-10-16 12:34:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390088185] [2020-10-16 12:34:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271215705] [2020-10-16 12:34:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:40,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:34:40,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:41,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:41,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:41,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [659391219] [2020-10-16 12:34:41,008 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:41,010 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:41,034 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:41,034 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:41,038 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:41,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:41,081 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64175#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-10-16 12:34:41,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:41,082 INFO L87 Difference]: Start difference. First operand 88 states and 218 transitions. Second operand 30 states. [2020-10-16 12:34:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:42,401 INFO L93 Difference]: Finished difference Result 169 states and 382 transitions. [2020-10-16 12:34:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:34:42,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:42,402 INFO L225 Difference]: With dead ends: 169 [2020-10-16 12:34:42,402 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 12:34:42,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1028, Invalid=2878, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 12:34:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 12:34:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2020-10-16 12:34:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 12:34:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2020-10-16 12:34:42,405 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 33 [2020-10-16 12:34:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:42,406 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2020-10-16 12:34:42,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2020-10-16 12:34:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:42,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:42,406 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:42,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:42,607 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 159 times [2020-10-16 12:34:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:42,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111925306] [2020-10-16 12:34:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:43,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111925306] [2020-10-16 12:34:43,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606348532] [2020-10-16 12:34:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:43,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-16 12:34:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:43,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:43,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:43,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [77300327] [2020-10-16 12:34:43,249 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:43,251 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:43,259 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:43,260 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:43,262 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:43,262 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:43,312 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64716#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-10-16 12:34:43,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:43,313 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand 30 states. [2020-10-16 12:34:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:44,757 INFO L93 Difference]: Finished difference Result 167 states and 380 transitions. [2020-10-16 12:34:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:34:44,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:44,759 INFO L225 Difference]: With dead ends: 167 [2020-10-16 12:34:44,759 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 12:34:44,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:34:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 12:34:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2020-10-16 12:34:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 12:34:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 230 transitions. [2020-10-16 12:34:44,762 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 230 transitions. Word has length 33 [2020-10-16 12:34:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:44,763 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 230 transitions. [2020-10-16 12:34:44,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 230 transitions. [2020-10-16 12:34:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:44,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:44,763 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:44,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-10-16 12:34:44,971 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 160 times [2020-10-16 12:34:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:44,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584907230] [2020-10-16 12:34:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:45,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584907230] [2020-10-16 12:34:45,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593659161] [2020-10-16 12:34:45,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:45,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:34:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:45,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:45,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [601052544] [2020-10-16 12:34:45,578 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:45,580 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:45,588 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:45,588 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:45,592 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:45,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:45,637 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-10-16 12:34:45,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:45,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:45,638 INFO L87 Difference]: Start difference. First operand 92 states and 230 transitions. Second operand 30 states. [2020-10-16 12:34:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:47,190 INFO L93 Difference]: Finished difference Result 165 states and 378 transitions. [2020-10-16 12:34:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:34:47,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:47,192 INFO L225 Difference]: With dead ends: 165 [2020-10-16 12:34:47,192 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 12:34:47,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1122, Invalid=3300, Unknown=0, NotChecked=0, Total=4422 [2020-10-16 12:34:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 12:34:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 94. [2020-10-16 12:34:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 12:34:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 236 transitions. [2020-10-16 12:34:47,195 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 236 transitions. Word has length 33 [2020-10-16 12:34:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:47,195 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 236 transitions. [2020-10-16 12:34:47,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 236 transitions. [2020-10-16 12:34:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:47,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:47,196 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:47,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:47,404 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 161 times [2020-10-16 12:34:47,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:47,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390795923] [2020-10-16 12:34:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:47,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390795923] [2020-10-16 12:34:47,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725386956] [2020-10-16 12:34:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:47,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-16 12:34:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:48,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:48,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:48,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1648494971] [2020-10-16 12:34:48,007 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:48,009 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:48,033 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:48,034 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:48,054 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:48,054 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:48,092 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65816#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-10-16 12:34:48,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:48,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:48,094 INFO L87 Difference]: Start difference. First operand 94 states and 236 transitions. Second operand 30 states. [2020-10-16 12:34:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:49,731 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2020-10-16 12:34:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:34:49,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:49,732 INFO L225 Difference]: With dead ends: 163 [2020-10-16 12:34:49,732 INFO L226 Difference]: Without dead ends: 157 [2020-10-16 12:34:49,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1193, Invalid=3499, Unknown=0, NotChecked=0, Total=4692 [2020-10-16 12:34:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-16 12:34:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 96. [2020-10-16 12:34:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 12:34:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 242 transitions. [2020-10-16 12:34:49,736 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 242 transitions. Word has length 33 [2020-10-16 12:34:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:49,736 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 242 transitions. [2020-10-16 12:34:49,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 242 transitions. [2020-10-16 12:34:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:49,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:49,736 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:49,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:49,937 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 162 times [2020-10-16 12:34:49,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:49,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389323659] [2020-10-16 12:34:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389323659] [2020-10-16 12:34:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876197839] [2020-10-16 12:34:50,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:50,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-16 12:34:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:34:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:50,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:34:50,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-16 12:34:50,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [130935005] [2020-10-16 12:34:50,540 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:34:50,542 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:34:50,550 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-16 12:34:50,550 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:34:50,561 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:34:50,561 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:34:50,601 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66375#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-10-16 12:34:50,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:34:50,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:34:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:34:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:34:50,602 INFO L87 Difference]: Start difference. First operand 96 states and 242 transitions. Second operand 30 states. [2020-10-16 12:34:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:34:52,385 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2020-10-16 12:34:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 12:34:52,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-16 12:34:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:34:52,387 INFO L225 Difference]: With dead ends: 161 [2020-10-16 12:34:52,387 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 12:34:52,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1280, Invalid=3690, Unknown=0, NotChecked=0, Total=4970 [2020-10-16 12:34:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 12:34:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-10-16 12:34:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 12:34:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 248 transitions. [2020-10-16 12:34:52,390 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 248 transitions. Word has length 33 [2020-10-16 12:34:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:34:52,390 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 248 transitions. [2020-10-16 12:34:52,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:34:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 248 transitions. [2020-10-16 12:34:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:34:52,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:34:52,391 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:34:52,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:52,592 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:34:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:34:52,592 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 163 times [2020-10-16 12:34:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:34:52,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037785882] [2020-10-16 12:34:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:34:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:34:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037785882] [2020-10-16 12:34:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810785629] [2020-10-16 12:34:53,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2020-10-16 12:34:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:34:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 12:34:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:34:53,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:34:53,355 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 12:34:53,359 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 12:34:53,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:34:53 BasicIcfg [2020-10-16 12:34:53,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:34:53,361 INFO L168 Benchmark]: Toolchain (without parser) took 252507.91 ms. Allocated memory was 139.5 MB in the beginning and 300.4 MB in the end (delta: 161.0 MB). Free memory was 101.4 MB in the beginning and 218.6 MB in the end (delta: -117.2 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,361 INFO L168 Benchmark]: CDTParser took 1.02 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.58 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 160.9 MB in the end (delta: -59.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.63 ms. Allocated memory is still 201.3 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,363 INFO L168 Benchmark]: Boogie Preprocessor took 26.30 ms. Allocated memory is still 201.3 MB. Free memory was 158.3 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,363 INFO L168 Benchmark]: RCFGBuilder took 406.76 ms. Allocated memory is still 201.3 MB. Free memory was 157.0 MB in the beginning and 137.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,364 INFO L168 Benchmark]: TraceAbstraction took 251305.86 ms. Allocated memory was 201.3 MB in the beginning and 300.4 MB in the end (delta: 99.1 MB). Free memory was 136.4 MB in the beginning and 218.6 MB in the end (delta: -82.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-10-16 12:34:53,366 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 693.58 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 160.9 MB in the end (delta: -59.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.63 ms. Allocated memory is still 201.3 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.30 ms. Allocated memory is still 201.3 MB. Free memory was 158.3 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.76 ms. Allocated memory is still 201.3 MB. Free memory was 157.0 MB in the beginning and 137.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251305.86 ms. Allocated memory was 201.3 MB in the beginning and 300.4 MB in the end (delta: 99.1 MB). Free memory was 136.4 MB in the beginning and 218.6 MB in the end (delta: -82.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 13,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 251.1s, OverallIterations: 165, TraceHistogramMax: 13, AutomataDifference: 150.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2324 SDtfs, 10597 SDslu, 20585 SDs, 0 SdLazy, 22804 SolverSat, 14392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12306 GetRequests, 4492 SyntacticMatches, 197 SemanticMatches, 7617 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99402 ImplicationChecksByTransitivity, 159.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=156, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 164 MinimizatonAttempts, 5134 StatesRemovedByMinimization, 163 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 45.2s InterpolantComputationTime, 7988 NumberOfCodeBlocks, 7988 NumberOfCodeBlocksAsserted, 999 NumberOfCheckSat, 7663 ConstructedInterpolants, 0 QuantifiedInterpolants, 904239 SizeOfPredicates, 2694 NumberOfNonLiveVariables, 23774 ConjunctsInSsa, 3338 ConjunctsInUnsatCore, 325 InterpolantComputations, 3 PerfectInterpolantSequences, 0/22608 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown