/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:57:09,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:57:09,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:57:09,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:57:09,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:57:09,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:57:09,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:57:09,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:57:09,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:57:09,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:57:09,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:57:09,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:57:09,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:57:09,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:57:09,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:57:09,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:57:09,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:57:09,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:57:09,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:57:09,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:57:09,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:57:09,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:57:09,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:57:09,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:57:09,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 14:57:09,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:57:10,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:57:10,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:57:10,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:57:10,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:57:10,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:57:10,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:57:10,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:57:10,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:57:10,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:57:10,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:57:10,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-17 14:57:10,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:57:10,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:57:10,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:57:10,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:57:10,048 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:57:10,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:57:10,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:57:10,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:57:10,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:57:10,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:57:10,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:57:10,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:57:10,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:57:10,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:57:10,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:57:10,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:57:10,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:57:10,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:57:10,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:57:10,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:57:10,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:57:10,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:57:10,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:57:10,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:57:10,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:57:10,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:57:10,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:57:10,054 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-17 14:57:10,054 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:57:10,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:57:10,054 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-17 14:57:10,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:57:10,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:57:10,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:57:10,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:57:10,518 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:57:10,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-17 14:57:10,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d753506f7/dc55fca8d06d465595ad58b6e88f0d0e/FLAGa6c572fce [2020-09-17 14:57:11,296 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:57:11,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-17 14:57:11,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d753506f7/dc55fca8d06d465595ad58b6e88f0d0e/FLAGa6c572fce [2020-09-17 14:57:11,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d753506f7/dc55fca8d06d465595ad58b6e88f0d0e [2020-09-17 14:57:11,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:57:11,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:57:11,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:57:11,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:57:11,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:57:11,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:57:11" (1/1) ... [2020-09-17 14:57:11,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d965f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:11, skipping insertion in model container [2020-09-17 14:57:11,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:57:11" (1/1) ... [2020-09-17 14:57:11,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:57:11,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:57:12,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:57:12,166 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:57:12,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:57:12,290 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:57:12,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12 WrapperNode [2020-09-17 14:57:12,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:57:12,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:57:12,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:57:12,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:57:12,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:57:12,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:57:12,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:57:12,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:57:12,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... [2020-09-17 14:57:12,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:57:12,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:57:12,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:57:12,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:57:12,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:57:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 14:57:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 14:57:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 14:57:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 14:57:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:57:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 14:57:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:57:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:57:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 14:57:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:57:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:57:12,473 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 14:57:12,844 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:57:12,845 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 14:57:12,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:57:12 BoogieIcfgContainer [2020-09-17 14:57:12,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:57:12,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:57:12,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:57:12,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:57:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:57:11" (1/3) ... [2020-09-17 14:57:12,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b7b86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:57:12, skipping insertion in model container [2020-09-17 14:57:12,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:12" (2/3) ... [2020-09-17 14:57:12,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b7b86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:57:12, skipping insertion in model container [2020-09-17 14:57:12,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:57:12" (3/3) ... [2020-09-17 14:57:12,861 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-09-17 14:57:12,875 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:57:12,876 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:57:12,889 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:57:12,891 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:57:12,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,929 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,941 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,941 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,945 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,954 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,955 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,956 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:12,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 14:57:13,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:57:13,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:57:13,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:57:13,016 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-17 14:57:13,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:57:13,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:57:13,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:57:13,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:57:13,035 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:13,038 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:13,086 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:57:13,087 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:57:13,098 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. [2020-09-17 14:57:13,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:13,121 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:57:13,121 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:57:13,122 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. [2020-09-17 14:57:13,125 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 14:57:13,126 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:57:14,213 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 14:57:14,433 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 14:57:14,433 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 14:57:14,438 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 14:57:14,452 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 14:57:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 14:57:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 14:57:14,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:14,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 14:57:14,465 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 14:57:14,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:14,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021047258] [2020-09-17 14:57:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:14,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021047258] [2020-09-17 14:57:14,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:14,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 14:57:14,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [674923480] [2020-09-17 14:57:14,750 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:14,772 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:14,793 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-17 14:57:14,793 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:14,796 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:57:14,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 14:57:14,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 14:57:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 14:57:14,819 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 14:57:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:14,902 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 14:57:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 14:57:14,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 14:57:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:14,918 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:14,918 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 14:57:14,920 INFO L675 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 [2020-09-17 14:57:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 14:57:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 14:57:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 14:57:14,962 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 14:57:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:14,962 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 14:57:14,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 14:57:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 14:57:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:57:14,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:14,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:14,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:57:14,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 14:57:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:14,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104785116] [2020-09-17 14:57:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104785116] [2020-09-17 14:57:15,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:15,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:57:15,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298264401] [2020-09-17 14:57:15,085 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:15,085 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:15,089 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-17 14:57:15,089 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:15,113 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:57:15,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 14:57:15,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 14:57:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:57:15,116 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 14:57:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:15,150 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 14:57:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 14:57:15,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 14:57:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:15,152 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:57:15,152 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:57:15,153 INFO L675 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 [2020-09-17 14:57:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:57:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:57:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 14:57:15,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 14:57:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:15,164 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 14:57:15,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 14:57:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 14:57:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 14:57:15,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:15,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:15,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 14:57:15,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:15,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 14:57:15,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:15,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291280928] [2020-09-17 14:57:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291280928] [2020-09-17 14:57:15,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:15,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 14:57:15,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1801448370] [2020-09-17 14:57:15,267 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:15,268 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:15,272 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-17 14:57:15,272 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:15,280 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,330 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:15,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 14:57:15,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 14:57:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-17 14:57:15,331 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-17 14:57:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:15,490 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-17 14:57:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:57:15,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-17 14:57:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:15,492 INFO L225 Difference]: With dead ends: 62 [2020-09-17 14:57:15,492 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 14:57:15,493 INFO L675 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 [2020-09-17 14:57:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 14:57:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-17 14:57:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 14:57:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 14:57:15,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-17 14:57:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:15,505 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 14:57:15,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 14:57:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 14:57:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:57:15,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:15,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:15,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 14:57:15,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-17 14:57:15,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:15,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748555616] [2020-09-17 14:57:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748555616] [2020-09-17 14:57:15,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026860773] [2020-09-17 14:57:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:15,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:15,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:57:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:15,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:57:15,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759379767] [2020-09-17 14:57:15,750 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:15,751 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:15,754 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-17 14:57:15,754 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:15,756 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,756 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,784 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,806 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,826 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,838 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,838 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,846 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,846 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,864 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,924 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:15,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:57:15,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:57:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:57:15,926 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-17 14:57:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:16,091 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-17 14:57:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:57:16,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:57:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:16,093 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:57:16,094 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:57:16,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:57:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:57:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-17 14:57:16,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-17 14:57:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:16,102 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-17 14:57:16,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:57:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-17 14:57:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:57:16,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:16,103 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:16,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:16,305 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-17 14:57:16,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:16,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147206896] [2020-09-17 14:57:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:16,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147206896] [2020-09-17 14:57:16,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888063843] [2020-09-17 14:57:16,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:16,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 14:57:16,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:57:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:16,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:16,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:57:16,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710322257] [2020-09-17 14:57:16,466 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:16,468 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:16,469 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-17 14:57:16,470 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:16,471 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:16,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:16,525 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:16,525 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:16,543 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:16,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:57:16,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:16,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:57:16,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:57:16,545 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-17 14:57:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:16,749 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-17 14:57:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:57:16,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:57:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:16,752 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:57:16,752 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:57:16,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:57:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-17 14:57:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:57:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-17 14:57:16,761 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-17 14:57:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:16,761 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-17 14:57:16,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:57:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-17 14:57:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:57:16,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:16,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:16,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:16,964 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-17 14:57:16,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:16,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955071300] [2020-09-17 14:57:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955071300] [2020-09-17 14:57:17,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939514771] [2020-09-17 14:57:17,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:17,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:17,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:57:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:17,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:57:17,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1299579700] [2020-09-17 14:57:17,196 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:17,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:17,201 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-17 14:57:17,201 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:17,211 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,262 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,281 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:17,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:57:17,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:57:17,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:57:17,283 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-17 14:57:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:17,460 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-17 14:57:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:57:17,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:57:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:17,463 INFO L225 Difference]: With dead ends: 64 [2020-09-17 14:57:17,463 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 14:57:17,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 14:57:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 14:57:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 14:57:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-17 14:57:17,470 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-17 14:57:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:17,471 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-17 14:57:17,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:57:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-17 14:57:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:57:17,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:17,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:17,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:17,685 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-17 14:57:17,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:17,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003563442] [2020-09-17 14:57:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003563442] [2020-09-17 14:57:17,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487769153] [2020-09-17 14:57:17,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:17,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:57:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:17,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:57:17,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1158284070] [2020-09-17 14:57:17,889 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:17,891 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:17,895 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-17 14:57:17,895 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:17,897 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,897 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,940 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,960 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:17,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:57:17,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:57:17,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:57:17,961 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-17 14:57:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:18,224 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-17 14:57:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:57:18,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:57:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:18,226 INFO L225 Difference]: With dead ends: 63 [2020-09-17 14:57:18,226 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 14:57:18,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 14:57:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-17 14:57:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:57:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 14:57:18,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-17 14:57:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:18,232 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 14:57:18,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:57:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 14:57:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:18,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:18,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:18,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:18,446 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-17 14:57:18,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:18,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773828920] [2020-09-17 14:57:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:18,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773828920] [2020-09-17 14:57:18,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65242461] [2020-09-17 14:57:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:18,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 14:57:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:18,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:18,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:18,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1501708350] [2020-09-17 14:57:18,660 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:18,661 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:18,665 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-17 14:57:18,665 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:18,667 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,667 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,692 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,692 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,716 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,716 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,727 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,727 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,737 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,737 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,745 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,746 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,769 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,783 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,792 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:18,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:18,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:18,794 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-17 14:57:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:18,969 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-17 14:57:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:57:18,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:18,970 INFO L225 Difference]: With dead ends: 60 [2020-09-17 14:57:18,970 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:57:18,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:57:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 14:57:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:57:18,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-17 14:57:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:18,977 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:57:18,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:57:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:18,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:18,978 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:19,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:19,179 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-17 14:57:19,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:19,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498395423] [2020-09-17 14:57:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498395423] [2020-09-17 14:57:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374185227] [2020-09-17 14:57:19,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:19,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:19,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:19,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [642009197] [2020-09-17 14:57:19,373 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:19,375 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:19,378 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:57:19,378 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:19,384 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:19,384 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:19,422 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:19,422 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:19,433 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:19,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:19,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:19,434 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-17 14:57:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:19,681 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 14:57:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:19,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:19,683 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:57:19,683 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 14:57:19,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:57:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 14:57:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 14:57:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 14:57:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-17 14:57:19,689 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-17 14:57:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:19,689 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-17 14:57:19,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-17 14:57:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:19,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:19,691 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:19,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:19,905 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-17 14:57:19,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:19,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673557616] [2020-09-17 14:57:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:19,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673557616] [2020-09-17 14:57:19,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142975291] [2020-09-17 14:57:19,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:20,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:20,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:20,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:20,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:20,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [434446756] [2020-09-17 14:57:20,072 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:20,073 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:20,076 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:57:20,076 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:20,079 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,107 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,108 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,124 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:20,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:20,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:20,125 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-17 14:57:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:20,451 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-17 14:57:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:57:20,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:20,452 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:57:20,452 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 14:57:20,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:57:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 14:57:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-17 14:57:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 14:57:20,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-17 14:57:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:20,458 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 14:57:20,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 14:57:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:20,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:20,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 14:57:20,671 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-17 14:57:20,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:20,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532961265] [2020-09-17 14:57:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:20,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532961265] [2020-09-17 14:57:20,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070453546] [2020-09-17 14:57:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:20,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:57:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:20,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1603628381] [2020-09-17 14:57:20,917 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:20,918 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:20,921 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-17 14:57:20,922 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:20,930 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,930 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,969 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,969 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,985 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:20,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:20,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:20,987 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-17 14:57:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:21,190 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-17 14:57:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:57:21,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:21,191 INFO L225 Difference]: With dead ends: 70 [2020-09-17 14:57:21,191 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 14:57:21,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:57:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 14:57:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-17 14:57:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 14:57:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-17 14:57:21,197 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-17 14:57:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:21,203 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-17 14:57:21,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-17 14:57:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:21,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:21,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:21,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 14:57:21,407 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-17 14:57:21,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:21,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523681975] [2020-09-17 14:57:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:21,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523681975] [2020-09-17 14:57:21,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748113322] [2020-09-17 14:57:21,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:21,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:21,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:21,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:21,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:21,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:21,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1296850787] [2020-09-17 14:57:21,598 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:21,599 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:21,603 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:57:21,603 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:21,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,672 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:21,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:21,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:21,674 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-17 14:57:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:21,938 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 14:57:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:21,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:21,940 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:57:21,940 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:57:21,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:57:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:57:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-17 14:57:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 14:57:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-17 14:57:21,945 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-17 14:57:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:21,946 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-17 14:57:21,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-17 14:57:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:21,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:21,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:22,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:22,150 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-17 14:57:22,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:22,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868267176] [2020-09-17 14:57:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868267176] [2020-09-17 14:57:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92656447] [2020-09-17 14:57:22,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:22,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 14:57:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:22,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:22,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:22,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1299499969] [2020-09-17 14:57:22,354 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:22,355 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:22,359 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:57:22,359 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:22,362 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:22,363 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:22,401 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:22,401 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:22,435 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:22,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:22,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:22,437 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-17 14:57:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:22,758 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-17 14:57:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:57:22,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:22,759 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:57:22,760 INFO L226 Difference]: Without dead ends: 57 [2020-09-17 14:57:22,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:57:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-17 14:57:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-17 14:57:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 14:57:22,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-17 14:57:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:22,764 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 14:57:22,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 14:57:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:22,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:22,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:22,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:22,976 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-17 14:57:22,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:22,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748341375] [2020-09-17 14:57:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748341375] [2020-09-17 14:57:23,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579172092] [2020-09-17 14:57:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:23,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:57:23,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:23,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:23,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2047012493] [2020-09-17 14:57:23,181 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:23,182 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:23,186 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-17 14:57:23,186 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:23,187 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,187 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,217 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,234 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,234 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,247 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,248 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,257 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,258 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,272 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,284 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,299 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:23,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:23,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:23,301 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-17 14:57:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:23,550 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-17 14:57:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:23,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:23,552 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:57:23,552 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 14:57:23,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:57:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 14:57:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 14:57:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:57:23,556 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-17 14:57:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:23,556 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:57:23,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:57:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:23,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:23,557 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:23,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:57:23,768 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-17 14:57:23,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:23,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676304337] [2020-09-17 14:57:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676304337] [2020-09-17 14:57:23,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273170692] [2020-09-17 14:57:23,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:23,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336525155] [2020-09-17 14:57:23,947 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:23,948 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:23,950 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:23,951 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:23,953 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,953 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,988 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,988 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:24,003 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:24,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:24,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:24,005 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-17 14:57:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:24,332 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-17 14:57:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:24,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:24,334 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:57:24,334 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 14:57:24,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:57:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 14:57:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 14:57:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 14:57:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-17 14:57:24,340 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-17 14:57:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:24,341 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-17 14:57:24,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-17 14:57:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:24,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:24,342 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:24,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 14:57:24,554 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-17 14:57:24,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:24,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296769555] [2020-09-17 14:57:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:24,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296769555] [2020-09-17 14:57:24,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455970270] [2020-09-17 14:57:24,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:24,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:24,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:24,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:24,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1270821023] [2020-09-17 14:57:24,742 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:24,744 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:24,746 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:24,747 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:24,748 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:24,748 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:24,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:24,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:24,790 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:24,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:24,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:24,791 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-17 14:57:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:25,194 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 14:57:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:25,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:25,196 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:25,196 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:25,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 14:57:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:57:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-17 14:57:25,200 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-17 14:57:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:25,201 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-17 14:57:25,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-17 14:57:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:25,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:25,202 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:25,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:57:25,412 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:25,412 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-17 14:57:25,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:25,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936176004] [2020-09-17 14:57:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:25,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936176004] [2020-09-17 14:57:25,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008763992] [2020-09-17 14:57:25,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:25,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 14:57:25,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:25,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:25,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:25,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:25,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2054049443] [2020-09-17 14:57:25,591 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:25,592 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:25,595 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:25,595 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:25,598 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:25,598 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:25,631 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:25,632 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:25,650 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:25,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:25,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:25,652 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-17 14:57:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:26,184 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-17 14:57:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:57:26,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:26,186 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:57:26,187 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 14:57:26,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 14:57:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-17 14:57:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 14:57:26,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-17 14:57:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:26,196 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 14:57:26,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 14:57:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:26,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:26,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:26,408 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-17 14:57:26,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:26,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019019753] [2020-09-17 14:57:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:26,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019019753] [2020-09-17 14:57:26,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515255586] [2020-09-17 14:57:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:26,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:26,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:26,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:26,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1518619855] [2020-09-17 14:57:26,748 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:26,750 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:26,758 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-17 14:57:26,758 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:26,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:26,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:26,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:26,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:26,827 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:26,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:26,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:26,828 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-17 14:57:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:27,164 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 14:57:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:27,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:27,166 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:57:27,166 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:57:27,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:57:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:57:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-17 14:57:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 14:57:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-17 14:57:27,173 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-17 14:57:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:27,173 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-17 14:57:27,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-17 14:57:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:27,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:27,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:27,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:57:27,385 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-17 14:57:27,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:27,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145512966] [2020-09-17 14:57:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:27,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145512966] [2020-09-17 14:57:27,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639004560] [2020-09-17 14:57:27,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:27,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 14:57:27,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:27,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:27,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:27,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:27,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1458114108] [2020-09-17 14:57:27,590 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:27,591 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:27,594 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:27,594 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:27,601 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:27,601 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:27,645 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:27,646 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:27,656 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:27,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:27,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:27,657 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-17 14:57:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:28,049 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-17 14:57:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:28,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:28,051 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:28,051 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:28,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:57:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 14:57:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 14:57:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 14:57:28,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-17 14:57:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:28,055 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 14:57:28,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 14:57:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:28,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:28,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:28,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:28,266 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:28,266 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-17 14:57:28,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:28,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815701633] [2020-09-17 14:57:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:28,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815701633] [2020-09-17 14:57:28,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317592260] [2020-09-17 14:57:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:28,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:57:28,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:28,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:28,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:28,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1732343761] [2020-09-17 14:57:28,482 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:28,483 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:28,486 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:28,486 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:28,493 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:28,494 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:28,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:28,528 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:28,538 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:28,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:28,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:28,539 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-17 14:57:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:29,011 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-17 14:57:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:29,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:29,013 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:29,013 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:29,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:57:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-17 14:57:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:57:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-17 14:57:29,017 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-17 14:57:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:29,017 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-17 14:57:29,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-17 14:57:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:29,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:29,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:29,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:29,229 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:29,230 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-17 14:57:29,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:29,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564965829] [2020-09-17 14:57:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:29,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564965829] [2020-09-17 14:57:29,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336162324] [2020-09-17 14:57:29,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:29,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:29,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:29,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [980130118] [2020-09-17 14:57:29,423 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:29,424 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:29,427 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:29,427 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:29,428 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:29,428 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:29,463 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:29,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:29,475 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:57:29,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:29,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:29,477 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-17 14:57:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:29,944 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-17 14:57:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:57:29,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:29,946 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:29,946 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:57:29,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:57:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:57:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 14:57:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:57:29,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-17 14:57:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:29,951 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:57:29,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:57:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:29,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:29,952 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:30,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:57:30,163 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:30,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-17 14:57:30,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:30,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538593852] [2020-09-17 14:57:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:30,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538593852] [2020-09-17 14:57:30,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482600177] [2020-09-17 14:57:30,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:30,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:30,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:30,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:30,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1668994769] [2020-09-17 14:57:30,413 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:30,415 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:30,418 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-17 14:57:30,418 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:30,419 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,444 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,461 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,461 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,467 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,475 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,476 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,489 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,489 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,509 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,519 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,519 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,526 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:30,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:30,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:30,527 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-17 14:57:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:30,841 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-17 14:57:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:30,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:30,843 INFO L225 Difference]: With dead ends: 72 [2020-09-17 14:57:30,843 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 14:57:30,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:57:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 14:57:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 14:57:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:57:30,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-17 14:57:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:30,847 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:57:30,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:57:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:30,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:30,848 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:31,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:31,059 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-17 14:57:31,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:31,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794393336] [2020-09-17 14:57:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:31,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794393336] [2020-09-17 14:57:31,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195664537] [2020-09-17 14:57:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:31,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:57:31,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:31,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:31,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:31,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:31,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1804979940] [2020-09-17 14:57:31,284 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:31,285 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:31,288 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:31,288 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:31,290 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,327 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,327 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,343 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:31,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:31,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:31,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:31,344 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-17 14:57:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:31,739 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-17 14:57:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:31,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:31,741 INFO L225 Difference]: With dead ends: 92 [2020-09-17 14:57:31,741 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:57:31,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:57:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-17 14:57:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 14:57:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-17 14:57:31,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-17 14:57:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:31,745 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-17 14:57:31,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-17 14:57:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:31,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:31,746 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:31,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 14:57:31,947 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-17 14:57:31,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:31,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768024457] [2020-09-17 14:57:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:32,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768024457] [2020-09-17 14:57:32,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838655427] [2020-09-17 14:57:32,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:32,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:32,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:32,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [29914163] [2020-09-17 14:57:32,163 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:32,165 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:32,168 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:32,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:32,177 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:32,177 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:32,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:32,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:32,244 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:32,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:32,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:32,245 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-17 14:57:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:32,688 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-17 14:57:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:32,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:32,690 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:32,690 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:32,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 14:57:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-17 14:57:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:57:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-17 14:57:32,694 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-17 14:57:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:32,695 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-17 14:57:32,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-17 14:57:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:32,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:32,696 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:32,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 14:57:32,897 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-17 14:57:32,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:32,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152339783] [2020-09-17 14:57:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:33,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152339783] [2020-09-17 14:57:33,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002839330] [2020-09-17 14:57:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:33,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:57:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:33,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:33,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:33,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [530398236] [2020-09-17 14:57:33,111 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:33,113 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:33,117 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:33,117 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:33,118 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:33,118 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:33,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:33,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:33,165 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:33,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:33,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:33,166 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-17 14:57:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:33,641 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-17 14:57:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:33,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:33,643 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:33,643 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:33,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 14:57:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:57:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-17 14:57:33,648 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-17 14:57:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:33,648 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-17 14:57:33,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-17 14:57:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:33,649 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:33,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:33,859 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-17 14:57:33,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:33,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943419048] [2020-09-17 14:57:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:33,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943419048] [2020-09-17 14:57:33,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528339499] [2020-09-17 14:57:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:34,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 14:57:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:34,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:34,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:34,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1834117296] [2020-09-17 14:57:34,072 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:34,074 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:34,076 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:34,076 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:34,077 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:34,078 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:34,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:34,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:34,124 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:34,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:34,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:34,125 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-17 14:57:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:34,712 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-17 14:57:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:57:34,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:34,715 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:57:34,715 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:57:34,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:57:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:57:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-17 14:57:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 14:57:34,718 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-17 14:57:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:34,718 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 14:57:34,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 14:57:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:34,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:34,719 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:34,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 14:57:34,921 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-17 14:57:34,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:34,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144952298] [2020-09-17 14:57:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:35,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144952298] [2020-09-17 14:57:35,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368194577] [2020-09-17 14:57:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:35,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:35,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:35,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [813308980] [2020-09-17 14:57:35,155 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:35,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:35,160 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-17 14:57:35,161 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:35,166 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:35,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:35,212 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:35,212 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:35,224 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:35,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:35,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:35,226 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-17 14:57:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:35,557 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-17 14:57:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:35,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:35,558 INFO L225 Difference]: With dead ends: 86 [2020-09-17 14:57:35,559 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 14:57:35,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:57:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 14:57:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 14:57:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:57:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-17 14:57:35,562 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-17 14:57:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:35,563 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-17 14:57:35,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-17 14:57:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:35,565 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:35,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:35,766 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-17 14:57:35,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:35,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226730455] [2020-09-17 14:57:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:35,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226730455] [2020-09-17 14:57:35,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486224029] [2020-09-17 14:57:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:35,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:35,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:35,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:35,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:35,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:35,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616406367] [2020-09-17 14:57:35,979 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:35,980 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:35,983 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:35,983 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:35,984 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:35,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:36,026 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:36,027 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:36,036 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:36,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:36,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:36,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:36,037 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-17 14:57:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:36,488 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-17 14:57:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:36,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:36,490 INFO L225 Difference]: With dead ends: 83 [2020-09-17 14:57:36,491 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 14:57:36,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:57:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 14:57:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-17 14:57:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 14:57:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-17 14:57:36,496 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-17 14:57:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:36,496 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-17 14:57:36,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-17 14:57:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:36,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:36,497 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:36,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 14:57:36,709 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-17 14:57:36,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:36,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616880359] [2020-09-17 14:57:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:36,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616880359] [2020-09-17 14:57:36,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362679723] [2020-09-17 14:57:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:36,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:57:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:37,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:37,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:37,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:37,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1337433078] [2020-09-17 14:57:37,036 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:37,039 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:37,044 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:37,044 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:37,046 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:37,046 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:37,086 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:37,087 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:37,101 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:37,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:37,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:37,103 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-17 14:57:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:37,554 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-17 14:57:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:37,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:37,556 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:37,556 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:37,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:57:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-17 14:57:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 14:57:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-17 14:57:37,559 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-17 14:57:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:37,560 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-17 14:57:37,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-17 14:57:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:37,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:37,560 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:37,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 14:57:37,761 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-17 14:57:37,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:37,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479195874] [2020-09-17 14:57:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:37,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479195874] [2020-09-17 14:57:37,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021269309] [2020-09-17 14:57:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:37,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:37,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:37,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:37,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535855610] [2020-09-17 14:57:37,978 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:37,980 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:37,984 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:37,984 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:37,985 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:37,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:38,024 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:38,025 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:38,042 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:57:38,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:38,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:38,043 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-17 14:57:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:38,626 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-17 14:57:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:38,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:38,632 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:38,632 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:38,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:57:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-17 14:57:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 14:57:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-17 14:57:38,636 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-17 14:57:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:38,636 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-17 14:57:38,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-17 14:57:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:38,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:38,637 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:38,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:38,843 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-17 14:57:38,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:38,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626049318] [2020-09-17 14:57:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:38,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626049318] [2020-09-17 14:57:38,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010930200] [2020-09-17 14:57:38,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:39,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:57:39,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:39,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:39,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:39,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075987707] [2020-09-17 14:57:39,086 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:39,088 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:39,093 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:39,093 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:39,094 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:39,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:39,130 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:39,130 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:39,183 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:57:39,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:39,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:39,184 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-17 14:57:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:39,834 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-09-17 14:57:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:57:39,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:39,841 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:39,841 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:39,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:57:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-09-17 14:57:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:57:39,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-09-17 14:57:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:39,845 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:57:39,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:57:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:39,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:39,846 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:40,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:40,046 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:40,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:40,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-09-17 14:57:40,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:40,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7840777] [2020-09-17 14:57:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:40,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7840777] [2020-09-17 14:57:40,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098009935] [2020-09-17 14:57:40,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:40,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 14:57:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:40,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:40,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:40,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24827352] [2020-09-17 14:57:40,312 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:40,314 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:40,318 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-17 14:57:40,319 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:40,319 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,320 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,368 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,377 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,385 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,386 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,397 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,437 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:40,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:40,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:40,438 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-09-17 14:57:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:40,813 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-09-17 14:57:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:40,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:40,814 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:57:40,814 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:57:40,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:57:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 14:57:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:57:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 14:57:40,818 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-09-17 14:57:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:40,818 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 14:57:40,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 14:57:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:40,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:40,820 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:41,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 14:57:41,022 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-09-17 14:57:41,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:41,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718379013] [2020-09-17 14:57:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:41,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718379013] [2020-09-17 14:57:41,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511375292] [2020-09-17 14:57:41,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:41,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:41,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:41,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1064151574] [2020-09-17 14:57:41,271 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:41,273 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:41,277 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:41,277 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:41,278 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:41,278 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:41,323 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:41,324 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:41,333 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:41,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:41,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:41,335 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-09-17 14:57:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:41,822 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-09-17 14:57:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:41,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:41,824 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:57:41,824 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:57:41,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:57:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-09-17 14:57:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:57:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-09-17 14:57:41,828 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-09-17 14:57:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:41,828 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-09-17 14:57:41,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-09-17 14:57:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:41,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:41,829 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:42,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:42,040 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-09-17 14:57:42,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:42,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64407819] [2020-09-17 14:57:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:42,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64407819] [2020-09-17 14:57:42,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565321866] [2020-09-17 14:57:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:42,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:42,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:42,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:42,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:42,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:42,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973910727] [2020-09-17 14:57:42,288 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:42,290 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:42,294 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:42,294 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:42,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:42,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:42,338 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:42,339 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:42,348 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:42,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:42,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:42,349 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-09-17 14:57:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:42,899 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-09-17 14:57:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:42,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:42,901 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:57:42,901 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:57:42,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:57:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:57:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-09-17 14:57:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:57:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-09-17 14:57:42,905 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-09-17 14:57:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:42,906 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-09-17 14:57:42,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-09-17 14:57:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:42,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:42,907 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:43,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 14:57:43,118 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:43,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-09-17 14:57:43,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:43,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720673633] [2020-09-17 14:57:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:43,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720673633] [2020-09-17 14:57:43,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701610278] [2020-09-17 14:57:43,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:43,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 14:57:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:43,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:43,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:43,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [890942429] [2020-09-17 14:57:43,350 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:43,352 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:43,356 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:43,356 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:43,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:43,358 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:43,389 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:43,389 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:43,398 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:43,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:43,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:43,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:43,399 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-09-17 14:57:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:44,024 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-09-17 14:57:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:44,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:44,027 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:57:44,027 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:57:44,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:57:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:57:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-09-17 14:57:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 14:57:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-09-17 14:57:44,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-09-17 14:57:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:44,031 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-09-17 14:57:44,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-09-17 14:57:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:44,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:44,032 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:44,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-17 14:57:44,243 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-09-17 14:57:44,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:44,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860007692] [2020-09-17 14:57:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:44,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860007692] [2020-09-17 14:57:44,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71223839] [2020-09-17 14:57:44,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:44,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:44,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:44,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:44,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:44,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [972816995] [2020-09-17 14:57:44,541 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:44,544 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:44,549 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:44,550 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:44,553 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:44,553 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:44,597 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:44,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:44,608 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:44,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:44,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:44,609 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-09-17 14:57:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:45,273 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 14:57:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:45,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:45,275 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:57:45,275 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:57:45,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 14:57:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:57:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 14:57:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:57:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-09-17 14:57:45,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-09-17 14:57:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:45,280 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-09-17 14:57:45,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-09-17 14:57:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:45,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:45,281 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 14:57:45,489 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-09-17 14:57:45,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:45,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359060568] [2020-09-17 14:57:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:45,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359060568] [2020-09-17 14:57:45,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132797708] [2020-09-17 14:57:45,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:45,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 14:57:45,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:45,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:45,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:45,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:45,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1244228367] [2020-09-17 14:57:45,758 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:45,761 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:45,765 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:45,766 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:45,767 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:45,767 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:45,809 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:45,809 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:45,820 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:57:45,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:45,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:45,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:45,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:45,821 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-09-17 14:57:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:46,594 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 14:57:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 14:57:46,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:46,596 INFO L225 Difference]: With dead ends: 98 [2020-09-17 14:57:46,596 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:57:46,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:57:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:57:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-09-17 14:57:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 14:57:46,598 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-09-17 14:57:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:46,599 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 14:57:46,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 14:57:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:46,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:46,599 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:46,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 14:57:46,802 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-09-17 14:57:46,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:46,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686348747] [2020-09-17 14:57:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:47,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686348747] [2020-09-17 14:57:47,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693726141] [2020-09-17 14:57:47,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:47,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 14:57:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:47,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:47,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:47,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1658108954] [2020-09-17 14:57:47,097 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:47,099 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:47,105 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-09-17 14:57:47,105 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:47,110 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:47,110 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:47,147 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:47,147 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:47,160 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:47,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:47,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:47,162 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-09-17 14:57:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:47,596 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-09-17 14:57:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:47,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:47,598 INFO L225 Difference]: With dead ends: 94 [2020-09-17 14:57:47,598 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 14:57:47,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:57:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 14:57:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-09-17 14:57:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 14:57:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-09-17 14:57:47,602 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-09-17 14:57:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:47,602 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-09-17 14:57:47,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-09-17 14:57:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:47,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:47,603 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:47,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 14:57:47,814 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-09-17 14:57:47,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:47,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248873096] [2020-09-17 14:57:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:48,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248873096] [2020-09-17 14:57:48,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479768106] [2020-09-17 14:57:48,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:48,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:48,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:48,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [126131327] [2020-09-17 14:57:48,096 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:48,098 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:48,103 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:48,103 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:48,106 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:48,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:48,142 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:48,142 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:48,161 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:48,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:48,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:48,162 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-09-17 14:57:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:48,664 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-09-17 14:57:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:48,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:48,666 INFO L225 Difference]: With dead ends: 91 [2020-09-17 14:57:48,666 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 14:57:48,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:57:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 14:57:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-09-17 14:57:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 14:57:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-09-17 14:57:48,671 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-09-17 14:57:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:48,671 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-09-17 14:57:48,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-09-17 14:57:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:48,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:48,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:48,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 14:57:48,879 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-09-17 14:57:48,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:48,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074815363] [2020-09-17 14:57:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:49,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074815363] [2020-09-17 14:57:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79849211] [2020-09-17 14:57:49,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:49,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:49,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:49,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:49,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [342173630] [2020-09-17 14:57:49,145 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:49,147 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:49,151 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:49,151 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:49,153 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:49,153 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:49,190 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:49,191 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:49,206 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:49,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:49,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:49,208 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-09-17 14:57:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:49,801 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-09-17 14:57:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:49,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:49,803 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:49,803 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:49,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:57:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-09-17 14:57:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 14:57:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-09-17 14:57:49,807 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-09-17 14:57:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:49,807 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-09-17 14:57:49,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-09-17 14:57:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:49,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:49,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:50,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 14:57:50,017 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-09-17 14:57:50,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:50,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637201082] [2020-09-17 14:57:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:50,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637201082] [2020-09-17 14:57:50,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837503099] [2020-09-17 14:57:50,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:50,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 14:57:50,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:50,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:50,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:50,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525144845] [2020-09-17 14:57:50,306 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:50,308 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:50,312 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:50,313 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:50,315 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:50,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:50,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:50,360 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:50,375 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:57:50,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:50,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:50,376 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-09-17 14:57:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:50,987 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-09-17 14:57:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:50,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:50,989 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:50,989 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:57:50,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 14:57:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:57:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-09-17 14:57:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 14:57:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-09-17 14:57:50,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-09-17 14:57:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:50,993 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-09-17 14:57:50,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-09-17 14:57:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:50,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:50,994 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:51,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:51,206 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-09-17 14:57:51,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:51,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353257289] [2020-09-17 14:57:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:51,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353257289] [2020-09-17 14:57:51,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206280269] [2020-09-17 14:57:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:51,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:51,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:51,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:51,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262846971] [2020-09-17 14:57:51,465 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:51,467 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:51,472 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:51,472 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:51,474 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:51,475 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:51,509 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:51,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:51,520 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:57:51,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:51,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:51,521 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-09-17 14:57:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:52,270 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-09-17 14:57:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:52,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:52,271 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:52,272 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:57:52,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:57:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:57:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-17 14:57:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:57:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-09-17 14:57:52,276 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-09-17 14:57:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:52,276 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-09-17 14:57:52,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-09-17 14:57:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:52,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:52,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:52,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:52,487 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:52,487 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-09-17 14:57:52,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:52,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055946361] [2020-09-17 14:57:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:52,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055946361] [2020-09-17 14:57:52,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082015080] [2020-09-17 14:57:52,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:52,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 14:57:52,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:52,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:52,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:52,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1817602676] [2020-09-17 14:57:52,743 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:52,745 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:52,749 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:52,749 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:52,751 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:52,751 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:52,789 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:52,789 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:52,802 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:57:52,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:52,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:52,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:52,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:52,803 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-09-17 14:57:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:53,614 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-09-17 14:57:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 14:57:53,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:53,616 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:53,616 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:53,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:57:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:57:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:57:53,620 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-09-17 14:57:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:53,620 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:57:53,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:57:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:53,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:53,621 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:53,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:53,830 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-09-17 14:57:53,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:53,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761416341] [2020-09-17 14:57:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:54,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761416341] [2020-09-17 14:57:54,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125426799] [2020-09-17 14:57:54,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:54,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:57:54,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:54,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:54,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:54,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535391323] [2020-09-17 14:57:54,131 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:54,133 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:54,137 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-09-17 14:57:54,137 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:54,138 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,138 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,171 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,171 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,197 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,198 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,207 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,208 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,220 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,244 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,245 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,257 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,257 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,267 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:57:54,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:54,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:54,268 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-09-17 14:57:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:54,733 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-09-17 14:57:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:54,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:54,734 INFO L225 Difference]: With dead ends: 84 [2020-09-17 14:57:54,734 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:57:54,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:57:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 14:57:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:57:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 14:57:54,738 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-09-17 14:57:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:54,738 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 14:57:54,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 14:57:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:54,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:54,739 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:54,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 14:57:54,942 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-09-17 14:57:54,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:54,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351890805] [2020-09-17 14:57:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:55,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351890805] [2020-09-17 14:57:55,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561875699] [2020-09-17 14:57:55,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:55,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:55,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:55,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795459279] [2020-09-17 14:57:55,250 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:55,252 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:55,257 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:55,257 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:55,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:55,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:55,304 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:55,305 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:55,318 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:57:55,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:55,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:55,319 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-09-17 14:57:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:55,887 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-09-17 14:57:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:55,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:55,889 INFO L225 Difference]: With dead ends: 112 [2020-09-17 14:57:55,889 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 14:57:55,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:57:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 14:57:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-09-17 14:57:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 14:57:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-09-17 14:57:55,892 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-09-17 14:57:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:55,892 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-09-17 14:57:55,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-09-17 14:57:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:55,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:55,893 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:56,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:56,102 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-09-17 14:57:56,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:56,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944521609] [2020-09-17 14:57:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:56,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944521609] [2020-09-17 14:57:56,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115767192] [2020-09-17 14:57:56,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:56,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:56,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:56,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:56,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1782885793] [2020-09-17 14:57:56,394 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:56,396 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:56,400 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:56,400 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:56,402 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:56,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:56,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:56,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:56,455 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:57:56,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:56,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:56,456 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-09-17 14:57:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:57,092 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-09-17 14:57:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:57,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:57,094 INFO L225 Difference]: With dead ends: 109 [2020-09-17 14:57:57,094 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 14:57:57,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 14:57:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 14:57:57,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-09-17 14:57:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:57:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-09-17 14:57:57,098 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-09-17 14:57:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:57,099 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-09-17 14:57:57,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-09-17 14:57:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:57,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:57,100 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:57,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:57,309 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-09-17 14:57:57,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:57,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128222225] [2020-09-17 14:57:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:57,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128222225] [2020-09-17 14:57:57,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116070147] [2020-09-17 14:57:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:57,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:57:57,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:57,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:57,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [589970888] [2020-09-17 14:57:57,611 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:57,614 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:57,618 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:57,618 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:57,620 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:57,620 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:57,655 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:57,655 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:57,664 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:57:57,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:57,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:57,665 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-09-17 14:57:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:58,376 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-17 14:57:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:58,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:58,377 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:57:58,377 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:57:58,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:57:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:57:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-09-17 14:57:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 14:57:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-09-17 14:57:58,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-09-17 14:57:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:58,381 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-09-17 14:57:58,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-09-17 14:57:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:58,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:58,382 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:58,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-17 14:57:58,583 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-09-17 14:57:58,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:58,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312005158] [2020-09-17 14:57:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:58,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312005158] [2020-09-17 14:57:58,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546112975] [2020-09-17 14:57:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:58,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:58,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:58,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:58,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:58,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:58,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [776409449] [2020-09-17 14:57:58,879 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:58,881 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:58,885 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:58,885 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:58,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:58,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:58,925 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:58,926 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:58,935 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:57:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:58,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:58,936 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-09-17 14:57:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:59,726 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 14:57:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:57:59,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:59,728 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:57:59,728 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:57:59,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 14:57:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:57:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-17 14:57:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:57:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-09-17 14:57:59,733 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-09-17 14:57:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:59,733 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-09-17 14:57:59,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-09-17 14:57:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:59,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:59,734 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:59,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 14:57:59,944 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-09-17 14:57:59,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:59,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612170473] [2020-09-17 14:57:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612170473] [2020-09-17 14:58:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858734613] [2020-09-17 14:58:00,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:00,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 14:58:00,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:58:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:00,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:00,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:58:00,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038160030] [2020-09-17 14:58:00,208 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:00,210 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:00,213 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:58:00,213 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:00,216 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:00,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:00,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:00,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:00,267 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:00,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:58:00,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:00,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:58:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:58:00,268 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-09-17 14:58:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:01,151 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-09-17 14:58:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:01,152 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:58:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:01,153 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:58:01,153 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:58:01,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:58:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:58:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-09-17 14:58:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:58:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-09-17 14:58:01,157 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-09-17 14:58:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:01,157 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-09-17 14:58:01,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:58:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-09-17 14:58:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:58:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:01,158 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:01,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 14:58:01,362 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-09-17 14:58:01,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:01,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745399311] [2020-09-17 14:58:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:01,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745399311] [2020-09-17 14:58:01,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407382777] [2020-09-17 14:58:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:01,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:58:01,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:58:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:01,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:01,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:58:01,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [856488862] [2020-09-17 14:58:01,632 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:01,634 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:01,638 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:58:01,639 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:01,653 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:01,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:01,698 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:01,699 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:01,708 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:58:01,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:58:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:58:01,709 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-09-17 14:58:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:02,654 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-09-17 14:58:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 14:58:02,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:58:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:02,656 INFO L225 Difference]: With dead ends: 106 [2020-09-17 14:58:02,656 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 14:58:02,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:58:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 14:58:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-09-17 14:58:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:58:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 14:58:02,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-09-17 14:58:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:02,659 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 14:58:02,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:58:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 14:58:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:02,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:02,660 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:02,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:02,870 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-09-17 14:58:02,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:02,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980364161] [2020-09-17 14:58:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:03,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980364161] [2020-09-17 14:58:03,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238782293] [2020-09-17 14:58:03,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:03,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:03,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:03,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [588609989] [2020-09-17 14:58:03,192 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:03,194 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:03,199 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-17 14:58:03,199 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:03,202 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:03,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:03,245 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:03,245 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:03,256 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:58:03,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:03,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:03,258 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-09-17 14:58:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:03,777 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-09-17 14:58:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:58:03,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:03,779 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:58:03,779 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:58:03,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:58:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:58:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-09-17 14:58:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 14:58:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-09-17 14:58:03,783 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-09-17 14:58:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:03,783 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-09-17 14:58:03,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-09-17 14:58:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:03,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:03,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:03,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:03,993 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-09-17 14:58:03,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:03,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293737081] [2020-09-17 14:58:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:04,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293737081] [2020-09-17 14:58:04,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433806579] [2020-09-17 14:58:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:04,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:04,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:04,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:04,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [546817762] [2020-09-17 14:58:04,338 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:04,340 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:04,346 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:04,346 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:04,347 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:04,347 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:04,391 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:04,392 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:04,403 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:58:04,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:04,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:04,404 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-09-17 14:58:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:05,008 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-09-17 14:58:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:58:05,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:05,010 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:05,010 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:58:05,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 14:58:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:58:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-09-17 14:58:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 14:58:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-09-17 14:58:05,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-09-17 14:58:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:05,013 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-09-17 14:58:05,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-09-17 14:58:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:05,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:05,014 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:05,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:05,215 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-09-17 14:58:05,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:05,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172363719] [2020-09-17 14:58:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:05,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172363719] [2020-09-17 14:58:05,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105093340] [2020-09-17 14:58:05,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:05,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:58:05,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:05,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:05,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:05,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1345431610] [2020-09-17 14:58:05,530 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:05,533 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:05,538 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:05,538 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:05,545 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:05,545 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:05,588 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:05,588 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:05,600 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:58:05,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:05,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:05,602 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-09-17 14:58:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:06,280 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-09-17 14:58:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:06,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:06,281 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:58:06,281 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:58:06,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:58:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:58:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-09-17 14:58:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:58:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-09-17 14:58:06,285 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-09-17 14:58:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:06,285 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-09-17 14:58:06,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-09-17 14:58:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:06,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:06,286 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:06,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:06,487 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-09-17 14:58:06,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:06,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386668263] [2020-09-17 14:58:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:06,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386668263] [2020-09-17 14:58:06,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46783662] [2020-09-17 14:58:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:06,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:06,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:06,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:06,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:06,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075093081] [2020-09-17 14:58:06,765 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:06,767 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:06,770 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:06,770 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:06,772 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,772 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,826 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,826 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,837 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:06,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:06,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:06,838 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-09-17 14:58:07,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:07,600 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-09-17 14:58:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:07,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:07,602 INFO L225 Difference]: With dead ends: 95 [2020-09-17 14:58:07,602 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 14:58:07,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:58:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 14:58:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-09-17 14:58:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 14:58:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-09-17 14:58:07,605 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-09-17 14:58:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:07,606 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-09-17 14:58:07,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-09-17 14:58:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:07,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:07,607 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:07,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 14:58:07,816 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-09-17 14:58:07,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:07,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547562319] [2020-09-17 14:58:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:08,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547562319] [2020-09-17 14:58:08,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065386701] [2020-09-17 14:58:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:08,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 14:58:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:08,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:08,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:08,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:08,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211752732] [2020-09-17 14:58:08,115 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:08,116 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:08,120 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:08,120 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:08,122 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:08,122 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:08,168 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:08,168 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:08,179 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:08,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:08,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:08,181 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-09-17 14:58:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:09,027 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-09-17 14:58:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:09,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:09,029 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:09,029 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:09,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-09-17 14:58:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-09-17 14:58:09,033 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-09-17 14:58:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:09,033 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-09-17 14:58:09,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-09-17 14:58:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:09,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:09,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:09,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:09,235 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:09,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-09-17 14:58:09,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:09,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029949183] [2020-09-17 14:58:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:09,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029949183] [2020-09-17 14:58:09,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434983905] [2020-09-17 14:58:09,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:09,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:58:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:09,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:09,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:09,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [156854216] [2020-09-17 14:58:09,531 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:09,533 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:09,539 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:09,539 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:09,540 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:09,540 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:09,578 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:09,578 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:09,589 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:58:09,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:09,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:09,590 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-09-17 14:58:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:10,524 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-09-17 14:58:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:10,524 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:10,525 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:10,525 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:10,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-09-17 14:58:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-09-17 14:58:10,528 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-09-17 14:58:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:10,529 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-09-17 14:58:10,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-09-17 14:58:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:10,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:10,530 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:10,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 14:58:10,731 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-09-17 14:58:10,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:10,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320586763] [2020-09-17 14:58:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:10,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320586763] [2020-09-17 14:58:10,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254439467] [2020-09-17 14:58:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:10,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:10,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:10,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [643497677] [2020-09-17 14:58:10,992 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:10,994 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:10,999 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:11,000 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:11,000 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:11,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:11,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:11,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:11,045 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:58:11,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:11,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:11,047 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-09-17 14:58:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:11,936 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-09-17 14:58:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 14:58:11,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:11,937 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:11,937 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:58:11,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:58:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-09-17 14:58:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:58:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 14:58:11,941 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-09-17 14:58:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:11,941 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 14:58:11,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 14:58:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:11,941 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:12,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 14:58:12,142 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-09-17 14:58:12,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:12,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337796498] [2020-09-17 14:58:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:12,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337796498] [2020-09-17 14:58:12,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98741779] [2020-09-17 14:58:12,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:12,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:12,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:12,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:12,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881942366] [2020-09-17 14:58:12,501 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:12,502 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:12,507 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-09-17 14:58:12,507 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:12,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,542 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,543 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,564 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,564 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,578 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,579 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,590 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,590 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,634 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,645 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,653 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:58:12,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:12,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:12,655 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-09-17 14:58:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:13,190 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-09-17 14:58:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:58:13,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:13,191 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:58:13,192 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 14:58:13,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:58:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 14:58:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 14:58:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:58:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 14:58:13,195 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-09-17 14:58:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:13,196 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 14:58:13,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 14:58:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:13,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:13,196 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:13,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:13,407 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-09-17 14:58:13,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:13,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955327991] [2020-09-17 14:58:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:13,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955327991] [2020-09-17 14:58:13,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411193235] [2020-09-17 14:58:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:13,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:13,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:13,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:13,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1258765123] [2020-09-17 14:58:13,775 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:13,777 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:13,782 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:13,782 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:13,783 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:13,783 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:13,833 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:13,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:13,844 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:58:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:13,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:13,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:13,845 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-09-17 14:58:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:14,473 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-09-17 14:58:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:14,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:14,475 INFO L225 Difference]: With dead ends: 122 [2020-09-17 14:58:14,475 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 14:58:14,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:58:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 14:58:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-09-17 14:58:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 14:58:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-09-17 14:58:14,478 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-09-17 14:58:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:14,478 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-09-17 14:58:14,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-09-17 14:58:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:14,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:14,479 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:14,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 14:58:14,680 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-09-17 14:58:14,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:14,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111573430] [2020-09-17 14:58:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:14,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111573430] [2020-09-17 14:58:14,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351626236] [2020-09-17 14:58:14,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:15,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:15,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:15,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:15,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:15,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:15,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1422009515] [2020-09-17 14:58:15,036 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:15,038 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:15,043 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:15,043 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:15,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:15,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:15,088 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:15,088 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:15,097 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:58:15,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:15,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:15,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:15,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:15,099 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-09-17 14:58:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:15,828 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-09-17 14:58:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:15,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:15,830 INFO L225 Difference]: With dead ends: 119 [2020-09-17 14:58:15,830 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 14:58:15,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 14:58:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 14:58:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-09-17 14:58:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:58:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-09-17 14:58:15,834 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-09-17 14:58:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:15,834 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-09-17 14:58:15,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-09-17 14:58:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:15,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:15,835 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:16,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:16,036 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-09-17 14:58:16,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:16,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185705731] [2020-09-17 14:58:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:16,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185705731] [2020-09-17 14:58:16,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82805766] [2020-09-17 14:58:16,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:16,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:16,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:16,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:16,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:16,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1110195594] [2020-09-17 14:58:16,388 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:16,391 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:16,395 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:16,395 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:16,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:16,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:16,446 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:16,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:16,454 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:58:16,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:16,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:16,456 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-09-17 14:58:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:17,270 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-09-17 14:58:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:17,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:17,272 INFO L225 Difference]: With dead ends: 117 [2020-09-17 14:58:17,272 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 14:58:17,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:58:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 14:58:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-09-17 14:58:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:58:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-09-17 14:58:17,276 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-09-17 14:58:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:17,277 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-09-17 14:58:17,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-09-17 14:58:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:17,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:17,277 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:17,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-17 14:58:17,487 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-09-17 14:58:17,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:17,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502001179] [2020-09-17 14:58:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:17,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502001179] [2020-09-17 14:58:17,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435675712] [2020-09-17 14:58:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:17,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 14:58:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:17,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:17,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:17,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2043949995] [2020-09-17 14:58:17,822 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:17,824 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:17,828 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:17,829 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:17,829 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:17,829 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:17,869 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:17,870 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:17,880 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:58:17,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:17,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:17,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:17,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:17,882 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-09-17 14:58:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:18,781 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-09-17 14:58:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:18,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:18,785 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:58:18,785 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:58:18,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:58:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:58:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-09-17 14:58:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:58:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-09-17 14:58:18,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-09-17 14:58:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:18,789 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-09-17 14:58:18,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-09-17 14:58:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:18,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:18,789 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:18,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:18,990 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-09-17 14:58:18,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:18,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428152029] [2020-09-17 14:58:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:19,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428152029] [2020-09-17 14:58:19,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705814821] [2020-09-17 14:58:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:19,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:19,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:19,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2041588796] [2020-09-17 14:58:19,295 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:19,298 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:19,305 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:19,305 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:19,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:19,311 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:19,344 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:19,345 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:19,354 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:19,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:19,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:19,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:19,356 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-09-17 14:58:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:20,311 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-09-17 14:58:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:20,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:20,313 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:20,313 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:20,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:58:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-09-17 14:58:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:58:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-09-17 14:58:20,317 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-09-17 14:58:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:20,317 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-09-17 14:58:20,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-09-17 14:58:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:20,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:20,318 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:20,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 14:58:20,519 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-09-17 14:58:20,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:20,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718351314] [2020-09-17 14:58:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:20,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718351314] [2020-09-17 14:58:20,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022524269] [2020-09-17 14:58:20,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:20,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:20,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:20,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:20,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:20,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523605389] [2020-09-17 14:58:20,815 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:20,818 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:20,823 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:20,823 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:20,826 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:20,826 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:20,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:20,864 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:20,878 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:20,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:20,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:20,879 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-09-17 14:58:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:21,939 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 14:58:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:21,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:21,949 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:21,949 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:21,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:58:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-09-17 14:58:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:58:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-09-17 14:58:21,952 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-09-17 14:58:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:21,952 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-09-17 14:58:21,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-09-17 14:58:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:21,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:21,953 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:22,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:22,157 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-09-17 14:58:22,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:22,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061326050] [2020-09-17 14:58:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:22,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061326050] [2020-09-17 14:58:22,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63233162] [2020-09-17 14:58:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:22,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:22,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:22,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:22,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912532512] [2020-09-17 14:58:22,480 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:22,482 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:22,486 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:22,486 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:22,488 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:22,488 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:22,530 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:22,530 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:22,543 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:58:22,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:22,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:22,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:22,544 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-09-17 14:58:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:23,640 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-17 14:58:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 14:58:23,641 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:23,642 INFO L225 Difference]: With dead ends: 114 [2020-09-17 14:58:23,642 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 14:58:23,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:58:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 14:58:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-09-17 14:58:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:58:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 14:58:23,644 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-09-17 14:58:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:23,645 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 14:58:23,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 14:58:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:23,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:23,645 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:23,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 14:58:23,846 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-09-17 14:58:23,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:23,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117610991] [2020-09-17 14:58:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:24,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117610991] [2020-09-17 14:58:24,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309899872] [2020-09-17 14:58:24,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:24,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:24,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:24,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:24,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150694784] [2020-09-17 14:58:24,284 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:24,289 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:24,299 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-09-17 14:58:24,299 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:24,304 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:24,304 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:24,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:24,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:24,371 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:58:24,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:24,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:24,373 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-09-17 14:58:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:25,069 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-09-17 14:58:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:58:25,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:25,071 INFO L225 Difference]: With dead ends: 110 [2020-09-17 14:58:25,071 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 14:58:25,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:58:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 14:58:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-09-17 14:58:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:58:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-09-17 14:58:25,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-09-17 14:58:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:25,076 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-09-17 14:58:25,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-09-17 14:58:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:25,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:25,077 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:25,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:25,278 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-09-17 14:58:25,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:25,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812304373] [2020-09-17 14:58:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:25,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812304373] [2020-09-17 14:58:25,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563725999] [2020-09-17 14:58:25,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:25,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:25,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:25,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:25,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1554442351] [2020-09-17 14:58:25,677 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:25,680 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:25,687 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:25,687 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:25,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:25,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:25,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:25,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:25,753 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:58:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:25,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:25,754 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-09-17 14:58:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:26,414 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-17 14:58:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:26,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:26,415 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:58:26,415 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:58:26,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:58:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:58:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-09-17 14:58:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 14:58:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-09-17 14:58:26,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-09-17 14:58:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:26,420 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-09-17 14:58:26,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-09-17 14:58:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:26,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:26,421 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:26,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 14:58:26,627 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:26,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-09-17 14:58:26,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:26,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659670782] [2020-09-17 14:58:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:26,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659670782] [2020-09-17 14:58:26,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309128834] [2020-09-17 14:58:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:26,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 14:58:26,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:27,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:27,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:27,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1688611791] [2020-09-17 14:58:27,011 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:27,014 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:27,020 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:27,020 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:27,022 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:27,023 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:27,067 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:27,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:27,077 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:58:27,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:27,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:27,078 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-09-17 14:58:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:27,877 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 14:58:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:27,878 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:27,879 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:58:27,879 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:58:27,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:58:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-09-17 14:58:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-09-17 14:58:27,883 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-09-17 14:58:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:27,883 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-09-17 14:58:27,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-09-17 14:58:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:27,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:27,883 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:28,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-17 14:58:28,084 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-09-17 14:58:28,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:28,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697884292] [2020-09-17 14:58:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697884292] [2020-09-17 14:58:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451534401] [2020-09-17 14:58:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:28,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:28,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:28,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [417787994] [2020-09-17 14:58:28,517 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:28,524 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:28,533 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:28,533 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:28,536 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:28,536 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:28,607 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:28,607 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:28,620 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:28,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:28,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:28,622 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-09-17 14:58:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:29,562 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-09-17 14:58:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:29,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:29,564 INFO L225 Difference]: With dead ends: 103 [2020-09-17 14:58:29,564 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 14:58:29,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 14:58:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-09-17 14:58:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-09-17 14:58:29,568 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-09-17 14:58:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:29,568 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-09-17 14:58:29,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-09-17 14:58:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:29,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:29,570 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:29,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 14:58:29,771 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-09-17 14:58:29,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:29,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419688063] [2020-09-17 14:58:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:30,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419688063] [2020-09-17 14:58:30,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788819014] [2020-09-17 14:58:30,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:30,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:30,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:30,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:30,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:30,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123216382] [2020-09-17 14:58:30,124 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:30,125 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:30,130 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:30,130 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:30,132 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:30,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:30,175 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:30,175 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:30,186 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:30,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:30,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:30,188 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-09-17 14:58:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:31,176 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-09-17 14:58:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:31,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:31,178 INFO L225 Difference]: With dead ends: 101 [2020-09-17 14:58:31,178 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 14:58:31,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 14:58:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-09-17 14:58:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:58:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-09-17 14:58:31,181 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-09-17 14:58:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:31,181 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-09-17 14:58:31,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-09-17 14:58:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:31,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:31,182 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:31,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:31,383 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-09-17 14:58:31,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:31,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759324517] [2020-09-17 14:58:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:31,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759324517] [2020-09-17 14:58:31,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637102554] [2020-09-17 14:58:31,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:31,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:31,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:31,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1050601268] [2020-09-17 14:58:31,737 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:31,739 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:31,744 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:31,744 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:31,746 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:31,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:31,789 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:31,790 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:31,820 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:58:31,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:31,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:31,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:31,822 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-09-17 14:58:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:32,904 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-09-17 14:58:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:32,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:32,906 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:32,906 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:58:32,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:58:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:58:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-09-17 14:58:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:58:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-09-17 14:58:32,910 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-09-17 14:58:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:32,910 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-09-17 14:58:32,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-09-17 14:58:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:32,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:32,911 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:33,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:33,122 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-09-17 14:58:33,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:33,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893536798] [2020-09-17 14:58:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:33,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893536798] [2020-09-17 14:58:33,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005467692] [2020-09-17 14:58:33,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:33,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:33,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:33,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:33,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426426208] [2020-09-17 14:58:33,525 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:33,527 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:33,537 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:33,537 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:33,540 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,540 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,593 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,608 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:58:33,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:33,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:33,609 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-09-17 14:58:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:34,814 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-09-17 14:58:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:34,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:34,815 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:34,815 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:58:34,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:58:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:58:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-09-17 14:58:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:58:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-09-17 14:58:34,819 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-09-17 14:58:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:34,820 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-09-17 14:58:34,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-09-17 14:58:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:34,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:34,820 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:35,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:35,026 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-09-17 14:58:35,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:35,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041801786] [2020-09-17 14:58:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:35,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041801786] [2020-09-17 14:58:35,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982991284] [2020-09-17 14:58:35,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:35,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:35,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:35,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:35,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1511938581] [2020-09-17 14:58:35,375 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:35,376 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:35,397 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:35,397 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:35,399 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:35,400 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:35,441 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:35,442 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:35,452 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 14:58:35,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:35,454 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-09-17 14:58:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:36,698 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-09-17 14:58:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 14:58:36,699 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:36,700 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:36,700 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:36,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:58:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-09-17 14:58:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:58:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 14:58:36,702 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-09-17 14:58:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:36,703 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 14:58:36,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 14:58:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:36,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:36,703 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:36,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-17 14:58:36,904 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-09-17 14:58:36,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:36,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733561839] [2020-09-17 14:58:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:37,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733561839] [2020-09-17 14:58:37,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183290108] [2020-09-17 14:58:37,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:37,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:37,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:37,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:37,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1439461248] [2020-09-17 14:58:37,308 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:37,310 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:37,316 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-09-17 14:58:37,316 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:37,316 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,366 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,367 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,396 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,396 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,403 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,411 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,425 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,426 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,448 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,457 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:37,457 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:37,463 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:58:37,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:37,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:37,464 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-09-17 14:58:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:38,108 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-09-17 14:58:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:38,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:38,109 INFO L225 Difference]: With dead ends: 96 [2020-09-17 14:58:38,110 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 14:58:38,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:58:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 14:58:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 14:58:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:58:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 14:58:38,113 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-09-17 14:58:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:38,113 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 14:58:38,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 14:58:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:38,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:38,114 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:38,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:38,322 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-09-17 14:58:38,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:38,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461161847] [2020-09-17 14:58:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:38,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461161847] [2020-09-17 14:58:38,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66673798] [2020-09-17 14:58:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:38,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:38,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:38,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323349623] [2020-09-17 14:58:38,749 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:38,764 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:38,769 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:38,769 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:38,772 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:38,772 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:38,816 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:38,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:38,826 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:58:38,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:38,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:38,828 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-09-17 14:58:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:39,594 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-09-17 14:58:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:39,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:39,596 INFO L225 Difference]: With dead ends: 132 [2020-09-17 14:58:39,597 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 14:58:39,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:58:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 14:58:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-09-17 14:58:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:58:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-09-17 14:58:39,601 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-09-17 14:58:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:39,601 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-09-17 14:58:39,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-09-17 14:58:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:39,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:39,602 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:39,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:39,812 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-09-17 14:58:39,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:39,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666745646] [2020-09-17 14:58:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:40,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666745646] [2020-09-17 14:58:40,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206042493] [2020-09-17 14:58:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:40,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:40,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:40,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:40,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2073564266] [2020-09-17 14:58:40,206 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:40,207 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:40,212 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:40,213 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:40,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:40,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:40,255 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:40,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:40,267 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:58:40,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:40,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:40,268 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-09-17 14:58:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:41,119 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-09-17 14:58:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:41,120 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:41,121 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:58:41,121 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:58:41,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:58:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:58:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-09-17 14:58:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:58:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-09-17 14:58:41,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-09-17 14:58:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:41,125 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-09-17 14:58:41,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-09-17 14:58:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:41,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:41,126 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:41,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:41,327 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-09-17 14:58:41,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:41,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579119992] [2020-09-17 14:58:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:41,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579119992] [2020-09-17 14:58:41,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255493706] [2020-09-17 14:58:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:41,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:58:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:41,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:41,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:41,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:41,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [415892046] [2020-09-17 14:58:41,730 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:41,732 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:41,737 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:41,737 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:41,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:41,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:41,781 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:41,781 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:41,793 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:58:41,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:41,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:41,794 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-09-17 14:58:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:42,739 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-09-17 14:58:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:42,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:42,741 INFO L225 Difference]: With dead ends: 127 [2020-09-17 14:58:42,741 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 14:58:42,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:58:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 14:58:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-09-17 14:58:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:58:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-09-17 14:58:42,745 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-09-17 14:58:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:42,745 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-09-17 14:58:42,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-09-17 14:58:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:42,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:42,746 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:42,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 14:58:42,956 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-09-17 14:58:42,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:42,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542312593] [2020-09-17 14:58:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:43,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542312593] [2020-09-17 14:58:43,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63292858] [2020-09-17 14:58:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:43,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:43,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:43,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:43,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:43,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:43,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1922681373] [2020-09-17 14:58:43,341 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:43,343 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:43,348 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:43,348 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:43,349 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:43,349 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:43,390 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:43,391 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:43,401 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:58:43,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:43,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:43,402 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-09-17 14:58:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:44,430 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-09-17 14:58:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:44,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:44,432 INFO L225 Difference]: With dead ends: 125 [2020-09-17 14:58:44,432 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 14:58:44,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:58:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 14:58:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-09-17 14:58:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:58:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-09-17 14:58:44,435 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-09-17 14:58:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:44,436 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-09-17 14:58:44,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-09-17 14:58:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:44,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:44,436 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:44,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:44,637 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-09-17 14:58:44,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:44,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096942150] [2020-09-17 14:58:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:44,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096942150] [2020-09-17 14:58:44,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007930395] [2020-09-17 14:58:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:44,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:58:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:45,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:45,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:45,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:45,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:45,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876240074] [2020-09-17 14:58:45,020 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:45,022 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:45,028 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:45,028 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:45,030 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:45,030 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:45,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:45,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:45,083 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:45,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:45,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:45,085 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-09-17 14:58:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:46,202 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-09-17 14:58:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:46,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:46,204 INFO L225 Difference]: With dead ends: 123 [2020-09-17 14:58:46,204 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 14:58:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:58:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 14:58:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-09-17 14:58:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:58:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-09-17 14:58:46,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-09-17 14:58:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:46,208 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-09-17 14:58:46,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-09-17 14:58:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:46,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:46,208 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:46,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:46,417 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-09-17 14:58:46,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:46,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283960361] [2020-09-17 14:58:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:46,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283960361] [2020-09-17 14:58:46,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744519255] [2020-09-17 14:58:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:46,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:46,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:46,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:46,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [908136926] [2020-09-17 14:58:46,776 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:46,777 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:46,783 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:46,783 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:46,785 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:46,785 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:46,834 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:46,835 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:46,864 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:46,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:46,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:46,865 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-09-17 14:58:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:48,069 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-09-17 14:58:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:58:48,070 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:48,071 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:58:48,071 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:58:48,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 14:58:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:58:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-09-17 14:58:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 14:58:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-09-17 14:58:48,073 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-09-17 14:58:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:48,074 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-09-17 14:58:48,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-09-17 14:58:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:48,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:48,074 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:48,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-17 14:58:48,275 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-09-17 14:58:48,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:48,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41079670] [2020-09-17 14:58:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:48,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41079670] [2020-09-17 14:58:48,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806032330] [2020-09-17 14:58:48,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:48,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:48,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:48,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276915602] [2020-09-17 14:58:48,644 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:48,646 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:48,652 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:48,652 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:48,653 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:48,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:48,698 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:48,698 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:48,710 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:58:48,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:48,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:48,711 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-09-17 14:58:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:50,011 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-09-17 14:58:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:58:50,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:50,013 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:58:50,013 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:58:50,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:58:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:58:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-09-17 14:58:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 14:58:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-09-17 14:58:50,016 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-09-17 14:58:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:50,016 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-09-17 14:58:50,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-09-17 14:58:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:50,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:50,017 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:50,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:50,218 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-09-17 14:58:50,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:50,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443171893] [2020-09-17 14:58:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:50,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443171893] [2020-09-17 14:58:50,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434382631] [2020-09-17 14:58:50,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:50,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:50,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:50,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:50,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1506409205] [2020-09-17 14:58:50,607 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:50,612 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:50,621 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:50,621 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:50,626 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:50,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:50,671 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:50,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:50,685 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:58:50,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:50,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:50,687 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-09-17 14:58:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:52,051 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-09-17 14:58:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 14:58:52,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:52,053 INFO L225 Difference]: With dead ends: 122 [2020-09-17 14:58:52,053 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 14:58:52,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 14:58:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 14:58:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-09-17 14:58:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:58:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 14:58:52,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-09-17 14:58:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:52,055 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 14:58:52,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 14:58:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:52,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:52,057 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:52,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:52,266 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-09-17 14:58:52,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:52,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010169132] [2020-09-17 14:58:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:52,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010169132] [2020-09-17 14:58:52,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848937971] [2020-09-17 14:58:52,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:52,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:58:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:52,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:52,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:52,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [972623960] [2020-09-17 14:58:52,780 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:52,782 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:52,788 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-09-17 14:58:52,789 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:52,789 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:52,789 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:52,839 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:52,840 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:52,858 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:58:52,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:52,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:52,859 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-09-17 14:58:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:53,619 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-09-17 14:58:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:53,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:53,621 INFO L225 Difference]: With dead ends: 118 [2020-09-17 14:58:53,621 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 14:58:53,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 14:58:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-09-17 14:58:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-09-17 14:58:53,623 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-09-17 14:58:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:53,623 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-09-17 14:58:53,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-09-17 14:58:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:53,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:53,624 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:53,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:53,825 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:53,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-09-17 14:58:53,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:53,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968697007] [2020-09-17 14:58:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:54,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968697007] [2020-09-17 14:58:54,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210037174] [2020-09-17 14:58:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:54,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:54,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:54,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:54,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304864651] [2020-09-17 14:58:54,274 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:54,276 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:54,282 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:54,282 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:54,283 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:54,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:54,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:54,329 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:54,341 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:58:54,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:54,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:54,342 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-09-17 14:58:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:55,168 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-09-17 14:58:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:55,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:55,170 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:58:55,170 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:58:55,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:58:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-09-17 14:58:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-09-17 14:58:55,173 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-09-17 14:58:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:55,174 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-09-17 14:58:55,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-09-17 14:58:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:55,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:55,174 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:55,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:55,375 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-09-17 14:58:55,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:55,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838811020] [2020-09-17 14:58:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:55,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838811020] [2020-09-17 14:58:55,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101096235] [2020-09-17 14:58:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:55,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:58:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:55,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:55,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:55,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:55,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134504416] [2020-09-17 14:58:55,808 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:55,810 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:55,816 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:55,816 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:55,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:55,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:55,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:55,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:55,881 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:58:55,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:55,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:55,882 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-09-17 14:58:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:56,810 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-09-17 14:58:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:56,811 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:56,812 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:56,812 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:56,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-09-17 14:58:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:58:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-09-17 14:58:56,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-09-17 14:58:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:56,816 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-09-17 14:58:56,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-09-17 14:58:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:56,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:56,817 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:57,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:57,029 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-09-17 14:58:57,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:57,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806166864] [2020-09-17 14:58:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:57,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806166864] [2020-09-17 14:58:57,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573506201] [2020-09-17 14:58:57,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:57,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:57,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:57,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:57,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:57,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [880842858] [2020-09-17 14:58:57,451 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:57,453 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:57,459 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:57,460 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:57,461 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:57,461 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:57,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:57,509 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:57,521 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:58:57,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:57,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:57,523 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-09-17 14:58:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:58,535 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-09-17 14:58:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:58,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:58,537 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:58:58,537 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:58:58,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:58:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:58:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-09-17 14:58:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:58:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-09-17 14:58:58,540 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-09-17 14:58:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:58,541 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-09-17 14:58:58,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-09-17 14:58:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:58,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:58,542 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:58,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:58,743 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-09-17 14:58:58,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:58,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313662336] [2020-09-17 14:58:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:59,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313662336] [2020-09-17 14:58:59,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785484925] [2020-09-17 14:58:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:59,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:59,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:59,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1698118523] [2020-09-17 14:58:59,178 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:59,180 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:59,186 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:59,186 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:59,188 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:59,188 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:59,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:59,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:59,270 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:58:59,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:59,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:59,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:59,271 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-09-17 14:59:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:00,397 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-09-17 14:59:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:00,397 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:00,398 INFO L225 Difference]: With dead ends: 109 [2020-09-17 14:59:00,399 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 14:59:00,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:59:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 14:59:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-09-17 14:59:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:59:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-09-17 14:59:00,402 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-09-17 14:59:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:00,402 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-09-17 14:59:00,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-09-17 14:59:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:00,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:00,402 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:00,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 14:59:00,604 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-09-17 14:59:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:00,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176694712] [2020-09-17 14:59:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:00,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176694712] [2020-09-17 14:59:00,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516597023] [2020-09-17 14:59:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:00,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:01,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:01,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:01,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1284015371] [2020-09-17 14:59:01,020 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:01,023 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:01,031 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:01,032 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:01,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:01,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:01,076 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:01,077 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:01,088 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:59:01,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:01,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:01,089 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-09-17 14:59:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:02,324 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-09-17 14:59:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:02,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:02,326 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:59:02,327 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:59:02,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:59:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:59:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-09-17 14:59:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 14:59:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-09-17 14:59:02,331 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-09-17 14:59:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:02,331 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-09-17 14:59:02,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-09-17 14:59:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:02,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:02,332 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:02,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:02,543 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-09-17 14:59:02,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46071932] [2020-09-17 14:59:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:02,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46071932] [2020-09-17 14:59:02,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904454422] [2020-09-17 14:59:02,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:59:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:02,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:02,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:02,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [823806657] [2020-09-17 14:59:02,971 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:02,974 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:02,982 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:02,983 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:02,986 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:02,986 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:03,025 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:03,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:03,036 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:59:03,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:03,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:03,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:03,037 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-09-17 14:59:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:04,373 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-09-17 14:59:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:04,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:04,375 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:04,375 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:04,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 14:59:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-09-17 14:59:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 14:59:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-09-17 14:59:04,379 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-09-17 14:59:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:04,379 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-09-17 14:59:04,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-09-17 14:59:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:04,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:04,380 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:04,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 14:59:04,586 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-09-17 14:59:04,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:04,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879157502] [2020-09-17 14:59:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:04,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879157502] [2020-09-17 14:59:04,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413318401] [2020-09-17 14:59:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:04,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:05,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:05,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:05,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111857485] [2020-09-17 14:59:05,043 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:05,048 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:05,060 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:05,060 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:05,067 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:05,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:05,123 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:05,123 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:05,139 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 14:59:05,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:05,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:05,140 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-09-17 14:59:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:06,617 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-09-17 14:59:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:06,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:06,628 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:06,628 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:06,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 14:59:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-09-17 14:59:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 14:59:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-09-17 14:59:06,632 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-09-17 14:59:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:06,632 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-09-17 14:59:06,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-09-17 14:59:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:06,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:06,633 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:06,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-17 14:59:06,844 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-09-17 14:59:06,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:06,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707524911] [2020-09-17 14:59:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:07,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707524911] [2020-09-17 14:59:07,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924403194] [2020-09-17 14:59:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:07,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:59:07,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:07,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:07,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:07,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [765329590] [2020-09-17 14:59:07,276 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:07,278 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:07,285 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:07,285 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:07,287 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:07,287 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:07,334 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:07,334 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:07,346 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 14:59:07,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:07,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:07,348 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-09-17 14:59:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:08,856 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-09-17 14:59:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 14:59:08,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:08,858 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:08,858 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:59:08,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 14:59:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:59:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-09-17 14:59:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:59:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 14:59:08,861 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-09-17 14:59:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:08,862 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 14:59:08,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 14:59:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:08,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:08,862 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:09,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:09,063 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-09-17 14:59:09,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:09,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847990244] [2020-09-17 14:59:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:09,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847990244] [2020-09-17 14:59:09,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275441639] [2020-09-17 14:59:09,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:09,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:09,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:09,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:09,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1113965537] [2020-09-17 14:59:09,575 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:09,578 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:09,586 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-09-17 14:59:09,587 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:09,589 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,590 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,649 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,650 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,654 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,654 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,666 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,666 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,673 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,673 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,697 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,697 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,702 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,702 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,712 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:59:09,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:09,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:09,713 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-09-17 14:59:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:10,486 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-09-17 14:59:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:59:10,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:10,488 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:59:10,488 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:59:10,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:59:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:59:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 14:59:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:59:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 14:59:10,492 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-09-17 14:59:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:10,492 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 14:59:10,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 14:59:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:10,493 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:10,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:10,698 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-09-17 14:59:10,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:10,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492503488] [2020-09-17 14:59:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:11,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492503488] [2020-09-17 14:59:11,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364516057] [2020-09-17 14:59:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:11,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:11,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:11,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:11,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1792507584] [2020-09-17 14:59:11,204 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:11,207 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:11,220 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:11,221 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:11,231 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:11,231 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:11,272 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:11,273 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:11,281 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:59:11,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:11,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:11,282 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-09-17 14:59:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:12,177 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-09-17 14:59:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:12,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:12,180 INFO L225 Difference]: With dead ends: 142 [2020-09-17 14:59:12,180 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 14:59:12,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:59:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 14:59:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-09-17 14:59:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:59:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-09-17 14:59:12,183 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-09-17 14:59:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:12,183 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-09-17 14:59:12,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-09-17 14:59:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:12,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:12,184 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:12,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:12,385 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-09-17 14:59:12,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:12,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418012093] [2020-09-17 14:59:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418012093] [2020-09-17 14:59:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358820782] [2020-09-17 14:59:12,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:12,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:12,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:12,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [583008097] [2020-09-17 14:59:12,876 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:12,879 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:12,887 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:12,888 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:12,894 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:12,895 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:12,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:12,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:12,957 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:59:12,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:12,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:12,958 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-09-17 14:59:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:13,954 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-09-17 14:59:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:13,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:13,956 INFO L225 Difference]: With dead ends: 139 [2020-09-17 14:59:13,956 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 14:59:13,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:59:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 14:59:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-09-17 14:59:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:59:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-09-17 14:59:13,959 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-09-17 14:59:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:13,960 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-09-17 14:59:13,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-09-17 14:59:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:13,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:13,960 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:14,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-17 14:59:14,169 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-09-17 14:59:14,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:14,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421258901] [2020-09-17 14:59:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:14,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421258901] [2020-09-17 14:59:14,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665305859] [2020-09-17 14:59:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:14,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:14,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:14,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1910116718] [2020-09-17 14:59:14,645 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:14,647 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:14,655 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:14,655 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:14,659 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:14,659 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:14,705 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:14,705 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:14,715 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:59:14,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:14,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:14,717 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-09-17 14:59:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:15,805 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-09-17 14:59:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:15,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:15,807 INFO L225 Difference]: With dead ends: 137 [2020-09-17 14:59:15,807 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 14:59:15,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:59:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 14:59:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-09-17 14:59:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:59:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-09-17 14:59:15,810 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-09-17 14:59:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:15,811 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-09-17 14:59:15,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-09-17 14:59:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:15,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:15,811 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:16,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:16,012 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-09-17 14:59:16,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:16,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451023404] [2020-09-17 14:59:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:16,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451023404] [2020-09-17 14:59:16,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007750539] [2020-09-17 14:59:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:16,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:16,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:16,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:16,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:16,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [643331640] [2020-09-17 14:59:16,479 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:16,482 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:16,490 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:16,490 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:16,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:16,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:16,543 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:16,544 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:16,552 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:59:16,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:16,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:16,553 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-09-17 14:59:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:17,782 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-09-17 14:59:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:17,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:17,785 INFO L225 Difference]: With dead ends: 135 [2020-09-17 14:59:17,785 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 14:59:17,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 14:59:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 14:59:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-09-17 14:59:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 14:59:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-09-17 14:59:17,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-09-17 14:59:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:17,789 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-09-17 14:59:17,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-09-17 14:59:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:17,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:17,790 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:17,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 14:59:17,991 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-09-17 14:59:17,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:17,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643149474] [2020-09-17 14:59:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:18,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643149474] [2020-09-17 14:59:18,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986237055] [2020-09-17 14:59:18,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:18,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:18,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:18,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:18,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015107357] [2020-09-17 14:59:18,447 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:18,449 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:18,456 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:18,456 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:18,459 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:18,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:18,509 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:18,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:18,519 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:59:18,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:18,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:18,520 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-09-17 14:59:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:19,806 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-09-17 14:59:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:19,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:19,808 INFO L225 Difference]: With dead ends: 133 [2020-09-17 14:59:19,809 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 14:59:19,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:59:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 14:59:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-09-17 14:59:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 14:59:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-09-17 14:59:19,813 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-09-17 14:59:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:19,813 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-09-17 14:59:19,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-09-17 14:59:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:19,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:19,814 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:20,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:20,024 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-09-17 14:59:20,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:20,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239881232] [2020-09-17 14:59:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:20,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239881232] [2020-09-17 14:59:20,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435668390] [2020-09-17 14:59:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:20,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:20,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:20,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:20,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511535408] [2020-09-17 14:59:20,465 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:20,467 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:20,473 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:20,473 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:20,474 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:20,474 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:20,521 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:20,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:20,532 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:59:20,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:20,533 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-09-17 14:59:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:21,916 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-09-17 14:59:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:21,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:21,918 INFO L225 Difference]: With dead ends: 131 [2020-09-17 14:59:21,918 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 14:59:21,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 14:59:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 14:59:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 14:59:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 14:59:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-09-17 14:59:21,921 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-09-17 14:59:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:21,921 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-09-17 14:59:21,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-09-17 14:59:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:21,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:21,922 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:22,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:22,129 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-09-17 14:59:22,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:22,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362322235] [2020-09-17 14:59:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:22,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362322235] [2020-09-17 14:59:22,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096453659] [2020-09-17 14:59:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:22,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:22,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:22,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:22,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1839666618] [2020-09-17 14:59:22,593 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:22,597 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:22,609 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:22,609 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:22,615 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:22,615 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:22,669 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:22,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:22,697 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:59:22,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:22,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:22,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:22,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:22,698 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-09-17 14:59:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:24,142 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-09-17 14:59:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 14:59:24,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:24,144 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:59:24,144 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:59:24,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 14:59:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:59:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-09-17 14:59:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 14:59:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-09-17 14:59:24,148 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-09-17 14:59:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:24,148 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-09-17 14:59:24,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-09-17 14:59:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:24,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:24,149 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:24,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-17 14:59:24,350 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:24,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-09-17 14:59:24,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:24,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967817185] [2020-09-17 14:59:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:24,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967817185] [2020-09-17 14:59:24,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019674715] [2020-09-17 14:59:24,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:24,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:24,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:24,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:24,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:24,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [642800981] [2020-09-17 14:59:24,793 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:24,794 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:24,800 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:24,801 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:24,801 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:24,801 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:24,849 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:24,849 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:24,861 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:59:24,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:24,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:24,863 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-09-17 14:59:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:26,435 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-17 14:59:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 14:59:26,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:26,437 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:59:26,438 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:59:26,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:59:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:59:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-09-17 14:59:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 14:59:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-09-17 14:59:26,442 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-09-17 14:59:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:26,442 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-09-17 14:59:26,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-09-17 14:59:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:26,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:26,443 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:26,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-17 14:59:26,653 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-09-17 14:59:26,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:26,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649757800] [2020-09-17 14:59:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:26,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649757800] [2020-09-17 14:59:26,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229256198] [2020-09-17 14:59:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:27,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:27,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:27,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:27,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1928764345] [2020-09-17 14:59:27,105 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:27,107 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:27,114 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:27,114 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:27,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:27,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:27,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:27,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:27,181 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 14:59:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:27,182 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-09-17 14:59:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:28,808 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-17 14:59:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 14:59:28,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:28,810 INFO L225 Difference]: With dead ends: 130 [2020-09-17 14:59:28,810 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 14:59:28,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 14:59:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 14:59:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-09-17 14:59:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:59:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 14:59:28,814 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-09-17 14:59:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:28,814 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 14:59:28,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 14:59:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:28,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:28,815 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:29,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:29,024 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-09-17 14:59:29,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:29,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347232475] [2020-09-17 14:59:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:29,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347232475] [2020-09-17 14:59:29,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046878386] [2020-09-17 14:59:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:29,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:29,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:29,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:29,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:29,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1886071022] [2020-09-17 14:59:29,594 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:29,597 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:29,606 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-09-17 14:59:29,606 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:29,608 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:29,608 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:29,659 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:29,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:29,674 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:59:29,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:29,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:29,676 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-09-17 14:59:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:30,545 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-09-17 14:59:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:59:30,546 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:30,547 INFO L225 Difference]: With dead ends: 126 [2020-09-17 14:59:30,548 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 14:59:30,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:59:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 14:59:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-09-17 14:59:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:59:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-17 14:59:30,551 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-09-17 14:59:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:30,551 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-17 14:59:30,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-17 14:59:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:30,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:30,552 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:30,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 14:59:30,757 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-09-17 14:59:30,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:30,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676246136] [2020-09-17 14:59:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:31,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676246136] [2020-09-17 14:59:31,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925758670] [2020-09-17 14:59:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:31,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:31,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:31,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:31,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1622846882] [2020-09-17 14:59:31,300 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:31,302 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:31,309 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:31,309 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:31,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:31,310 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:31,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:31,360 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:31,372 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:59:31,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:31,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:31,374 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-09-17 14:59:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:32,362 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-09-17 14:59:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:32,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:32,364 INFO L225 Difference]: With dead ends: 123 [2020-09-17 14:59:32,364 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 14:59:32,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:59:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 14:59:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 14:59:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:59:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-09-17 14:59:32,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-09-17 14:59:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:32,368 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-09-17 14:59:32,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-09-17 14:59:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:32,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:32,369 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:32,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-17 14:59:32,580 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-09-17 14:59:32,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:32,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951474068] [2020-09-17 14:59:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:33,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951474068] [2020-09-17 14:59:33,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010452369] [2020-09-17 14:59:33,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:33,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:33,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:33,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:33,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:33,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [753573231] [2020-09-17 14:59:33,108 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:33,111 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:33,118 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:33,118 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:33,120 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:33,120 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:33,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:33,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:33,190 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:59:33,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:33,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:33,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:33,192 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-09-17 14:59:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:34,275 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-09-17 14:59:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:34,276 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:34,277 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:59:34,277 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:59:34,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:59:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:59:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 14:59:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:59:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-09-17 14:59:34,280 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-09-17 14:59:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:34,280 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-09-17 14:59:34,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-09-17 14:59:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:34,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:34,281 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:34,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 14:59:34,482 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-09-17 14:59:34,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:34,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128230470] [2020-09-17 14:59:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:34,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128230470] [2020-09-17 14:59:34,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772082398] [2020-09-17 14:59:34,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:34,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:34,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:34,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [207598816] [2020-09-17 14:59:34,970 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:34,972 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:34,979 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:34,979 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:34,980 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:34,980 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:35,030 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:35,031 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:35,043 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 14:59:35,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:35,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:35,045 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-09-17 14:59:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:36,230 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-09-17 14:59:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:36,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:36,231 INFO L225 Difference]: With dead ends: 119 [2020-09-17 14:59:36,231 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 14:59:36,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:59:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 14:59:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 14:59:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 14:59:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-09-17 14:59:36,235 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-09-17 14:59:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:36,235 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-09-17 14:59:36,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-09-17 14:59:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:36,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:36,236 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:36,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:36,440 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-09-17 14:59:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:36,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465085061] [2020-09-17 14:59:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:36,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465085061] [2020-09-17 14:59:36,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37203590] [2020-09-17 14:59:36,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:36,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:36,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:36,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:36,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [944363484] [2020-09-17 14:59:36,938 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:36,939 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:36,947 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:36,948 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:36,948 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:36,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:36,999 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:37,000 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:37,013 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 14:59:37,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:37,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:37,015 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-09-17 14:59:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:38,321 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-17 14:59:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:38,322 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:38,323 INFO L225 Difference]: With dead ends: 117 [2020-09-17 14:59:38,323 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 14:59:38,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 14:59:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 14:59:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-09-17 14:59:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 14:59:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-09-17 14:59:38,326 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-09-17 14:59:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:38,327 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-09-17 14:59:38,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-09-17 14:59:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:38,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:38,327 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:38,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 14:59:38,528 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-09-17 14:59:38,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:38,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160643502] [2020-09-17 14:59:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:38,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160643502] [2020-09-17 14:59:38,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243608664] [2020-09-17 14:59:38,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:38,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:39,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:39,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:39,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730159882] [2020-09-17 14:59:39,017 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:39,018 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:39,024 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:39,025 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:39,026 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:39,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:39,075 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:39,076 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:39,112 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 14:59:39,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:39,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:39,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:39,113 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-09-17 14:59:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:40,520 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-09-17 14:59:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:40,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:40,522 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:59:40,522 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:59:40,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 14:59:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:59:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-09-17 14:59:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 14:59:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-09-17 14:59:40,524 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-09-17 14:59:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:40,524 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-09-17 14:59:40,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-09-17 14:59:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:40,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:40,525 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:40,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-17 14:59:40,726 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:40,727 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-09-17 14:59:40,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:40,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841378250] [2020-09-17 14:59:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:41,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841378250] [2020-09-17 14:59:41,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478028385] [2020-09-17 14:59:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:41,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:41,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:41,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:41,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1006523110] [2020-09-17 14:59:41,196 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:41,197 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:41,204 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:41,204 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:41,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:41,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:41,254 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:41,255 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:41,270 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 14:59:41,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:41,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:41,271 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-09-17 14:59:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:42,786 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-09-17 14:59:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:42,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:42,788 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:59:42,788 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:59:42,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 14:59:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:59:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-09-17 14:59:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 14:59:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-09-17 14:59:42,791 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-09-17 14:59:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:42,792 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-09-17 14:59:42,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-09-17 14:59:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:42,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:42,792 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:42,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 14:59:42,993 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-09-17 14:59:42,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:42,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144548790] [2020-09-17 14:59:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:43,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144548790] [2020-09-17 14:59:43,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912164443] [2020-09-17 14:59:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:43,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:43,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:43,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:43,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1516514006] [2020-09-17 14:59:43,471 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:43,473 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:43,480 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:43,480 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:43,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:43,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:43,530 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:43,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:43,544 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 14:59:43,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:43,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:43,546 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-09-17 14:59:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:45,222 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-09-17 14:59:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 14:59:45,223 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:45,224 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:45,225 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:59:45,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 14:59:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:59:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-17 14:59:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 14:59:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-09-17 14:59:45,228 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-09-17 14:59:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:45,228 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-09-17 14:59:45,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-09-17 14:59:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:45,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:45,229 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:45,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:45,438 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-09-17 14:59:45,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:45,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702008975] [2020-09-17 14:59:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702008975] [2020-09-17 14:59:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821959706] [2020-09-17 14:59:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:45,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:45,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:45,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:45,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424633915] [2020-09-17 14:59:45,932 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:45,934 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:45,946 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:45,946 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:45,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:45,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:46,020 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:46,021 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:46,032 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 14:59:46,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:46,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:46,034 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-09-17 14:59:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:47,769 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-09-17 14:59:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 14:59:47,770 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:47,771 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:47,771 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:59:47,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 14:59:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:59:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-09-17 14:59:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 14:59:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-09-17 14:59:47,774 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-09-17 14:59:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:47,774 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-09-17 14:59:47,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-09-17 14:59:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:47,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:47,775 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:47,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:47,982 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-09-17 14:59:47,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:47,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546055199] [2020-09-17 14:59:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:48,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546055199] [2020-09-17 14:59:48,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5598903] [2020-09-17 14:59:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:48,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:48,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:48,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508693841] [2020-09-17 14:59:48,472 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:48,475 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:48,483 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:48,484 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:48,485 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:48,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:48,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:48,534 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:48,555 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 14:59:48,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:48,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:48,556 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-09-17 14:59:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:50,350 INFO L93 Difference]: Finished difference Result 111 states and 283 transitions. [2020-09-17 14:59:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 14:59:50,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:50,351 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:50,351 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:50,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1332, Invalid=2958, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 14:59:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-17 14:59:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:59:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 14:59:50,354 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2020-09-17 14:59:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 14:59:50,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 14:59:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:50,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:50,355 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:50,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:50,565 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 110 times [2020-09-17 14:59:50,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:50,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482640013] [2020-09-17 14:59:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:51,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482640013] [2020-09-17 14:59:51,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013544955] [2020-09-17 14:59:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:51,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:51,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:51,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:51,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:51,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [239192110] [2020-09-17 14:59:51,167 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:51,169 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:51,177 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-09-17 14:59:51,178 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:51,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,180 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,223 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,223 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,252 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,252 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,277 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,277 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,282 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,282 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,316 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,325 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:51,326 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:51,335 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39943#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 14:59:51,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:51,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:51,336 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 26 states. [2020-09-17 14:59:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:52,316 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2020-09-17 14:59:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:52,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:52,318 INFO L225 Difference]: With dead ends: 108 [2020-09-17 14:59:52,318 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 14:59:52,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1664, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:59:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 14:59:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-17 14:59:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:59:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 14:59:52,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 29 [2020-09-17 14:59:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:52,321 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 14:59:52,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 14:59:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:52,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:52,322 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:52,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 14:59:52,526 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 111 times [2020-09-17 14:59:52,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:52,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890268612] [2020-09-17 14:59:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:53,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890268612] [2020-09-17 14:59:53,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562745164] [2020-09-17 14:59:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:53,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 14:59:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:53,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:53,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:53,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354876199] [2020-09-17 14:59:53,126 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:53,128 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:53,135 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 14:59:53,135 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:53,138 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:53,138 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:53,193 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:53,193 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:53,203 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40363#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 14:59:53,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:53,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:53,205 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 26 states. [2020-09-17 14:59:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:54,298 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2020-09-17 14:59:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:54,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:54,300 INFO L225 Difference]: With dead ends: 152 [2020-09-17 14:59:54,301 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 14:59:54,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=749, Invalid=2007, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:59:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 14:59:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2020-09-17 14:59:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:59:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2020-09-17 14:59:54,304 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 29 [2020-09-17 14:59:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:54,304 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2020-09-17 14:59:54,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2020-09-17 14:59:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:54,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:54,305 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:54,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-17 14:59:54,507 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 112 times [2020-09-17 14:59:54,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:54,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186515115] [2020-09-17 14:59:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:54,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186515115] [2020-09-17 14:59:54,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110873529] [2020-09-17 14:59:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:55,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:55,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:55,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:55,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1249706845] [2020-09-17 14:59:55,085 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:55,087 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:55,096 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 14:59:55,097 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:55,100 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:55,100 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:55,153 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:55,154 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:55,169 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40839#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 14:59:55,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:55,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:55,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:55,170 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand 26 states. [2020-09-17 14:59:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:56,365 INFO L93 Difference]: Finished difference Result 149 states and 338 transitions. [2020-09-17 14:59:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:56,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:56,367 INFO L225 Difference]: With dead ends: 149 [2020-09-17 14:59:56,367 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 14:59:56,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=776, Invalid=2194, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 14:59:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 14:59:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 82. [2020-09-17 14:59:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 14:59:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 204 transitions. [2020-09-17 14:59:56,370 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 204 transitions. Word has length 29 [2020-09-17 14:59:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:56,371 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 204 transitions. [2020-09-17 14:59:56,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 204 transitions. [2020-09-17 14:59:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:56,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:56,372 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:56,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 14:59:56,575 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 113 times [2020-09-17 14:59:56,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:56,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283802598] [2020-09-17 14:59:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:57,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283802598] [2020-09-17 14:59:57,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83867388] [2020-09-17 14:59:57,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:57,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 14:59:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:57,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:57,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:57,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1607046222] [2020-09-17 14:59:57,129 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:57,131 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:57,138 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 14:59:57,138 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:57,141 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:57,141 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:57,192 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:57,193 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:57,203 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41320#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 14:59:57,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:57,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:57,205 INFO L87 Difference]: Start difference. First operand 82 states and 204 transitions. Second operand 26 states. [2020-09-17 14:59:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:58,481 INFO L93 Difference]: Finished difference Result 147 states and 336 transitions. [2020-09-17 14:59:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:58,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:58,483 INFO L225 Difference]: With dead ends: 147 [2020-09-17 14:59:58,483 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 14:59:58,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:59:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 14:59:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2020-09-17 14:59:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 14:59:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 210 transitions. [2020-09-17 14:59:58,487 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 210 transitions. Word has length 29 [2020-09-17 14:59:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:58,487 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 210 transitions. [2020-09-17 14:59:58,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 210 transitions. [2020-09-17 14:59:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:58,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:58,488 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:58,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 14:59:58,698 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 114 times [2020-09-17 14:59:58,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:58,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145533054] [2020-09-17 14:59:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:59,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145533054] [2020-09-17 14:59:59,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994742737] [2020-09-17 14:59:59,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:59,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 14:59:59,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:59,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:59,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:59,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [473645097] [2020-09-17 14:59:59,248 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:59,250 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:59,257 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 14:59:59,257 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:59,260 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:59,260 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:59,312 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:59,312 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:59,322 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41807#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 14:59:59,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:59,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:59,324 INFO L87 Difference]: Start difference. First operand 84 states and 210 transitions. Second operand 26 states. [2020-09-17 15:00:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:00,724 INFO L93 Difference]: Finished difference Result 145 states and 334 transitions. [2020-09-17 15:00:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:00:00,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:00,726 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:00:00,726 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:00:00,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 15:00:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:00:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-09-17 15:00:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:00:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 216 transitions. [2020-09-17 15:00:00,728 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 216 transitions. Word has length 29 [2020-09-17 15:00:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:00,729 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 216 transitions. [2020-09-17 15:00:00,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 216 transitions. [2020-09-17 15:00:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:00,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:00,729 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:00,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 15:00:00,930 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 115 times [2020-09-17 15:00:00,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:00,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055991013] [2020-09-17 15:00:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:01,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055991013] [2020-09-17 15:00:01,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951369343] [2020-09-17 15:00:01,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:01,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:01,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:01,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1276503987] [2020-09-17 15:00:01,453 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:01,454 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:01,463 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:01,463 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:01,466 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:01,466 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:01,515 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:01,516 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:01,526 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42300#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:00:01,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:01,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:01,527 INFO L87 Difference]: Start difference. First operand 86 states and 216 transitions. Second operand 26 states. [2020-09-17 15:00:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:03,059 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-17 15:00:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:00:03,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:03,061 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:00:03,061 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:00:03,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:00:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:00:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-09-17 15:00:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:00:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 222 transitions. [2020-09-17 15:00:03,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 222 transitions. Word has length 29 [2020-09-17 15:00:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:03,065 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 222 transitions. [2020-09-17 15:00:03,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 222 transitions. [2020-09-17 15:00:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:03,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:03,066 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:03,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:03,267 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 116 times [2020-09-17 15:00:03,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:03,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287868966] [2020-09-17 15:00:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:03,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287868966] [2020-09-17 15:00:03,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131769916] [2020-09-17 15:00:03,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:03,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:03,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:03,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:03,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [152016147] [2020-09-17 15:00:03,793 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:03,794 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:03,801 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:03,801 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:03,804 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:03,804 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:03,854 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:03,854 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:03,890 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42799#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:00:03,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:03,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:03,891 INFO L87 Difference]: Start difference. First operand 88 states and 222 transitions. Second operand 26 states. [2020-09-17 15:00:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:05,488 INFO L93 Difference]: Finished difference Result 141 states and 330 transitions. [2020-09-17 15:00:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:00:05,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:05,490 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:00:05,490 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:00:05,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1044, Invalid=2862, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:00:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:00:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2020-09-17 15:00:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:00:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2020-09-17 15:00:05,493 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 29 [2020-09-17 15:00:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:05,494 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2020-09-17 15:00:05,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2020-09-17 15:00:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:05,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:05,495 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:05,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 15:00:05,702 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 117 times [2020-09-17 15:00:05,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:05,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657838660] [2020-09-17 15:00:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:06,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657838660] [2020-09-17 15:00:06,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801718924] [2020-09-17 15:00:06,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:06,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:06,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:06,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:06,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:06,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1084118651] [2020-09-17 15:00:06,234 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:06,236 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:06,243 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:06,243 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:06,245 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:06,246 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:06,303 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:06,303 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:06,338 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43304#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:00:06,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:06,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:06,339 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand 26 states. [2020-09-17 15:00:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:08,070 INFO L93 Difference]: Finished difference Result 139 states and 328 transitions. [2020-09-17 15:00:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:00:08,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:08,072 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:00:08,072 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:00:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1151, Invalid=3009, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:00:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:00:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-09-17 15:00:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:00:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 234 transitions. [2020-09-17 15:00:08,074 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 234 transitions. Word has length 29 [2020-09-17 15:00:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:08,075 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 234 transitions. [2020-09-17 15:00:08,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 234 transitions. [2020-09-17 15:00:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:08,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:08,075 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:08,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:08,276 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 118 times [2020-09-17 15:00:08,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:08,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284997617] [2020-09-17 15:00:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284997617] [2020-09-17 15:00:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820431565] [2020-09-17 15:00:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:08,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:08,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:08,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:08,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [377358781] [2020-09-17 15:00:08,783 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:08,785 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:08,791 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:08,792 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:08,794 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:08,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:08,841 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:08,842 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:08,852 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43815#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:00:08,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:08,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:08,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:08,853 INFO L87 Difference]: Start difference. First operand 92 states and 234 transitions. Second operand 26 states. [2020-09-17 15:00:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:10,665 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2020-09-17 15:00:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:00:10,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:10,666 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:00:10,666 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:00:10,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1274, Invalid=3148, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:00:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:00:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-09-17 15:00:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:00:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 240 transitions. [2020-09-17 15:00:10,668 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 240 transitions. Word has length 29 [2020-09-17 15:00:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:10,669 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 240 transitions. [2020-09-17 15:00:10,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 240 transitions. [2020-09-17 15:00:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:10,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:10,669 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:10,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:10,870 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 119 times [2020-09-17 15:00:10,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:10,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798979401] [2020-09-17 15:00:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:11,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798979401] [2020-09-17 15:00:11,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683731086] [2020-09-17 15:00:11,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:11,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:11,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:11,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:11,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1056555038] [2020-09-17 15:00:11,397 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:11,398 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:11,406 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:11,406 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:11,408 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:11,408 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:11,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:11,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:11,469 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44332#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:00:11,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:11,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:11,470 INFO L87 Difference]: Start difference. First operand 94 states and 240 transitions. Second operand 26 states. [2020-09-17 15:00:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:13,364 INFO L93 Difference]: Finished difference Result 137 states and 329 transitions. [2020-09-17 15:00:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:00:13,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:13,366 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:00:13,366 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:00:13,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1413, Invalid=3279, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:00:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:00:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-09-17 15:00:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:00:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 248 transitions. [2020-09-17 15:00:13,370 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 248 transitions. Word has length 29 [2020-09-17 15:00:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:13,370 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 248 transitions. [2020-09-17 15:00:13,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 248 transitions. [2020-09-17 15:00:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:13,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:13,370 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:13,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2020-09-17 15:00:13,572 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 120 times [2020-09-17 15:00:13,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:13,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092901605] [2020-09-17 15:00:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:13,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092901605] [2020-09-17 15:00:13,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434669131] [2020-09-17 15:00:13,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:14,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 15:00:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:14,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:14,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:14,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1813807042] [2020-09-17 15:00:14,089 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:14,092 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:14,102 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:14,102 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:14,105 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:14,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:14,162 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:14,162 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:14,172 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44857#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:00:14,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:14,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:14,174 INFO L87 Difference]: Start difference. First operand 96 states and 248 transitions. Second operand 26 states. [2020-09-17 15:00:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:16,152 INFO L93 Difference]: Finished difference Result 138 states and 339 transitions. [2020-09-17 15:00:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 15:00:16,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:16,154 INFO L225 Difference]: With dead ends: 138 [2020-09-17 15:00:16,154 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 15:00:16,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1566, Invalid=3404, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:00:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 15:00:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2020-09-17 15:00:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 15:00:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 15:00:16,156 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2020-09-17 15:00:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:16,157 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 15:00:16,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 15:00:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:16,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:16,157 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:16,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:16,358 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 121 times [2020-09-17 15:00:16,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:16,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625689842] [2020-09-17 15:00:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:16,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625689842] [2020-09-17 15:00:16,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249073111] [2020-09-17 15:00:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:17,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:17,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:17,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [989903005] [2020-09-17 15:00:17,021 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:17,022 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:17,031 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-17 15:00:17,031 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:17,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:17,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:17,095 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:17,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:17,108 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45347#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:00:17,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:17,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:17,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:17,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:17,109 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 27 states. [2020-09-17 15:00:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:18,117 INFO L93 Difference]: Finished difference Result 134 states and 306 transitions. [2020-09-17 15:00:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 15:00:18,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:18,119 INFO L225 Difference]: With dead ends: 134 [2020-09-17 15:00:18,119 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 15:00:18,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 15:00:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 15:00:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2020-09-17 15:00:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 15:00:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 200 transitions. [2020-09-17 15:00:18,123 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 200 transitions. Word has length 30 [2020-09-17 15:00:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:18,123 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 200 transitions. [2020-09-17 15:00:18,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 200 transitions. [2020-09-17 15:00:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:18,124 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:18,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:18,332 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 122 times [2020-09-17 15:00:18,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:18,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680385746] [2020-09-17 15:00:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:18,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680385746] [2020-09-17 15:00:18,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617617641] [2020-09-17 15:00:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:18,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:18,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:18,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:18,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1573074332] [2020-09-17 15:00:18,952 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:18,954 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:18,962 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:18,962 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:18,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:18,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:19,021 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:19,022 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:19,036 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45807#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:00:19,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:19,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:19,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:19,037 INFO L87 Difference]: Start difference. First operand 81 states and 200 transitions. Second operand 27 states. [2020-09-17 15:00:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:20,204 INFO L93 Difference]: Finished difference Result 131 states and 302 transitions. [2020-09-17 15:00:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:00:20,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:20,206 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:00:20,206 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:00:20,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 15:00:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:00:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-09-17 15:00:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 15:00:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2020-09-17 15:00:20,208 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 30 [2020-09-17 15:00:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:20,209 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2020-09-17 15:00:20,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2020-09-17 15:00:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:20,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:20,209 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:20,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 15:00:20,411 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 123 times [2020-09-17 15:00:20,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:20,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598568958] [2020-09-17 15:00:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:20,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598568958] [2020-09-17 15:00:20,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590025508] [2020-09-17 15:00:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:21,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:21,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:21,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:21,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2084761599] [2020-09-17 15:00:21,030 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:21,031 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:21,038 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:21,038 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:21,038 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:21,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:21,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:21,092 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:21,105 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46272#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:00:21,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:21,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:21,106 INFO L87 Difference]: Start difference. First operand 83 states and 206 transitions. Second operand 27 states. [2020-09-17 15:00:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:22,366 INFO L93 Difference]: Finished difference Result 129 states and 300 transitions. [2020-09-17 15:00:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:00:22,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:22,368 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:00:22,368 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:00:22,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 15:00:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:00:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-09-17 15:00:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 15:00:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 212 transitions. [2020-09-17 15:00:22,371 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 212 transitions. Word has length 30 [2020-09-17 15:00:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:22,371 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 212 transitions. [2020-09-17 15:00:22,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 212 transitions. [2020-09-17 15:00:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:22,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:22,371 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:22,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:22,573 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 124 times [2020-09-17 15:00:22,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:22,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360018085] [2020-09-17 15:00:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360018085] [2020-09-17 15:00:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349752535] [2020-09-17 15:00:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:23,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:23,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:23,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:23,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:23,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [187491184] [2020-09-17 15:00:23,197 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:23,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:23,205 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:23,206 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:23,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:23,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:23,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:23,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:23,280 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46743#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:00:23,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:23,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:23,281 INFO L87 Difference]: Start difference. First operand 85 states and 212 transitions. Second operand 27 states. [2020-09-17 15:00:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:24,653 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-17 15:00:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:00:24,654 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:24,654 INFO L225 Difference]: With dead ends: 127 [2020-09-17 15:00:24,655 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 15:00:24,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 15:00:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 15:00:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-09-17 15:00:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 15:00:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 218 transitions. [2020-09-17 15:00:24,658 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 218 transitions. Word has length 30 [2020-09-17 15:00:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:24,658 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 218 transitions. [2020-09-17 15:00:24,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 218 transitions. [2020-09-17 15:00:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:24,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:24,659 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:24,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 15:00:24,860 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 125 times [2020-09-17 15:00:24,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:24,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964127175] [2020-09-17 15:00:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:25,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964127175] [2020-09-17 15:00:25,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215495953] [2020-09-17 15:00:25,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:25,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:25,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:25,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:25,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:25,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1371926772] [2020-09-17 15:00:25,460 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:25,462 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:25,469 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:25,469 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:25,471 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:25,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:25,524 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:25,525 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:25,563 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47220#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:00:25,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:25,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:25,564 INFO L87 Difference]: Start difference. First operand 87 states and 218 transitions. Second operand 27 states. [2020-09-17 15:00:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:27,068 INFO L93 Difference]: Finished difference Result 125 states and 296 transitions. [2020-09-17 15:00:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:00:27,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:27,070 INFO L225 Difference]: With dead ends: 125 [2020-09-17 15:00:27,071 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 15:00:27,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=891, Invalid=2649, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:00:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 15:00:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-09-17 15:00:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:00:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2020-09-17 15:00:27,074 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 30 [2020-09-17 15:00:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:27,074 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2020-09-17 15:00:27,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2020-09-17 15:00:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:27,075 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:27,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:27,282 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:27,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 126 times [2020-09-17 15:00:27,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:27,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301193162] [2020-09-17 15:00:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:27,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301193162] [2020-09-17 15:00:27,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131806273] [2020-09-17 15:00:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:27,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 15:00:27,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:27,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:27,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:27,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [76299505] [2020-09-17 15:00:27,882 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:27,883 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:27,891 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:27,891 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:27,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:27,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:27,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:27,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:27,985 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47703#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:00:27,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:27,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:27,987 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand 27 states. [2020-09-17 15:00:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:29,590 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2020-09-17 15:00:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:00:29,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:29,593 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:00:29,593 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:00:29,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2815, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:00:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:00:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 15:00:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:00:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2020-09-17 15:00:29,596 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 30 [2020-09-17 15:00:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:29,597 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2020-09-17 15:00:29,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2020-09-17 15:00:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:29,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:29,598 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:29,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 15:00:29,800 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 127 times [2020-09-17 15:00:29,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:29,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444020568] [2020-09-17 15:00:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:30,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444020568] [2020-09-17 15:00:30,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65327937] [2020-09-17 15:00:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:30,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:30,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:30,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [8448616] [2020-09-17 15:00:30,380 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:30,382 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:30,389 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:30,389 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:30,391 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:30,391 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:30,446 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:30,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:30,459 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48192#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:00:30,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:30,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:30,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:30,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:30,461 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand 27 states. [2020-09-17 15:00:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:32,195 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2020-09-17 15:00:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:00:32,196 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:32,197 INFO L225 Difference]: With dead ends: 121 [2020-09-17 15:00:32,197 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 15:00:32,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:00:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 15:00:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-09-17 15:00:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:00:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 236 transitions. [2020-09-17 15:00:32,200 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 236 transitions. Word has length 30 [2020-09-17 15:00:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:32,201 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 236 transitions. [2020-09-17 15:00:32,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 236 transitions. [2020-09-17 15:00:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:32,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:32,201 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:32,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:32,402 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 128 times [2020-09-17 15:00:32,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:32,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621837954] [2020-09-17 15:00:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:32,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621837954] [2020-09-17 15:00:32,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484737854] [2020-09-17 15:00:32,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:32,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:32,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:32,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:32,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [880994434] [2020-09-17 15:00:32,976 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:32,978 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:32,986 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:32,986 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:32,988 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:32,988 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:33,042 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:33,043 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:33,054 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48687#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:00:33,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:33,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:33,055 INFO L87 Difference]: Start difference. First operand 93 states and 236 transitions. Second operand 27 states. [2020-09-17 15:00:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:34,924 INFO L93 Difference]: Finished difference Result 119 states and 290 transitions. [2020-09-17 15:00:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:00:34,925 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:34,925 INFO L225 Difference]: With dead ends: 119 [2020-09-17 15:00:34,926 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 15:00:34,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1167, Invalid=3123, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:00:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 15:00:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-09-17 15:00:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:00:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 242 transitions. [2020-09-17 15:00:34,929 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 242 transitions. Word has length 30 [2020-09-17 15:00:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:34,929 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 242 transitions. [2020-09-17 15:00:34,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 242 transitions. [2020-09-17 15:00:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:34,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:34,930 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:35,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 15:00:35,132 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 129 times [2020-09-17 15:00:35,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:35,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080766797] [2020-09-17 15:00:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:35,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080766797] [2020-09-17 15:00:35,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771464914] [2020-09-17 15:00:35,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:35,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:35,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:35,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:35,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394175119] [2020-09-17 15:00:35,702 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:35,704 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:35,712 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:35,712 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:35,712 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:35,713 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:35,766 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:35,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:35,779 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49188#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:00:35,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:35,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:35,781 INFO L87 Difference]: Start difference. First operand 95 states and 242 transitions. Second operand 27 states. [2020-09-17 15:00:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:37,791 INFO L93 Difference]: Finished difference Result 117 states and 288 transitions. [2020-09-17 15:00:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:00:37,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:37,793 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:37,794 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:00:37,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1291, Invalid=3265, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:00:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:00:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-09-17 15:00:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:00:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 248 transitions. [2020-09-17 15:00:37,796 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 248 transitions. Word has length 30 [2020-09-17 15:00:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:37,797 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 248 transitions. [2020-09-17 15:00:37,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 248 transitions. [2020-09-17 15:00:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:37,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:37,797 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:37,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:37,998 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 130 times [2020-09-17 15:00:37,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:37,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223482364] [2020-09-17 15:00:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:38,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223482364] [2020-09-17 15:00:38,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462972197] [2020-09-17 15:00:38,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:38,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:38,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:38,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:38,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:38,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [470869271] [2020-09-17 15:00:38,555 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:38,556 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:38,565 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:38,565 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:38,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:38,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:38,621 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:38,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:38,634 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49695#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:00:38,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:38,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:38,635 INFO L87 Difference]: Start difference. First operand 97 states and 248 transitions. Second operand 27 states. [2020-09-17 15:00:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:40,753 INFO L93 Difference]: Finished difference Result 117 states and 291 transitions. [2020-09-17 15:00:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:00:40,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:40,755 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:40,755 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:00:40,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1431, Invalid=3399, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:00:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:00:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-09-17 15:00:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:00:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 256 transitions. [2020-09-17 15:00:40,758 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 256 transitions. Word has length 30 [2020-09-17 15:00:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:40,758 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 256 transitions. [2020-09-17 15:00:40,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 256 transitions. [2020-09-17 15:00:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:40,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:40,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:40,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:40,960 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 131 times [2020-09-17 15:00:40,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:40,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842740644] [2020-09-17 15:00:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:41,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842740644] [2020-09-17 15:00:41,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411594355] [2020-09-17 15:00:41,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:41,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:41,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:41,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:41,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [73042416] [2020-09-17 15:00:41,553 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:41,555 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:41,564 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:41,564 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:41,565 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:41,565 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:41,620 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:41,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:41,635 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50210#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:00:41,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:41,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:41,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:41,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:41,637 INFO L87 Difference]: Start difference. First operand 99 states and 256 transitions. Second operand 27 states. [2020-09-17 15:00:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:43,844 INFO L93 Difference]: Finished difference Result 117 states and 299 transitions. [2020-09-17 15:00:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 15:00:43,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:43,846 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:43,846 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 15:00:43,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1585, Invalid=3527, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:00:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 15:00:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 15:00:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 15:00:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 15:00:43,849 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2020-09-17 15:00:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:43,849 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 15:00:43,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 15:00:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:43,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:43,849 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:44,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:44,050 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 132 times [2020-09-17 15:00:44,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:44,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320288018] [2020-09-17 15:00:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:44,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320288018] [2020-09-17 15:00:44,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871802164] [2020-09-17 15:00:44,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:44,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:00:44,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:44,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:44,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:44,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306766458] [2020-09-17 15:00:44,764 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:44,766 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:44,776 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2020-09-17 15:00:44,777 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:44,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,836 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,837 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,875 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,880 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,896 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,942 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,942 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:44,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:44,957 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50683#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 15:00:44,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:44,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:44,959 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 28 states. [2020-09-17 15:00:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:46,131 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2020-09-17 15:00:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:00:46,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:46,133 INFO L225 Difference]: With dead ends: 114 [2020-09-17 15:00:46,133 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 15:00:46,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 15:00:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 15:00:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-17 15:00:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:00:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-17 15:00:46,135 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 31 [2020-09-17 15:00:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:46,135 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-17 15:00:46,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-17 15:00:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:46,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:46,136 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:46,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 15:00:46,344 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 133 times [2020-09-17 15:00:46,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:46,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438663800] [2020-09-17 15:00:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:46,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438663800] [2020-09-17 15:00:46,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262446981] [2020-09-17 15:00:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:47,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:47,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:47,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [503382018] [2020-09-17 15:00:47,052 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:47,054 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:47,080 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:47,080 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:47,081 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:47,081 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:47,139 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:47,139 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:47,152 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51129#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 15:00:47,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:47,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:47,153 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 28 states. [2020-09-17 15:00:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:48,416 INFO L93 Difference]: Finished difference Result 162 states and 364 transitions. [2020-09-17 15:00:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:00:48,418 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:48,418 INFO L225 Difference]: With dead ends: 162 [2020-09-17 15:00:48,419 INFO L226 Difference]: Without dead ends: 156 [2020-09-17 15:00:48,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=872, Invalid=2320, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 15:00:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-17 15:00:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 84. [2020-09-17 15:00:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 15:00:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-09-17 15:00:48,422 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 31 [2020-09-17 15:00:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:48,422 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-09-17 15:00:48,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-09-17 15:00:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:48,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:48,423 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:48,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-17 15:00:48,625 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 134 times [2020-09-17 15:00:48,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:48,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982863519] [2020-09-17 15:00:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:49,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982863519] [2020-09-17 15:00:49,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477715272] [2020-09-17 15:00:49,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:49,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:49,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:49,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288975734] [2020-09-17 15:00:49,316 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:49,318 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:49,327 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:49,327 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:49,330 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:49,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:49,386 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:49,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:49,397 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51635#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:00:49,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:49,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:49,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:49,398 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand 28 states. [2020-09-17 15:00:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:50,760 INFO L93 Difference]: Finished difference Result 159 states and 360 transitions. [2020-09-17 15:00:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:00:50,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:50,762 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:00:50,762 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:00:50,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=897, Invalid=2525, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 15:00:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:00:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2020-09-17 15:00:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:00:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 214 transitions. [2020-09-17 15:00:50,765 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 214 transitions. Word has length 31 [2020-09-17 15:00:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:50,765 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 214 transitions. [2020-09-17 15:00:50,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 214 transitions. [2020-09-17 15:00:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:50,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:50,766 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:50,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 15:00:50,967 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 135 times [2020-09-17 15:00:50,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:50,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602340863] [2020-09-17 15:00:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:51,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602340863] [2020-09-17 15:00:51,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110565423] [2020-09-17 15:00:51,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:51,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:00:51,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:51,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:51,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:51,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [43259009] [2020-09-17 15:00:51,665 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:51,667 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:51,675 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:51,675 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:51,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:51,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:51,734 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:51,734 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:51,745 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52146#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:00:51,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:51,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:51,747 INFO L87 Difference]: Start difference. First operand 86 states and 214 transitions. Second operand 28 states. [2020-09-17 15:00:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:53,238 INFO L93 Difference]: Finished difference Result 157 states and 358 transitions. [2020-09-17 15:00:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:00:53,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:53,240 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:00:53,240 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:00:53,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=938, Invalid=2722, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:00:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:00:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2020-09-17 15:00:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:00:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 220 transitions. [2020-09-17 15:00:53,244 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 220 transitions. Word has length 31 [2020-09-17 15:00:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:53,245 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 220 transitions. [2020-09-17 15:00:53,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 220 transitions. [2020-09-17 15:00:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:53,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:53,245 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:53,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 15:00:53,449 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 136 times [2020-09-17 15:00:53,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:53,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088477691] [2020-09-17 15:00:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:54,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088477691] [2020-09-17 15:00:54,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361905268] [2020-09-17 15:00:54,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:54,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:54,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295828388] [2020-09-17 15:00:54,100 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:54,102 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:54,110 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:54,110 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:54,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:54,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:54,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:54,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:54,180 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52663#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:00:54,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:54,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:54,182 INFO L87 Difference]: Start difference. First operand 88 states and 220 transitions. Second operand 28 states. [2020-09-17 15:00:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:55,845 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-17 15:00:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:00:55,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:55,847 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:00:55,847 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:00:55,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=995, Invalid=2911, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:00:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:00:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2020-09-17 15:00:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:00:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 226 transitions. [2020-09-17 15:00:55,851 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 226 transitions. Word has length 31 [2020-09-17 15:00:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:55,851 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 226 transitions. [2020-09-17 15:00:55,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 226 transitions. [2020-09-17 15:00:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:55,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:55,851 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:56,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 15:00:56,052 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 137 times [2020-09-17 15:00:56,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580924577] [2020-09-17 15:00:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:56,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580924577] [2020-09-17 15:00:56,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160599655] [2020-09-17 15:00:56,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:56,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:00:56,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:56,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:56,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:56,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575016014] [2020-09-17 15:00:56,707 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:56,708 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:56,717 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:56,717 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:56,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,720 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,778 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,778 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,790 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53186#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:00:56,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:56,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:56,791 INFO L87 Difference]: Start difference. First operand 90 states and 226 transitions. Second operand 28 states. [2020-09-17 15:00:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:58,518 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-17 15:00:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:00:58,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:58,520 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:00:58,520 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:00:58,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1068, Invalid=3092, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:00:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:00:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2020-09-17 15:00:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:00:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 232 transitions. [2020-09-17 15:00:58,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 232 transitions. Word has length 31 [2020-09-17 15:00:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:58,523 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 232 transitions. [2020-09-17 15:00:58,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 232 transitions. [2020-09-17 15:00:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:58,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:58,524 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:58,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:58,725 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:58,726 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 138 times [2020-09-17 15:00:58,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:58,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79001970] [2020-09-17 15:00:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:59,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79001970] [2020-09-17 15:00:59,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072611468] [2020-09-17 15:00:59,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:00:59,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:00:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:59,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:59,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:59,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868774451] [2020-09-17 15:00:59,346 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:59,347 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:59,355 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:59,355 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:59,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:59,358 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:59,413 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:59,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:59,425 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53715#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:00:59,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:59,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:59,426 INFO L87 Difference]: Start difference. First operand 92 states and 232 transitions. Second operand 28 states. [2020-09-17 15:01:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:01,240 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-17 15:01:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:01:01,242 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:01,242 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:01:01,243 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:01:01,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:01:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:01:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2020-09-17 15:01:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:01:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 238 transitions. [2020-09-17 15:01:01,246 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 238 transitions. Word has length 31 [2020-09-17 15:01:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:01,246 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 238 transitions. [2020-09-17 15:01:01,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 238 transitions. [2020-09-17 15:01:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:01,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:01,246 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:01,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 15:01:01,447 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:01,448 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 139 times [2020-09-17 15:01:01,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:01,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925603885] [2020-09-17 15:01:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925603885] [2020-09-17 15:01:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915467391] [2020-09-17 15:01:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:02,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:02,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169413081] [2020-09-17 15:01:02,058 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:02,060 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:02,068 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:02,068 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:02,069 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:02,069 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:02,124 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:02,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:02,165 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54250#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:01:02,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:02,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:02,167 INFO L87 Difference]: Start difference. First operand 94 states and 238 transitions. Second operand 28 states. [2020-09-17 15:01:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:04,194 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 15:01:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:01:04,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:04,196 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:01:04,196 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:01:04,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1262, Invalid=3430, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:01:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:01:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-09-17 15:01:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:01:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 244 transitions. [2020-09-17 15:01:04,198 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 244 transitions. Word has length 31 [2020-09-17 15:01:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:04,199 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 244 transitions. [2020-09-17 15:01:04,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 244 transitions. [2020-09-17 15:01:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:04,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:04,199 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:04,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:04,400 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 140 times [2020-09-17 15:01:04,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:04,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101315485] [2020-09-17 15:01:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:04,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101315485] [2020-09-17 15:01:04,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200057775] [2020-09-17 15:01:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:04,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:05,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:05,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:05,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1053038204] [2020-09-17 15:01:05,031 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:05,033 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:05,041 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:05,041 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:05,044 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:05,044 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:05,100 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:05,101 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:05,112 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54791#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:01:05,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:05,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:05,113 INFO L87 Difference]: Start difference. First operand 96 states and 244 transitions. Second operand 28 states. [2020-09-17 15:01:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:07,212 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-17 15:01:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:01:07,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:07,214 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:01:07,214 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:01:07,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1383, Invalid=3587, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:01:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:01:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-17 15:01:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:01:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 250 transitions. [2020-09-17 15:01:07,218 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 250 transitions. Word has length 31 [2020-09-17 15:01:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:07,218 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 250 transitions. [2020-09-17 15:01:07,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 250 transitions. [2020-09-17 15:01:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:07,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:07,219 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:07,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:07,420 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 141 times [2020-09-17 15:01:07,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:07,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166198938] [2020-09-17 15:01:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166198938] [2020-09-17 15:01:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827398699] [2020-09-17 15:01:07,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:07,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:08,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:08,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [559208723] [2020-09-17 15:01:08,025 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:08,027 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:08,035 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:08,035 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:08,038 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:08,038 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:08,095 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:08,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:08,107 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55338#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:01:08,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:08,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:08,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:08,108 INFO L87 Difference]: Start difference. First operand 98 states and 250 transitions. Second operand 28 states. [2020-09-17 15:01:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:10,377 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 15:01:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:01:10,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:10,379 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:01:10,379 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:01:10,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1520, Invalid=3736, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:01:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:01:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2020-09-17 15:01:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:01:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 256 transitions. [2020-09-17 15:01:10,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 256 transitions. Word has length 31 [2020-09-17 15:01:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:10,383 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 256 transitions. [2020-09-17 15:01:10,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 256 transitions. [2020-09-17 15:01:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:10,383 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:10,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:10,584 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 142 times [2020-09-17 15:01:10,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:10,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679833407] [2020-09-17 15:01:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:11,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679833407] [2020-09-17 15:01:11,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102441348] [2020-09-17 15:01:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:11,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:11,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:11,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:11,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:11,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [515658167] [2020-09-17 15:01:11,218 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:11,221 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:11,229 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:11,229 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:11,230 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:11,230 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:11,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:11,296 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:11,309 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55891#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:01:11,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:11,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:11,310 INFO L87 Difference]: Start difference. First operand 100 states and 256 transitions. Second operand 28 states. [2020-09-17 15:01:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:13,698 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-17 15:01:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:01:13,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:13,700 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:01:13,701 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:01:13,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1673, Invalid=3877, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:01:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:01:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2020-09-17 15:01:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:01:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 264 transitions. [2020-09-17 15:01:13,704 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 264 transitions. Word has length 31 [2020-09-17 15:01:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:13,704 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 264 transitions. [2020-09-17 15:01:13,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 264 transitions. [2020-09-17 15:01:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:13,704 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:13,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:13,905 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 143 times [2020-09-17 15:01:13,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:13,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014530187] [2020-09-17 15:01:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:14,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014530187] [2020-09-17 15:01:14,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130234687] [2020-09-17 15:01:14,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:14,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:14,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:14,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:14,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1329297798] [2020-09-17 15:01:14,544 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:14,546 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:14,555 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:14,555 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:14,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:14,559 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:14,615 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:14,615 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:14,626 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56452#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:01:14,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:14,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:14,627 INFO L87 Difference]: Start difference. First operand 102 states and 264 transitions. Second operand 28 states. [2020-09-17 15:01:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:17,050 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2020-09-17 15:01:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 15:01:17,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:17,052 INFO L225 Difference]: With dead ends: 146 [2020-09-17 15:01:17,053 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 15:01:17,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1840, Invalid=4012, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:01:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 15:01:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2020-09-17 15:01:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 15:01:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-17 15:01:17,055 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 31 [2020-09-17 15:01:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:17,056 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-17 15:01:17,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-17 15:01:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:17,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:17,056 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:17,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-17 15:01:17,257 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 144 times [2020-09-17 15:01:17,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:17,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670177240] [2020-09-17 15:01:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:17,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670177240] [2020-09-17 15:01:17,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367826048] [2020-09-17 15:01:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:18,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:01:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:18,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:18,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:18,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1025647164] [2020-09-17 15:01:18,070 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:18,072 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:18,083 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 48 transitions. [2020-09-17 15:01:18,083 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:18,085 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:18,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:18,150 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:18,150 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:18,165 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56974#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:01:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:18,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:18,166 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 29 states. [2020-09-17 15:01:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:19,429 INFO L93 Difference]: Finished difference Result 142 states and 324 transitions. [2020-09-17 15:01:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:01:19,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:19,431 INFO L225 Difference]: With dead ends: 142 [2020-09-17 15:01:19,431 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 15:01:19,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 15:01:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 15:01:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2020-09-17 15:01:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 15:01:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 210 transitions. [2020-09-17 15:01:19,433 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 210 transitions. Word has length 32 [2020-09-17 15:01:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:19,433 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 210 transitions. [2020-09-17 15:01:19,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 210 transitions. [2020-09-17 15:01:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:19,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:19,434 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:19,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 15:01:19,635 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 145 times [2020-09-17 15:01:19,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:19,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900119746] [2020-09-17 15:01:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:20,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900119746] [2020-09-17 15:01:20,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456293583] [2020-09-17 15:01:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:20,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:20,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:20,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:20,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351200070] [2020-09-17 15:01:20,413 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:20,415 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:20,425 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:20,425 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:20,426 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:20,426 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:20,488 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:20,488 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:20,502 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57462#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:01:20,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:20,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:20,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:20,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:20,503 INFO L87 Difference]: Start difference. First operand 85 states and 210 transitions. Second operand 29 states. [2020-09-17 15:01:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:21,881 INFO L93 Difference]: Finished difference Result 139 states and 320 transitions. [2020-09-17 15:01:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:01:21,882 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:21,883 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:01:21,883 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:01:21,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=882, Invalid=2424, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 15:01:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:01:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2020-09-17 15:01:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 15:01:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 216 transitions. [2020-09-17 15:01:21,886 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 216 transitions. Word has length 32 [2020-09-17 15:01:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:21,886 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 216 transitions. [2020-09-17 15:01:21,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 216 transitions. [2020-09-17 15:01:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:21,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:21,886 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:22,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 15:01:22,088 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 146 times [2020-09-17 15:01:22,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:22,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314138133] [2020-09-17 15:01:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:22,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314138133] [2020-09-17 15:01:22,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857307085] [2020-09-17 15:01:22,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:22,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:22,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:22,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:22,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:22,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [640319492] [2020-09-17 15:01:22,831 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:22,834 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:22,846 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:22,847 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:22,847 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:22,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:22,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:22,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:22,923 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57955#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:01:22,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:22,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:22,924 INFO L87 Difference]: Start difference. First operand 87 states and 216 transitions. Second operand 29 states. [2020-09-17 15:01:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:24,400 INFO L93 Difference]: Finished difference Result 137 states and 318 transitions. [2020-09-17 15:01:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:01:24,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:24,401 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:01:24,401 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:01:24,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=908, Invalid=2632, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:01:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:01:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-09-17 15:01:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:01:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 222 transitions. [2020-09-17 15:01:24,405 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 222 transitions. Word has length 32 [2020-09-17 15:01:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:24,405 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 222 transitions. [2020-09-17 15:01:24,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 222 transitions. [2020-09-17 15:01:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:24,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:24,405 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:24,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 15:01:24,607 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 147 times [2020-09-17 15:01:24,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:24,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764312056] [2020-09-17 15:01:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:25,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764312056] [2020-09-17 15:01:25,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084479557] [2020-09-17 15:01:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:25,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:25,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:25,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1506612984] [2020-09-17 15:01:25,325 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:25,327 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:25,336 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:25,336 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:25,338 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:25,338 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:25,397 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:25,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:25,411 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58454#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:01:25,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:25,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:25,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:25,413 INFO L87 Difference]: Start difference. First operand 89 states and 222 transitions. Second operand 29 states. [2020-09-17 15:01:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:27,055 INFO L93 Difference]: Finished difference Result 135 states and 316 transitions. [2020-09-17 15:01:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:01:27,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:27,057 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:01:27,057 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:01:27,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:01:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:01:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 91. [2020-09-17 15:01:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:01:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 228 transitions. [2020-09-17 15:01:27,060 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 228 transitions. Word has length 32 [2020-09-17 15:01:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:27,061 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 228 transitions. [2020-09-17 15:01:27,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 228 transitions. [2020-09-17 15:01:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:27,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:27,061 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:27,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 15:01:27,262 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 148 times [2020-09-17 15:01:27,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:27,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895743500] [2020-09-17 15:01:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895743500] [2020-09-17 15:01:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685031282] [2020-09-17 15:01:27,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:27,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:27,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:27,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:27,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [921829427] [2020-09-17 15:01:27,960 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:27,962 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:27,971 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:27,971 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:27,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:27,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:28,031 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:28,031 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:28,046 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58959#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:01:28,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:28,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:28,047 INFO L87 Difference]: Start difference. First operand 91 states and 228 transitions. Second operand 29 states. [2020-09-17 15:01:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:29,775 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-17 15:01:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:01:29,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:29,777 INFO L225 Difference]: With dead ends: 133 [2020-09-17 15:01:29,777 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 15:01:29,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1008, Invalid=3024, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:01:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 15:01:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2020-09-17 15:01:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:01:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 234 transitions. [2020-09-17 15:01:29,780 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 234 transitions. Word has length 32 [2020-09-17 15:01:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:29,780 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 234 transitions. [2020-09-17 15:01:29,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 234 transitions. [2020-09-17 15:01:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:29,781 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:29,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:29,982 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 149 times [2020-09-17 15:01:29,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:29,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485554276] [2020-09-17 15:01:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:30,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485554276] [2020-09-17 15:01:30,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543043562] [2020-09-17 15:01:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:30,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:30,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:30,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:30,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [775538970] [2020-09-17 15:01:30,649 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:30,651 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:30,660 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:30,660 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:30,661 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:30,661 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:30,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:30,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:30,735 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59470#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:01:30,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:30,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:30,736 INFO L87 Difference]: Start difference. First operand 93 states and 234 transitions. Second operand 29 states. [2020-09-17 15:01:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:32,629 INFO L93 Difference]: Finished difference Result 131 states and 312 transitions. [2020-09-17 15:01:32,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:01:32,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:32,631 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:01:32,631 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:01:32,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1082, Invalid=3208, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:01:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:01:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2020-09-17 15:01:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:01:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 240 transitions. [2020-09-17 15:01:32,634 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 240 transitions. Word has length 32 [2020-09-17 15:01:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:32,634 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 240 transitions. [2020-09-17 15:01:32,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 240 transitions. [2020-09-17 15:01:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:32,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:32,635 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:32,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:32,836 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 150 times [2020-09-17 15:01:32,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:32,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780681664] [2020-09-17 15:01:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:33,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780681664] [2020-09-17 15:01:33,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279361574] [2020-09-17 15:01:33,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:33,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:01:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:33,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:33,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:33,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183601342] [2020-09-17 15:01:33,535 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:33,538 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:33,549 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:33,550 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:33,552 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:33,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:33,619 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:33,619 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:33,633 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59987#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:01:33,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:33,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:33,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:33,635 INFO L87 Difference]: Start difference. First operand 95 states and 240 transitions. Second operand 29 states. [2020-09-17 15:01:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:35,657 INFO L93 Difference]: Finished difference Result 129 states and 310 transitions. [2020-09-17 15:01:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:01:35,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:35,660 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:01:35,660 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:01:35,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1172, Invalid=3384, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:01:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:01:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-09-17 15:01:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:01:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 246 transitions. [2020-09-17 15:01:35,664 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 246 transitions. Word has length 32 [2020-09-17 15:01:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:35,664 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 246 transitions. [2020-09-17 15:01:35,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 246 transitions. [2020-09-17 15:01:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:35,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:35,665 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:35,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:35,874 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 151 times [2020-09-17 15:01:35,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:35,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085937214] [2020-09-17 15:01:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:36,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085937214] [2020-09-17 15:01:36,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242652013] [2020-09-17 15:01:36,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:36,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:36,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:36,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:36,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1168343452] [2020-09-17 15:01:36,554 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:36,556 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:36,565 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:36,565 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:36,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:36,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:36,628 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:36,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:36,640 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [60510#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:01:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:36,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:36,642 INFO L87 Difference]: Start difference. First operand 97 states and 246 transitions. Second operand 29 states. [2020-09-17 15:01:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:38,804 INFO L93 Difference]: Finished difference Result 127 states and 308 transitions. [2020-09-17 15:01:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:01:38,805 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:38,806 INFO L225 Difference]: With dead ends: 127 [2020-09-17 15:01:38,806 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 15:01:38,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1278, Invalid=3552, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:01:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 15:01:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-17 15:01:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:01:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2020-09-17 15:01:38,809 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 32 [2020-09-17 15:01:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:38,810 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2020-09-17 15:01:38,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2020-09-17 15:01:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:38,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:38,810 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:39,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:39,021 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 152 times [2020-09-17 15:01:39,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:39,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329323025] [2020-09-17 15:01:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:39,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329323025] [2020-09-17 15:01:39,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780191037] [2020-09-17 15:01:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:39,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:39,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:39,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:39,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [625952095] [2020-09-17 15:01:39,680 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:39,682 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:39,693 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:39,693 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:39,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:39,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:39,757 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:39,758 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:39,774 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61039#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:01:39,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:39,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:39,775 INFO L87 Difference]: Start difference. First operand 99 states and 252 transitions. Second operand 29 states. [2020-09-17 15:01:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:42,038 INFO L93 Difference]: Finished difference Result 125 states and 306 transitions. [2020-09-17 15:01:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:01:42,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:42,040 INFO L225 Difference]: With dead ends: 125 [2020-09-17 15:01:42,040 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 15:01:42,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1400, Invalid=3712, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:01:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 15:01:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-09-17 15:01:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:01:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 258 transitions. [2020-09-17 15:01:42,043 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 258 transitions. Word has length 32 [2020-09-17 15:01:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:42,043 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 258 transitions. [2020-09-17 15:01:42,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 258 transitions. [2020-09-17 15:01:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:42,044 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:42,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:42,246 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 153 times [2020-09-17 15:01:42,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:42,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773443154] [2020-09-17 15:01:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:42,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773443154] [2020-09-17 15:01:42,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994686000] [2020-09-17 15:01:42,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:42,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:42,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:42,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:42,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:42,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [258137569] [2020-09-17 15:01:42,922 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:42,925 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:42,936 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:42,936 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:42,937 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:42,937 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:42,988 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:42,988 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:43,001 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61574#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:01:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:43,002 INFO L87 Difference]: Start difference. First operand 101 states and 258 transitions. Second operand 29 states. [2020-09-17 15:01:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:45,511 INFO L93 Difference]: Finished difference Result 123 states and 304 transitions. [2020-09-17 15:01:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:01:45,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:45,512 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:01:45,512 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:01:45,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1538, Invalid=3864, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:01:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:01:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-09-17 15:01:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:01:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 264 transitions. [2020-09-17 15:01:45,515 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 264 transitions. Word has length 32 [2020-09-17 15:01:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:45,516 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 264 transitions. [2020-09-17 15:01:45,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 264 transitions. [2020-09-17 15:01:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:45,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:45,516 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:45,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:45,717 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 154 times [2020-09-17 15:01:45,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:45,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23806507] [2020-09-17 15:01:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:46,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23806507] [2020-09-17 15:01:46,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512957596] [2020-09-17 15:01:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:46,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:46,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:46,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:46,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:46,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [732583578] [2020-09-17 15:01:46,369 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:46,371 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:46,380 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:46,380 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:46,381 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:46,381 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:46,439 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:46,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:46,454 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62115#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:01:46,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:46,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:46,456 INFO L87 Difference]: Start difference. First operand 103 states and 264 transitions. Second operand 29 states. [2020-09-17 15:01:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:48,970 INFO L93 Difference]: Finished difference Result 123 states and 307 transitions. [2020-09-17 15:01:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:01:48,972 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:48,972 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:01:48,972 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:01:48,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1692, Invalid=4008, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:01:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:01:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-09-17 15:01:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:01:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2020-09-17 15:01:48,975 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 32 [2020-09-17 15:01:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:48,975 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2020-09-17 15:01:48,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2020-09-17 15:01:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:48,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:48,976 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:49,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:49,177 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 155 times [2020-09-17 15:01:49,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:49,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501965252] [2020-09-17 15:01:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:49,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501965252] [2020-09-17 15:01:49,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569007543] [2020-09-17 15:01:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:49,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:49,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:49,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:49,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:49,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245675999] [2020-09-17 15:01:49,850 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:49,851 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:49,861 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:49,862 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:49,862 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:49,862 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:49,928 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:49,929 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:49,964 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62664#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:01:49,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:49,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:49,965 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand 29 states. [2020-09-17 15:01:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:52,603 INFO L93 Difference]: Finished difference Result 123 states and 315 transitions. [2020-09-17 15:01:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 15:01:52,604 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:52,605 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:01:52,605 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:01:52,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1860, Invalid=4146, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:01:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:01:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-09-17 15:01:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 15:01:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 15:01:52,608 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2020-09-17 15:01:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:52,608 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 15:01:52,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 15:01:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:01:52,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:52,608 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:52,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 15:01:52,810 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:52,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 156 times [2020-09-17 15:01:52,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:52,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323818860] [2020-09-17 15:01:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:53,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323818860] [2020-09-17 15:01:53,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004147039] [2020-09-17 15:01:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:53,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:01:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:01:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:53,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:53,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:01:53,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1886129517] [2020-09-17 15:01:53,641 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:53,643 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:53,670 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 53 transitions. [2020-09-17 15:01:53,671 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:53,675 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,728 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,770 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,774 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,790 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,835 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,836 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,843 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:53,844 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:53,854 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63167#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 15:01:53,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:01:53,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:01:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:01:53,855 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 30 states. [2020-09-17 15:01:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:55,231 INFO L93 Difference]: Finished difference Result 120 states and 280 transitions. [2020-09-17 15:01:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:01:55,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:01:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:55,233 INFO L225 Difference]: With dead ends: 120 [2020-09-17 15:01:55,234 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 15:01:55,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 15:01:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 15:01:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-17 15:01:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:01:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-17 15:01:55,237 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 33 [2020-09-17 15:01:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:55,237 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-17 15:01:55,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:01:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-17 15:01:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:01:55,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:55,238 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:55,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:55,439 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 157 times [2020-09-17 15:01:55,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:55,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205254445] [2020-09-17 15:01:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:56,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205254445] [2020-09-17 15:01:56,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286430253] [2020-09-17 15:01:56,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:01:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:56,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:56,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:01:56,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [160316792] [2020-09-17 15:01:56,245 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:56,247 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:56,284 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:01:56,284 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:56,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:56,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:56,346 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:56,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:56,365 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63639#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 15:01:56,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:01:56,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:01:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:01:56,366 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 30 states. [2020-09-17 15:01:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:57,864 INFO L93 Difference]: Finished difference Result 172 states and 386 transitions. [2020-09-17 15:01:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:01:57,865 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:01:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:57,866 INFO L225 Difference]: With dead ends: 172 [2020-09-17 15:01:57,866 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 15:01:57,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1005, Invalid=2655, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:01:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 15:01:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2020-09-17 15:01:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:01:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 218 transitions. [2020-09-17 15:01:57,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 218 transitions. Word has length 33 [2020-09-17 15:01:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:57,869 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 218 transitions. [2020-09-17 15:01:57,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:01:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 218 transitions. [2020-09-17 15:01:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:01:57,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:57,870 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:58,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 15:01:58,071 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 158 times [2020-09-17 15:01:58,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:58,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398944562] [2020-09-17 15:01:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:58,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398944562] [2020-09-17 15:01:58,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645747904] [2020-09-17 15:01:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:01:58,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:58,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:01:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:58,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:58,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:01:58,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1230241349] [2020-09-17 15:01:58,893 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:58,895 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:58,906 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:01:58,907 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:58,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:58,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:58,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:58,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:58,986 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64175#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:01:58,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:01:58,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:01:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:01:58,988 INFO L87 Difference]: Start difference. First operand 88 states and 218 transitions. Second operand 30 states. [2020-09-17 15:02:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:00,604 INFO L93 Difference]: Finished difference Result 169 states and 382 transitions. [2020-09-17 15:02:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:02:00,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:00,605 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:02:00,606 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:02:00,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1028, Invalid=2878, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:02:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:02:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2020-09-17 15:02:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:02:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2020-09-17 15:02:00,608 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 33 [2020-09-17 15:02:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:00,609 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2020-09-17 15:02:00,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2020-09-17 15:02:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:00,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:00,609 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:00,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:00,810 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 159 times [2020-09-17 15:02:00,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:00,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813548347] [2020-09-17 15:02:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:01,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813548347] [2020-09-17 15:02:01,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542126312] [2020-09-17 15:02:01,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:02:01,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:02:01,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:01,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:01,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:01,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123806146] [2020-09-17 15:02:01,612 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:01,614 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:01,624 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:01,624 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:01,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:01,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:01,687 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:01,687 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:01,702 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64716#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:02:01,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:01,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:01,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:01,703 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand 30 states. [2020-09-17 15:02:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:03,431 INFO L93 Difference]: Finished difference Result 167 states and 380 transitions. [2020-09-17 15:02:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:02:03,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:03,434 INFO L225 Difference]: With dead ends: 167 [2020-09-17 15:02:03,434 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 15:02:03,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:02:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 15:02:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2020-09-17 15:02:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:02:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 230 transitions. [2020-09-17 15:02:03,438 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 230 transitions. Word has length 33 [2020-09-17 15:02:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:03,438 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 230 transitions. [2020-09-17 15:02:03,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 230 transitions. [2020-09-17 15:02:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:03,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:03,439 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:03,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-17 15:02:03,649 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:03,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 160 times [2020-09-17 15:02:03,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:03,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435378361] [2020-09-17 15:02:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:04,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435378361] [2020-09-17 15:02:04,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992967824] [2020-09-17 15:02:04,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:02:04,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:04,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:04,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:04,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1822515093] [2020-09-17 15:02:04,418 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:04,420 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:04,428 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:04,429 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:04,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:04,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:04,492 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:04,492 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:04,506 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65263#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:02:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:04,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:04,507 INFO L87 Difference]: Start difference. First operand 92 states and 230 transitions. Second operand 30 states. [2020-09-17 15:02:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:06,368 INFO L93 Difference]: Finished difference Result 165 states and 378 transitions. [2020-09-17 15:02:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:02:06,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:06,371 INFO L225 Difference]: With dead ends: 165 [2020-09-17 15:02:06,371 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 15:02:06,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1122, Invalid=3300, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:02:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 15:02:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 94. [2020-09-17 15:02:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:02:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 236 transitions. [2020-09-17 15:02:06,375 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 236 transitions. Word has length 33 [2020-09-17 15:02:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:06,375 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 236 transitions. [2020-09-17 15:02:06,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 236 transitions. [2020-09-17 15:02:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:06,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:06,376 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:06,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:06,585 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 161 times [2020-09-17 15:02:06,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:06,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593355204] [2020-09-17 15:02:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:07,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593355204] [2020-09-17 15:02:07,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449130777] [2020-09-17 15:02:07,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:02:07,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:02:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:07,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:07,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:07,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [191085767] [2020-09-17 15:02:07,334 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:07,336 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:07,344 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:07,344 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:07,347 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:07,347 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:07,407 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:07,408 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:07,420 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65816#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:02:07,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:07,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:07,421 INFO L87 Difference]: Start difference. First operand 94 states and 236 transitions. Second operand 30 states. [2020-09-17 15:02:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:09,391 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2020-09-17 15:02:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:02:09,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:09,393 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:02:09,393 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:02:09,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1193, Invalid=3499, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:02:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:02:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 96. [2020-09-17 15:02:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:02:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 242 transitions. [2020-09-17 15:02:09,396 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 242 transitions. Word has length 33 [2020-09-17 15:02:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:09,396 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 242 transitions. [2020-09-17 15:02:09,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 242 transitions. [2020-09-17 15:02:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:09,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:09,396 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:09,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:09,597 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 162 times [2020-09-17 15:02:09,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:09,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225255344] [2020-09-17 15:02:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:10,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225255344] [2020-09-17 15:02:10,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940733301] [2020-09-17 15:02:10,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 15:02:10,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:02:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:10,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:10,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:10,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350261902] [2020-09-17 15:02:10,341 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:10,343 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:10,371 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:10,371 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:10,371 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:10,372 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:10,437 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:10,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:10,457 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66375#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:02:10,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:10,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:10,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:10,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:10,458 INFO L87 Difference]: Start difference. First operand 96 states and 242 transitions. Second operand 30 states. [2020-09-17 15:02:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:12,876 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2020-09-17 15:02:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:02:12,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:12,878 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:02:12,878 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:02:12,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1280, Invalid=3690, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:02:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:02:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-09-17 15:02:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:02:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 248 transitions. [2020-09-17 15:02:12,881 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 248 transitions. Word has length 33 [2020-09-17 15:02:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:12,881 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 248 transitions. [2020-09-17 15:02:12,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 248 transitions. [2020-09-17 15:02:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:12,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:12,882 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:13,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:13,083 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 163 times [2020-09-17 15:02:13,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:13,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139403609] [2020-09-17 15:02:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:13,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139403609] [2020-09-17 15:02:13,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038113907] [2020-09-17 15:02:13,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:13,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:13,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:13,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [340888404] [2020-09-17 15:02:13,793 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:13,796 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:13,807 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:13,807 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:13,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:13,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:13,885 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:13,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:13,903 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66940#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:02:13,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:13,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:13,904 INFO L87 Difference]: Start difference. First operand 98 states and 248 transitions. Second operand 30 states. [2020-09-17 15:02:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:16,146 INFO L93 Difference]: Finished difference Result 159 states and 372 transitions. [2020-09-17 15:02:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:02:16,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:16,148 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:02:16,148 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:02:16,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1383, Invalid=3873, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:02:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:02:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 100. [2020-09-17 15:02:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:02:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 254 transitions. [2020-09-17 15:02:16,152 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 254 transitions. Word has length 33 [2020-09-17 15:02:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:16,152 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 254 transitions. [2020-09-17 15:02:16,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 254 transitions. [2020-09-17 15:02:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:16,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:16,153 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:16,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:16,354 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 164 times [2020-09-17 15:02:16,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:16,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374463151] [2020-09-17 15:02:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:16,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374463151] [2020-09-17 15:02:16,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939863057] [2020-09-17 15:02:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:17,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:17,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:17,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:17,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1069138444] [2020-09-17 15:02:17,063 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:17,065 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:17,074 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:17,074 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:17,075 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:17,075 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:17,135 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:17,136 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:17,150 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [67511#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:02:17,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:17,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:17,151 INFO L87 Difference]: Start difference. First operand 100 states and 254 transitions. Second operand 30 states. [2020-09-17 15:02:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:19,534 INFO L93 Difference]: Finished difference Result 157 states and 370 transitions. [2020-09-17 15:02:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:02:19,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:19,536 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:02:19,536 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:02:19,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1502, Invalid=4048, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:02:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:02:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 102. [2020-09-17 15:02:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:02:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 260 transitions. [2020-09-17 15:02:19,538 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 260 transitions. Word has length 33 [2020-09-17 15:02:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:19,539 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 260 transitions. [2020-09-17 15:02:19,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 260 transitions. [2020-09-17 15:02:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:19,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:19,539 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:19,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-17 15:02:19,740 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 165 times [2020-09-17 15:02:19,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:19,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829469674] [2020-09-17 15:02:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:20,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829469674] [2020-09-17 15:02:20,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029308146] [2020-09-17 15:02:20,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:20,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:02:20,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:20,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:20,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:20,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:20,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1212993089] [2020-09-17 15:02:20,484 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:20,486 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:20,496 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:20,496 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:20,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:20,497 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:20,559 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:20,559 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:20,572 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68088#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:02:20,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:20,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:20,573 INFO L87 Difference]: Start difference. First operand 102 states and 260 transitions. Second operand 30 states. [2020-09-17 15:02:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:23,109 INFO L93 Difference]: Finished difference Result 155 states and 368 transitions. [2020-09-17 15:02:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:02:23,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:23,111 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:02:23,111 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:02:23,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1637, Invalid=4215, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:02:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:02:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2020-09-17 15:02:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:02:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 266 transitions. [2020-09-17 15:02:23,114 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 266 transitions. Word has length 33 [2020-09-17 15:02:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:23,114 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 266 transitions. [2020-09-17 15:02:23,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 266 transitions. [2020-09-17 15:02:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:23,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:23,115 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:23,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 15:02:23,316 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 166 times [2020-09-17 15:02:23,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:23,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471163312] [2020-09-17 15:02:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:23,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471163312] [2020-09-17 15:02:23,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250901593] [2020-09-17 15:02:23,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:23,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:24,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:24,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:24,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521318754] [2020-09-17 15:02:24,028 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:24,030 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:24,039 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:24,039 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:24,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:24,040 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:24,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:24,098 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:24,113 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68671#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:02:24,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:24,114 INFO L87 Difference]: Start difference. First operand 104 states and 266 transitions. Second operand 30 states. [2020-09-17 15:02:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:26,753 INFO L93 Difference]: Finished difference Result 153 states and 366 transitions. [2020-09-17 15:02:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:02:26,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:26,755 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:02:26,755 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:02:26,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1788, Invalid=4374, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:02:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:02:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-09-17 15:02:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:02:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 272 transitions. [2020-09-17 15:02:26,758 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 272 transitions. Word has length 33 [2020-09-17 15:02:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:26,759 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 272 transitions. [2020-09-17 15:02:26,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 272 transitions. [2020-09-17 15:02:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:26,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:26,759 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:26,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:26,960 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 167 times [2020-09-17 15:02:26,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:26,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518090357] [2020-09-17 15:02:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518090357] [2020-09-17 15:02:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253060166] [2020-09-17 15:02:27,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:27,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:02:27,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:27,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:27,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:27,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:27,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593767454] [2020-09-17 15:02:27,675 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:27,677 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:27,685 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:27,686 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:27,686 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:27,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:27,747 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:27,748 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:27,762 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69260#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:02:27,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:27,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:27,763 INFO L87 Difference]: Start difference. First operand 106 states and 272 transitions. Second operand 30 states. [2020-09-17 15:02:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:30,517 INFO L93 Difference]: Finished difference Result 153 states and 369 transitions. [2020-09-17 15:02:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:02:30,518 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:30,519 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:02:30,519 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:02:30,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1955, Invalid=4525, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:02:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:02:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2020-09-17 15:02:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:02:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 280 transitions. [2020-09-17 15:02:30,522 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 280 transitions. Word has length 33 [2020-09-17 15:02:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:30,522 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 280 transitions. [2020-09-17 15:02:30,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 280 transitions. [2020-09-17 15:02:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:30,523 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:30,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 15:02:30,724 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 168 times [2020-09-17 15:02:30,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:30,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521452128] [2020-09-17 15:02:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:31,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521452128] [2020-09-17 15:02:31,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255221352] [2020-09-17 15:02:31,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:31,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:02:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:31,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:31,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:31,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [293234035] [2020-09-17 15:02:31,463 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:31,465 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:31,476 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:31,477 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:31,477 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:31,478 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:31,541 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:31,541 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:31,555 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69857#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:02:31,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:31,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:31,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:31,556 INFO L87 Difference]: Start difference. First operand 108 states and 280 transitions. Second operand 30 states. [2020-09-17 15:02:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:34,389 INFO L93 Difference]: Finished difference Result 154 states and 379 transitions. [2020-09-17 15:02:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 15:02:34,390 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:34,391 INFO L225 Difference]: With dead ends: 154 [2020-09-17 15:02:34,391 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 15:02:34,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2136, Invalid=4670, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:02:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 15:02:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2020-09-17 15:02:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:02:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-17 15:02:34,397 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 33 [2020-09-17 15:02:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:34,398 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-17 15:02:34,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-17 15:02:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:34,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:34,398 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:34,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 15:02:34,609 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 169 times [2020-09-17 15:02:34,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:34,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069342230] [2020-09-17 15:02:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:35,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069342230] [2020-09-17 15:02:35,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679913229] [2020-09-17 15:02:35,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:35,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:35,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [11902559] [2020-09-17 15:02:35,527 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:35,529 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:35,538 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 50 transitions. [2020-09-17 15:02:35,538 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:35,541 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:35,541 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:35,610 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:35,611 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:35,628 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70411#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:02:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:35,629 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 31 states. [2020-09-17 15:02:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:37,097 INFO L93 Difference]: Finished difference Result 150 states and 342 transitions. [2020-09-17 15:02:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:02:37,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:37,099 INFO L225 Difference]: With dead ends: 150 [2020-09-17 15:02:37,100 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 15:02:37,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1007, Invalid=2533, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:02:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 15:02:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2020-09-17 15:02:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:02:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 220 transitions. [2020-09-17 15:02:37,103 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 220 transitions. Word has length 34 [2020-09-17 15:02:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:37,103 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 220 transitions. [2020-09-17 15:02:37,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 220 transitions. [2020-09-17 15:02:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:37,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:37,104 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:37,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-17 15:02:37,313 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:37,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 170 times [2020-09-17 15:02:37,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:37,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630542683] [2020-09-17 15:02:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:38,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630542683] [2020-09-17 15:02:38,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972257617] [2020-09-17 15:02:38,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:38,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:38,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:38,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2130251832] [2020-09-17 15:02:38,202 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:38,204 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:38,213 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:38,213 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:38,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:38,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:38,278 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:38,279 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:38,297 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70927#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:02:38,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:38,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:38,298 INFO L87 Difference]: Start difference. First operand 89 states and 220 transitions. Second operand 31 states. [2020-09-17 15:02:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:39,903 INFO L93 Difference]: Finished difference Result 147 states and 338 transitions. [2020-09-17 15:02:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:02:39,904 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:39,905 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:02:39,905 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:02:39,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1015, Invalid=2767, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:02:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:02:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2020-09-17 15:02:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:02:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 226 transitions. [2020-09-17 15:02:39,907 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 226 transitions. Word has length 34 [2020-09-17 15:02:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:39,907 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 226 transitions. [2020-09-17 15:02:39,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 226 transitions. [2020-09-17 15:02:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:39,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:39,908 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:40,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:40,109 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 171 times [2020-09-17 15:02:40,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:40,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664567565] [2020-09-17 15:02:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:40,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664567565] [2020-09-17 15:02:40,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108857187] [2020-09-17 15:02:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:40,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:02:40,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:40,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:40,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:40,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1849664303] [2020-09-17 15:02:40,973 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:40,975 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:40,986 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:40,986 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:40,987 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:40,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:41,054 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:41,054 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:41,070 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71448#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:02:41,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:41,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:41,071 INFO L87 Difference]: Start difference. First operand 91 states and 226 transitions. Second operand 31 states. [2020-09-17 15:02:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:42,812 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-17 15:02:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:02:42,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:42,814 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:02:42,814 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:02:42,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1039, Invalid=2993, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:02:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:02:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2020-09-17 15:02:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:02:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 232 transitions. [2020-09-17 15:02:42,817 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 232 transitions. Word has length 34 [2020-09-17 15:02:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:42,817 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 232 transitions. [2020-09-17 15:02:42,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 232 transitions. [2020-09-17 15:02:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:42,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:42,817 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:43,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 15:02:43,019 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 172 times [2020-09-17 15:02:43,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:43,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557623246] [2020-09-17 15:02:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557623246] [2020-09-17 15:02:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658455854] [2020-09-17 15:02:43,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:43,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:43,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:43,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:43,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:43,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169185952] [2020-09-17 15:02:43,848 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:43,850 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:43,871 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:43,871 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:43,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:43,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:43,938 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:43,938 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:43,952 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71975#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:02:43,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:43,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:43,954 INFO L87 Difference]: Start difference. First operand 93 states and 232 transitions. Second operand 31 states. [2020-09-17 15:02:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:45,803 INFO L93 Difference]: Finished difference Result 143 states and 334 transitions. [2020-09-17 15:02:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:02:45,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:45,805 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:02:45,805 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:02:45,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1079, Invalid=3211, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:02:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:02:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2020-09-17 15:02:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:02:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 238 transitions. [2020-09-17 15:02:45,808 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 238 transitions. Word has length 34 [2020-09-17 15:02:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:45,809 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 238 transitions. [2020-09-17 15:02:45,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 238 transitions. [2020-09-17 15:02:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:45,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:45,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:46,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:46,010 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 173 times [2020-09-17 15:02:46,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:46,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870976542] [2020-09-17 15:02:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870976542] [2020-09-17 15:02:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162139490] [2020-09-17 15:02:46,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:46,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:02:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:46,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:46,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:46,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1532548396] [2020-09-17 15:02:46,858 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:46,861 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:46,871 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:46,871 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:46,872 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:46,872 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:46,938 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:46,939 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:46,955 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72508#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:02:46,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:46,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:46,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:46,956 INFO L87 Difference]: Start difference. First operand 95 states and 238 transitions. Second operand 31 states. [2020-09-17 15:02:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:49,007 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-17 15:02:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:02:49,009 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:49,009 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:02:49,009 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:02:49,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1135, Invalid=3421, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:02:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:02:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2020-09-17 15:02:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:02:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 244 transitions. [2020-09-17 15:02:49,012 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 244 transitions. Word has length 34 [2020-09-17 15:02:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:49,013 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 244 transitions. [2020-09-17 15:02:49,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 244 transitions. [2020-09-17 15:02:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:49,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:49,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:49,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:49,214 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 174 times [2020-09-17 15:02:49,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:49,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625787970] [2020-09-17 15:02:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:49,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625787970] [2020-09-17 15:02:49,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127769795] [2020-09-17 15:02:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:50,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:02:50,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:50,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:50,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:50,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:50,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1746507034] [2020-09-17 15:02:50,033 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:50,035 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:50,045 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:50,045 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:50,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:50,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:50,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:50,114 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:50,171 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73047#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:02:50,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:50,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:50,172 INFO L87 Difference]: Start difference. First operand 97 states and 244 transitions. Second operand 31 states. [2020-09-17 15:02:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:52,711 INFO L93 Difference]: Finished difference Result 139 states and 330 transitions. [2020-09-17 15:02:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:02:52,712 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:52,713 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:02:52,713 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:02:52,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1207, Invalid=3623, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:02:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:02:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-17 15:02:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:02:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 250 transitions. [2020-09-17 15:02:52,716 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 250 transitions. Word has length 34 [2020-09-17 15:02:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:52,716 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 250 transitions. [2020-09-17 15:02:52,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 250 transitions. [2020-09-17 15:02:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:52,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:52,716 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:52,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:52,917 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:52,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 175 times [2020-09-17 15:02:52,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:52,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214039280] [2020-09-17 15:02:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:53,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214039280] [2020-09-17 15:02:53,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811758863] [2020-09-17 15:02:53,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:53,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:53,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:53,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [512802797] [2020-09-17 15:02:53,726 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:53,728 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:53,738 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:53,738 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:53,740 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:53,740 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:53,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:53,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:53,824 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73592#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:02:53,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:53,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:53,825 INFO L87 Difference]: Start difference. First operand 99 states and 250 transitions. Second operand 31 states. [2020-09-17 15:02:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:56,184 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2020-09-17 15:02:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:02:56,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:56,187 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:02:56,187 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:02:56,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1295, Invalid=3817, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:02:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:02:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 15:02:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:02:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2020-09-17 15:02:56,190 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 34 [2020-09-17 15:02:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:56,190 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2020-09-17 15:02:56,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2020-09-17 15:02:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:56,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:56,191 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:56,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:56,392 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 176 times [2020-09-17 15:02:56,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:56,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986369955] [2020-09-17 15:02:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:57,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986369955] [2020-09-17 15:02:57,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603750948] [2020-09-17 15:02:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:57,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:02:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:57,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:57,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:02:57,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356695550] [2020-09-17 15:02:57,209 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:57,212 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:57,237 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:02:57,238 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:57,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:57,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:57,309 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:57,310 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:57,325 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74143#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:02:57,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:02:57,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:02:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:02:57,326 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand 31 states. [2020-09-17 15:02:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:59,824 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2020-09-17 15:02:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:02:59,826 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:02:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:59,827 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:02:59,827 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:02:59,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1399, Invalid=4003, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:02:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:02:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2020-09-17 15:02:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:02:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2020-09-17 15:02:59,829 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 34 [2020-09-17 15:02:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:59,830 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2020-09-17 15:02:59,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:02:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2020-09-17 15:02:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:02:59,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:59,830 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:00,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-17 15:03:00,032 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:00,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:00,032 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 177 times [2020-09-17 15:03:00,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:00,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137335551] [2020-09-17 15:03:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137335551] [2020-09-17 15:03:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084261339] [2020-09-17 15:03:00,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:00,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:03:00,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:00,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:00,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:00,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562709895] [2020-09-17 15:03:00,837 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:00,839 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:00,848 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:00,849 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:00,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:00,851 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:00,915 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:00,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:00,929 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74700#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:03:00,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:00,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:00,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:00,930 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand 31 states. [2020-09-17 15:03:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:03,584 INFO L93 Difference]: Finished difference Result 133 states and 324 transitions. [2020-09-17 15:03:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:03:03,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:03,586 INFO L225 Difference]: With dead ends: 133 [2020-09-17 15:03:03,586 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 15:03:03,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1519, Invalid=4181, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:03:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 15:03:03,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2020-09-17 15:03:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:03:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 268 transitions. [2020-09-17 15:03:03,589 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 268 transitions. Word has length 34 [2020-09-17 15:03:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:03,590 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 268 transitions. [2020-09-17 15:03:03,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 268 transitions. [2020-09-17 15:03:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:03,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:03,590 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:03,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 15:03:03,793 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 178 times [2020-09-17 15:03:03,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:03,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663534069] [2020-09-17 15:03:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:04,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663534069] [2020-09-17 15:03:04,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387127045] [2020-09-17 15:03:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:04,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:03:04,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:04,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:04,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:04,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [752355271] [2020-09-17 15:03:04,581 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:04,584 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:04,594 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:04,595 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:04,597 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:04,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:04,662 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:04,662 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:04,676 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75263#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:03:04,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:04,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:04,677 INFO L87 Difference]: Start difference. First operand 105 states and 268 transitions. Second operand 31 states. [2020-09-17 15:03:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:07,464 INFO L93 Difference]: Finished difference Result 131 states and 322 transitions. [2020-09-17 15:03:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:03:07,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:07,466 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:03:07,466 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:03:07,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1655, Invalid=4351, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:03:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:03:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2020-09-17 15:03:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:03:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 274 transitions. [2020-09-17 15:03:07,469 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 274 transitions. Word has length 34 [2020-09-17 15:03:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:07,470 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 274 transitions. [2020-09-17 15:03:07,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 274 transitions. [2020-09-17 15:03:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:07,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:07,470 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:07,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 15:03:07,671 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 179 times [2020-09-17 15:03:07,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:07,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000612409] [2020-09-17 15:03:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:08,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000612409] [2020-09-17 15:03:08,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794564397] [2020-09-17 15:03:08,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:08,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:03:08,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:08,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:08,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:08,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1118998940] [2020-09-17 15:03:08,484 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:08,486 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:08,497 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:08,497 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:08,499 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:08,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:08,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:08,568 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:08,582 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75832#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:03:08,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:08,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:08,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:08,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:08,584 INFO L87 Difference]: Start difference. First operand 107 states and 274 transitions. Second operand 31 states. [2020-09-17 15:03:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:11,569 INFO L93 Difference]: Finished difference Result 129 states and 320 transitions. [2020-09-17 15:03:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:03:11,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:11,571 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:03:11,571 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:03:11,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1807, Invalid=4513, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:03:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:03:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-09-17 15:03:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:03:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 280 transitions. [2020-09-17 15:03:11,574 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 280 transitions. Word has length 34 [2020-09-17 15:03:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:11,574 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 280 transitions. [2020-09-17 15:03:11,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 280 transitions. [2020-09-17 15:03:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:11,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:11,575 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:11,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:11,776 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 180 times [2020-09-17 15:03:11,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:11,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497230762] [2020-09-17 15:03:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497230762] [2020-09-17 15:03:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515499304] [2020-09-17 15:03:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:12,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:03:12,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:12,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:12,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:12,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419457130] [2020-09-17 15:03:12,573 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:12,575 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:12,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:12,585 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:12,586 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:12,586 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:12,652 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:12,652 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:12,668 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76407#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:03:12,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:12,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:12,670 INFO L87 Difference]: Start difference. First operand 109 states and 280 transitions. Second operand 31 states. [2020-09-17 15:03:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:15,799 INFO L93 Difference]: Finished difference Result 129 states and 323 transitions. [2020-09-17 15:03:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:03:15,801 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:15,801 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:03:15,802 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:03:15,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1975, Invalid=4667, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:03:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:03:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2020-09-17 15:03:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:03:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 288 transitions. [2020-09-17 15:03:15,804 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 288 transitions. Word has length 34 [2020-09-17 15:03:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:15,805 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 288 transitions. [2020-09-17 15:03:15,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 288 transitions. [2020-09-17 15:03:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:15,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:15,805 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:16,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:16,006 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 181 times [2020-09-17 15:03:16,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:16,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643073266] [2020-09-17 15:03:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:16,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643073266] [2020-09-17 15:03:16,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138739858] [2020-09-17 15:03:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:16,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:16,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:16,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1503284549] [2020-09-17 15:03:16,805 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:16,807 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:16,817 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:16,818 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:16,818 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:16,818 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:16,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:16,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:16,900 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76990#(and (<= ~j~0 32) (< ~i~0 46))] [2020-09-17 15:03:16,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:16,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:16,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:16,901 INFO L87 Difference]: Start difference. First operand 111 states and 288 transitions. Second operand 31 states. [2020-09-17 15:03:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:20,073 INFO L93 Difference]: Finished difference Result 129 states and 331 transitions. [2020-09-17 15:03:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 15:03:20,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:20,075 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:03:20,075 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:03:20,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2157, Invalid=4815, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:03:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:03:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2020-09-17 15:03:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:03:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-17 15:03:20,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 34 [2020-09-17 15:03:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:20,078 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-17 15:03:20,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-17 15:03:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:20,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:20,079 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:20,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:20,280 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 182 times [2020-09-17 15:03:20,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:20,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866061304] [2020-09-17 15:03:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:21,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866061304] [2020-09-17 15:03:21,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864085647] [2020-09-17 15:03:21,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:21,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:03:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:21,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:21,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:21,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1118336112] [2020-09-17 15:03:21,283 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:21,285 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:21,296 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-17 15:03:21,296 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:21,297 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,297 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,420 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,437 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,437 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,480 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,507 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [77523#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 15:03:21,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:21,509 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 32 states. [2020-09-17 15:03:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:23,192 INFO L93 Difference]: Finished difference Result 126 states and 294 transitions. [2020-09-17 15:03:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:03:23,193 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:23,193 INFO L225 Difference]: With dead ends: 126 [2020-09-17 15:03:23,194 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 15:03:23,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1081, Invalid=2579, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:03:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 15:03:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-09-17 15:03:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:03:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-17 15:03:23,197 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 35 [2020-09-17 15:03:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:23,197 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-17 15:03:23,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-17 15:03:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:23,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:23,197 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:23,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:23,398 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 183 times [2020-09-17 15:03:23,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:23,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584928238] [2020-09-17 15:03:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:24,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584928238] [2020-09-17 15:03:24,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558299906] [2020-09-17 15:03:24,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:24,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:03:24,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:24,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:24,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:24,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [413402371] [2020-09-17 15:03:24,388 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:24,391 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:24,405 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:24,405 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:24,407 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:24,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:24,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:24,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:24,496 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78021#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 15:03:24,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:24,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:24,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:24,497 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 32 states. [2020-09-17 15:03:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:26,298 INFO L93 Difference]: Finished difference Result 182 states and 408 transitions. [2020-09-17 15:03:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:03:26,300 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:26,300 INFO L225 Difference]: With dead ends: 182 [2020-09-17 15:03:26,301 INFO L226 Difference]: Without dead ends: 176 [2020-09-17 15:03:26,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1148, Invalid=3012, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:03:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-17 15:03:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2020-09-17 15:03:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:03:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2020-09-17 15:03:26,303 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 35 [2020-09-17 15:03:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:26,304 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2020-09-17 15:03:26,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2020-09-17 15:03:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:26,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:26,304 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:26,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:26,505 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 184 times [2020-09-17 15:03:26,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:26,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316882658] [2020-09-17 15:03:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316882658] [2020-09-17 15:03:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932224399] [2020-09-17 15:03:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:27,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:03:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:27,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:27,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:27,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383793129] [2020-09-17 15:03:27,486 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:27,489 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:27,499 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:27,499 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:27,500 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:27,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:27,570 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:27,571 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:27,585 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78587#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:03:27,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:27,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:27,586 INFO L87 Difference]: Start difference. First operand 92 states and 228 transitions. Second operand 32 states. [2020-09-17 15:03:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:29,487 INFO L93 Difference]: Finished difference Result 179 states and 404 transitions. [2020-09-17 15:03:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:03:29,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:29,489 INFO L225 Difference]: With dead ends: 179 [2020-09-17 15:03:29,489 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 15:03:29,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1169, Invalid=3253, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:03:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 15:03:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2020-09-17 15:03:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:03:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 234 transitions. [2020-09-17 15:03:29,492 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 234 transitions. Word has length 35 [2020-09-17 15:03:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:29,492 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 234 transitions. [2020-09-17 15:03:29,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 234 transitions. [2020-09-17 15:03:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:29,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:29,492 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:29,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:29,694 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 185 times [2020-09-17 15:03:29,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:29,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175824711] [2020-09-17 15:03:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:30,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175824711] [2020-09-17 15:03:30,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851769185] [2020-09-17 15:03:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:30,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:03:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:30,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:30,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:30,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:30,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:30,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1923321142] [2020-09-17 15:03:30,631 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:30,633 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:30,643 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:30,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:30,647 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:30,647 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:30,716 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:30,716 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:30,730 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79158#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:03:30,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:30,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:30,731 INFO L87 Difference]: Start difference. First operand 94 states and 234 transitions. Second operand 32 states. [2020-09-17 15:03:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:32,794 INFO L93 Difference]: Finished difference Result 177 states and 402 transitions. [2020-09-17 15:03:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:03:32,796 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:32,797 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:03:32,797 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:03:32,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1206, Invalid=3486, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:03:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:03:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 96. [2020-09-17 15:03:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:03:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 240 transitions. [2020-09-17 15:03:32,800 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 240 transitions. Word has length 35 [2020-09-17 15:03:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:32,800 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 240 transitions. [2020-09-17 15:03:32,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 240 transitions. [2020-09-17 15:03:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:32,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:32,800 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:33,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:33,001 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 186 times [2020-09-17 15:03:33,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:33,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121337132] [2020-09-17 15:03:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:33,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121337132] [2020-09-17 15:03:33,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541281152] [2020-09-17 15:03:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:33,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:03:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:33,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:33,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:33,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [470619368] [2020-09-17 15:03:33,935 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:33,938 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:33,949 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:33,949 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:33,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:33,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:34,046 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:34,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:34,062 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79735#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:03:34,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:34,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:34,063 INFO L87 Difference]: Start difference. First operand 96 states and 240 transitions. Second operand 32 states. [2020-09-17 15:03:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:36,359 INFO L93 Difference]: Finished difference Result 175 states and 400 transitions. [2020-09-17 15:03:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:03:36,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:36,361 INFO L225 Difference]: With dead ends: 175 [2020-09-17 15:03:36,361 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 15:03:36,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1259, Invalid=3711, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:03:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 15:03:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2020-09-17 15:03:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:03:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 246 transitions. [2020-09-17 15:03:36,364 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 246 transitions. Word has length 35 [2020-09-17 15:03:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:36,365 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 246 transitions. [2020-09-17 15:03:36,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 246 transitions. [2020-09-17 15:03:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:36,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:36,365 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:36,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:36,566 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 187 times [2020-09-17 15:03:36,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:36,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772216373] [2020-09-17 15:03:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:37,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772216373] [2020-09-17 15:03:37,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549438121] [2020-09-17 15:03:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:37,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:37,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:37,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1834930242] [2020-09-17 15:03:37,494 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:37,496 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:37,530 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:37,530 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:37,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:37,534 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:37,605 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:37,605 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:37,617 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80318#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:03:37,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:37,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:37,618 INFO L87 Difference]: Start difference. First operand 98 states and 246 transitions. Second operand 32 states. [2020-09-17 15:03:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:39,972 INFO L93 Difference]: Finished difference Result 173 states and 398 transitions. [2020-09-17 15:03:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:03:39,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:39,974 INFO L225 Difference]: With dead ends: 173 [2020-09-17 15:03:39,974 INFO L226 Difference]: Without dead ends: 167 [2020-09-17 15:03:39,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1328, Invalid=3928, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:03:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-17 15:03:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 100. [2020-09-17 15:03:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:03:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 252 transitions. [2020-09-17 15:03:39,977 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 252 transitions. Word has length 35 [2020-09-17 15:03:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:39,978 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 252 transitions. [2020-09-17 15:03:39,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 252 transitions. [2020-09-17 15:03:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:39,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:39,978 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:40,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:40,179 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:40,180 INFO L82 PathProgramCache]: Analyzing trace with hash 805590871, now seen corresponding path program 188 times [2020-09-17 15:03:40,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:40,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734943867] [2020-09-17 15:03:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:40,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734943867] [2020-09-17 15:03:40,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489362355] [2020-09-17 15:03:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:41,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:03:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:41,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:41,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:41,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:41,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289782003] [2020-09-17 15:03:41,069 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:41,071 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:41,081 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:41,081 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:41,082 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:41,082 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:41,156 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:41,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:41,172 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80907#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:03:41,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:41,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:41,173 INFO L87 Difference]: Start difference. First operand 100 states and 252 transitions. Second operand 32 states. [2020-09-17 15:03:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:43,695 INFO L93 Difference]: Finished difference Result 171 states and 396 transitions. [2020-09-17 15:03:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:03:43,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:43,697 INFO L225 Difference]: With dead ends: 171 [2020-09-17 15:03:43,697 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 15:03:43,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1413, Invalid=4137, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:03:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 15:03:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 102. [2020-09-17 15:03:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:03:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 258 transitions. [2020-09-17 15:03:43,700 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 258 transitions. Word has length 35 [2020-09-17 15:03:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:43,700 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 258 transitions. [2020-09-17 15:03:43,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 258 transitions. [2020-09-17 15:03:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:43,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:43,701 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:43,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 15:03:43,902 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 47318841, now seen corresponding path program 189 times [2020-09-17 15:03:43,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:43,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132268002] [2020-09-17 15:03:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:44,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132268002] [2020-09-17 15:03:44,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458762306] [2020-09-17 15:03:44,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:44,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:03:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:44,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:44,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:44,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1047599321] [2020-09-17 15:03:44,804 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:44,806 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:44,816 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:44,817 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:44,820 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:44,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:44,892 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:44,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:45,116 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [81502#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:03:45,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:45,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:45,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:45,117 INFO L87 Difference]: Start difference. First operand 102 states and 258 transitions. Second operand 32 states. [2020-09-17 15:03:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:47,752 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-17 15:03:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:03:47,753 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:47,754 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:03:47,754 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:03:47,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:03:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:03:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2020-09-17 15:03:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:03:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-09-17 15:03:47,757 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 35 [2020-09-17 15:03:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:47,757 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-09-17 15:03:47,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-09-17 15:03:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:47,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:47,758 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:47,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:47,962 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1683077221, now seen corresponding path program 190 times [2020-09-17 15:03:47,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:47,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243362729] [2020-09-17 15:03:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:48,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243362729] [2020-09-17 15:03:48,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640934555] [2020-09-17 15:03:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:48,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:03:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:48,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:48,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:48,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [564204778] [2020-09-17 15:03:48,847 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:48,866 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:48,883 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:48,883 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:48,890 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:48,890 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:48,971 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:48,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:48,988 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82103#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:03:48,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:48,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:48,990 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 32 states. [2020-09-17 15:03:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:51,900 INFO L93 Difference]: Finished difference Result 167 states and 392 transitions. [2020-09-17 15:03:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:03:51,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:51,903 INFO L225 Difference]: With dead ends: 167 [2020-09-17 15:03:51,903 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 15:03:51,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1631, Invalid=4531, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:03:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 15:03:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 106. [2020-09-17 15:03:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:03:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-09-17 15:03:51,907 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 35 [2020-09-17 15:03:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:51,907 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-09-17 15:03:51,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-09-17 15:03:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:51,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:51,908 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:52,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-17 15:03:52,111 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1979922557, now seen corresponding path program 191 times [2020-09-17 15:03:52,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:52,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820986920] [2020-09-17 15:03:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:52,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820986920] [2020-09-17 15:03:52,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350521557] [2020-09-17 15:03:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:52,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:03:52,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:53,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:53,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:53,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [552266271] [2020-09-17 15:03:53,004 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:53,006 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:53,017 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:53,017 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:53,021 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:53,021 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:53,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:53,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:53,105 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82710#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:03:53,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:53,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:53,106 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 32 states. [2020-09-17 15:03:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:55,913 INFO L93 Difference]: Finished difference Result 165 states and 390 transitions. [2020-09-17 15:03:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:03:55,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:03:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:55,916 INFO L225 Difference]: With dead ends: 165 [2020-09-17 15:03:55,916 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 15:03:55,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1764, Invalid=4716, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:03:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 15:03:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2020-09-17 15:03:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:03:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 276 transitions. [2020-09-17 15:03:55,919 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 276 transitions. Word has length 35 [2020-09-17 15:03:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:55,919 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 276 transitions. [2020-09-17 15:03:55,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:03:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 276 transitions. [2020-09-17 15:03:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:03:55,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:55,920 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:56,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:56,121 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 558037471, now seen corresponding path program 192 times [2020-09-17 15:03:56,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:56,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819136204] [2020-09-17 15:03:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:56,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819136204] [2020-09-17 15:03:56,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616374496] [2020-09-17 15:03:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:56,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:03:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:03:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:56,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:56,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:03:56,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973389141] [2020-09-17 15:03:56,959 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:56,972 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:56,982 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:03:56,982 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:56,983 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:56,983 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:57,049 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:57,049 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:57,064 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83323#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:03:57,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:03:57,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:03:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:03:57,065 INFO L87 Difference]: Start difference. First operand 108 states and 276 transitions. Second operand 32 states. [2020-09-17 15:04:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:00,011 INFO L93 Difference]: Finished difference Result 163 states and 388 transitions. [2020-09-17 15:04:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:04:00,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:00,013 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:04:00,013 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:04:00,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1913, Invalid=4893, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:04:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:04:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-09-17 15:04:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:04:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 282 transitions. [2020-09-17 15:04:00,016 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 282 transitions. Word has length 35 [2020-09-17 15:04:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:00,016 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 282 transitions. [2020-09-17 15:04:00,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 282 transitions. [2020-09-17 15:04:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:00,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:00,016 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:00,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:00,217 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1561875519, now seen corresponding path program 193 times [2020-09-17 15:04:00,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:00,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177772912] [2020-09-17 15:04:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:00,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177772912] [2020-09-17 15:04:00,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313128900] [2020-09-17 15:04:00,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:01,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:01,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:01,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1160216978] [2020-09-17 15:04:01,054 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:01,056 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:01,065 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:01,065 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:01,066 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:01,066 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:01,148 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:01,149 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:01,162 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83942#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:04:01,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:01,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:01,163 INFO L87 Difference]: Start difference. First operand 110 states and 282 transitions. Second operand 32 states. [2020-09-17 15:04:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:04,208 INFO L93 Difference]: Finished difference Result 161 states and 386 transitions. [2020-09-17 15:04:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:04:04,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:04,210 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:04:04,210 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:04:04,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2078, Invalid=5062, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:04:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:04:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2020-09-17 15:04:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:04:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 288 transitions. [2020-09-17 15:04:04,213 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 288 transitions. Word has length 35 [2020-09-17 15:04:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:04,213 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 288 transitions. [2020-09-17 15:04:04,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 288 transitions. [2020-09-17 15:04:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:04,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:04,214 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:04,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-17 15:04:04,415 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1483959843, now seen corresponding path program 194 times [2020-09-17 15:04:04,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:04,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143257229] [2020-09-17 15:04:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:05,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143257229] [2020-09-17 15:04:05,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484053308] [2020-09-17 15:04:05,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:05,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:05,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:05,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:05,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682229485] [2020-09-17 15:04:05,232 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:05,234 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:05,243 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:05,243 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:05,243 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:05,243 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:05,307 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:05,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:05,321 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [84567#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:04:05,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:05,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:05,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:05,322 INFO L87 Difference]: Start difference. First operand 112 states and 288 transitions. Second operand 32 states. [2020-09-17 15:04:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:08,496 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-09-17 15:04:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:04:08,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:08,499 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:04:08,499 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:04:08,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2259, Invalid=5223, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:04:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:04:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2020-09-17 15:04:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:04:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 296 transitions. [2020-09-17 15:04:08,502 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 296 transitions. Word has length 35 [2020-09-17 15:04:08,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:08,502 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 296 transitions. [2020-09-17 15:04:08,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 296 transitions. [2020-09-17 15:04:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:08,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:08,503 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:08,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:08,704 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1500537093, now seen corresponding path program 195 times [2020-09-17 15:04:08,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:08,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107909314] [2020-09-17 15:04:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:09,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107909314] [2020-09-17 15:04:09,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876227174] [2020-09-17 15:04:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:09,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:09,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:09,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:09,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:09,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1742647034] [2020-09-17 15:04:09,546 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:09,549 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:09,558 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:09,558 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:09,559 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:09,559 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:09,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:09,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:09,639 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85200#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:04:09,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:09,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:09,640 INFO L87 Difference]: Start difference. First operand 114 states and 296 transitions. Second operand 32 states. [2020-09-17 15:04:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:12,935 INFO L93 Difference]: Finished difference Result 162 states and 399 transitions. [2020-09-17 15:04:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-17 15:04:12,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:12,937 INFO L225 Difference]: With dead ends: 162 [2020-09-17 15:04:12,937 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 15:04:12,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2454, Invalid=5378, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:04:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 15:04:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2020-09-17 15:04:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:04:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-17 15:04:12,940 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 35 [2020-09-17 15:04:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:12,940 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-17 15:04:12,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-17 15:04:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:12,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:12,941 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:13,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:13,142 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 581302646, now seen corresponding path program 196 times [2020-09-17 15:04:13,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:13,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044048299] [2020-09-17 15:04:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:14,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044048299] [2020-09-17 15:04:14,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687127121] [2020-09-17 15:04:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:14,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:04:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:14,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:14,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:14,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1909818902] [2020-09-17 15:04:14,195 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:14,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:14,208 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 52 transitions. [2020-09-17 15:04:14,208 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:14,208 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:14,209 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:14,281 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:14,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:14,299 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85786#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:04:14,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:14,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:14,300 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 33 states. [2020-09-17 15:04:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:15,954 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2020-09-17 15:04:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:04:15,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:15,955 INFO L225 Difference]: With dead ends: 158 [2020-09-17 15:04:15,955 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 15:04:15,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1152, Invalid=2880, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:04:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 15:04:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 93. [2020-09-17 15:04:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:04:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 230 transitions. [2020-09-17 15:04:15,958 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 230 transitions. Word has length 36 [2020-09-17 15:04:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:15,958 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 230 transitions. [2020-09-17 15:04:15,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 230 transitions. [2020-09-17 15:04:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:15,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:15,959 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:16,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:16,160 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1259398744, now seen corresponding path program 197 times [2020-09-17 15:04:16,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:16,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801393555] [2020-09-17 15:04:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:17,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801393555] [2020-09-17 15:04:17,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853783233] [2020-09-17 15:04:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:17,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:04:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:17,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:17,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:17,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2060503349] [2020-09-17 15:04:17,162 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:17,164 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:17,173 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:17,174 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:17,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:17,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:17,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:17,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:17,284 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86330#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:04:17,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:17,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:17,285 INFO L87 Difference]: Start difference. First operand 93 states and 230 transitions. Second operand 33 states. [2020-09-17 15:04:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:19,052 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-17 15:04:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:04:19,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:19,054 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:04:19,054 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:04:19,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1158, Invalid=3132, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:04:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:04:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2020-09-17 15:04:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:04:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 236 transitions. [2020-09-17 15:04:19,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 236 transitions. Word has length 36 [2020-09-17 15:04:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:19,057 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 236 transitions. [2020-09-17 15:04:19,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 236 transitions. [2020-09-17 15:04:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:19,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:19,058 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:19,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 15:04:19,264 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1984584774, now seen corresponding path program 198 times [2020-09-17 15:04:19,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:19,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959357295] [2020-09-17 15:04:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959357295] [2020-09-17 15:04:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637663776] [2020-09-17 15:04:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:20,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:04:20,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:20,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:20,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:20,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:20,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1206526847] [2020-09-17 15:04:20,252 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:20,254 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:20,263 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:20,263 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:20,265 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:20,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:20,335 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:20,335 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:20,350 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86879#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:04:20,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:20,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:20,351 INFO L87 Difference]: Start difference. First operand 95 states and 236 transitions. Second operand 33 states. [2020-09-17 15:04:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:22,291 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-17 15:04:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:04:22,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:22,293 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:04:22,293 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:04:22,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:04:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:04:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2020-09-17 15:04:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:04:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 242 transitions. [2020-09-17 15:04:22,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 242 transitions. Word has length 36 [2020-09-17 15:04:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:22,297 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 242 transitions. [2020-09-17 15:04:22,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 242 transitions. [2020-09-17 15:04:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:22,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:22,297 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:22,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 15:04:22,498 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -338800228, now seen corresponding path program 199 times [2020-09-17 15:04:22,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:22,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882646485] [2020-09-17 15:04:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:23,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882646485] [2020-09-17 15:04:23,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821075630] [2020-09-17 15:04:23,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:23,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:23,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:23,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158964978] [2020-09-17 15:04:23,451 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:23,453 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:23,462 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:23,463 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:23,463 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:23,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:23,537 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:23,538 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:23,555 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87434#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:04:23,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:23,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:23,555 INFO L87 Difference]: Start difference. First operand 97 states and 242 transitions. Second operand 33 states. [2020-09-17 15:04:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:25,633 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-17 15:04:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:04:25,634 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:25,635 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:04:25,635 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:04:25,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1218, Invalid=3612, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:04:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:04:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 99. [2020-09-17 15:04:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:04:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 248 transitions. [2020-09-17 15:04:25,638 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 248 transitions. Word has length 36 [2020-09-17 15:04:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:25,638 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 248 transitions. [2020-09-17 15:04:25,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 248 transitions. [2020-09-17 15:04:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:25,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:25,639 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:25,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:25,840 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -962785282, now seen corresponding path program 200 times [2020-09-17 15:04:25,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:25,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422458799] [2020-09-17 15:04:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:26,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422458799] [2020-09-17 15:04:26,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102700975] [2020-09-17 15:04:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:26,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:26,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:26,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:26,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:26,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1813168153] [2020-09-17 15:04:26,775 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:26,778 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:26,790 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:26,790 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:26,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:26,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:26,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:26,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:26,917 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87995#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:04:26,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:26,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:26,918 INFO L87 Difference]: Start difference. First operand 99 states and 248 transitions. Second operand 33 states. [2020-09-17 15:04:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:29,180 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 15:04:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:04:29,182 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:29,182 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:04:29,182 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:04:29,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1272, Invalid=3840, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:04:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:04:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2020-09-17 15:04:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:04:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 254 transitions. [2020-09-17 15:04:29,186 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 254 transitions. Word has length 36 [2020-09-17 15:04:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:29,186 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 254 transitions. [2020-09-17 15:04:29,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 254 transitions. [2020-09-17 15:04:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:29,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:29,187 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:29,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 15:04:29,395 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 426508000, now seen corresponding path program 201 times [2020-09-17 15:04:29,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:29,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326419208] [2020-09-17 15:04:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:30,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326419208] [2020-09-17 15:04:30,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22370042] [2020-09-17 15:04:30,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:30,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:30,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:30,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:30,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [53716698] [2020-09-17 15:04:30,303 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:30,305 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:30,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:30,315 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:30,315 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:30,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:30,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:30,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:30,402 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [88562#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:04:30,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:30,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:30,403 INFO L87 Difference]: Start difference. First operand 101 states and 254 transitions. Second operand 33 states. [2020-09-17 15:04:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:32,816 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-17 15:04:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:04:32,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:32,817 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:04:32,817 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:04:32,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1342, Invalid=4060, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:04:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:04:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2020-09-17 15:04:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:04:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 260 transitions. [2020-09-17 15:04:32,820 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 260 transitions. Word has length 36 [2020-09-17 15:04:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:32,820 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 260 transitions. [2020-09-17 15:04:32,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 260 transitions. [2020-09-17 15:04:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:32,821 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:33,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-17 15:04:33,028 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1871527490, now seen corresponding path program 202 times [2020-09-17 15:04:33,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:33,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694252697] [2020-09-17 15:04:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:33,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694252697] [2020-09-17 15:04:33,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670055110] [2020-09-17 15:04:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:33,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:04:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:33,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:33,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:33,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1863489288] [2020-09-17 15:04:33,925 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:33,927 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:33,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:33,938 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:33,939 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:33,939 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:34,010 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:34,011 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:34,027 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89135#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:04:34,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:34,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:34,028 INFO L87 Difference]: Start difference. First operand 103 states and 260 transitions. Second operand 33 states. [2020-09-17 15:04:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:36,565 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 15:04:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:04:36,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:36,567 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:04:36,567 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:04:36,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:04:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:04:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 105. [2020-09-17 15:04:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:04:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 266 transitions. [2020-09-17 15:04:36,569 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 266 transitions. Word has length 36 [2020-09-17 15:04:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:36,569 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 266 transitions. [2020-09-17 15:04:36,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 266 transitions. [2020-09-17 15:04:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:36,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:36,570 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:36,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 15:04:36,771 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1113255460, now seen corresponding path program 203 times [2020-09-17 15:04:36,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:36,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601441458] [2020-09-17 15:04:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:37,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601441458] [2020-09-17 15:04:37,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591392318] [2020-09-17 15:04:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:37,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:04:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:37,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:37,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:37,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115491295] [2020-09-17 15:04:37,677 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:37,679 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:37,689 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:37,689 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:37,690 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:37,690 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:37,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:37,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:37,777 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89714#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:04:37,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:37,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:37,778 INFO L87 Difference]: Start difference. First operand 105 states and 266 transitions. Second operand 33 states. [2020-09-17 15:04:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:40,522 INFO L93 Difference]: Finished difference Result 143 states and 344 transitions. [2020-09-17 15:04:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:04:40,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:40,523 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:04:40,523 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:04:40,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1530, Invalid=4476, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:04:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:04:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-09-17 15:04:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:04:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 272 transitions. [2020-09-17 15:04:40,527 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 272 transitions. Word has length 36 [2020-09-17 15:04:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:40,527 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 272 transitions. [2020-09-17 15:04:40,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 272 transitions. [2020-09-17 15:04:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:40,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:40,527 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:40,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:40,728 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -617140602, now seen corresponding path program 204 times [2020-09-17 15:04:40,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:40,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261859546] [2020-09-17 15:04:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:41,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261859546] [2020-09-17 15:04:41,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997377852] [2020-09-17 15:04:41,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:41,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:04:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:41,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:41,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:41,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [455475592] [2020-09-17 15:04:41,599 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:41,602 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:41,639 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:41,640 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:41,640 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:41,640 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:41,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:41,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:41,728 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90299#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:04:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:41,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:41,729 INFO L87 Difference]: Start difference. First operand 107 states and 272 transitions. Second operand 33 states. [2020-09-17 15:04:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:44,621 INFO L93 Difference]: Finished difference Result 141 states and 342 transitions. [2020-09-17 15:04:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:04:44,623 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:44,623 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:04:44,623 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:04:44,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1648, Invalid=4672, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:04:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:04:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-09-17 15:04:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:04:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 278 transitions. [2020-09-17 15:04:44,626 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 278 transitions. Word has length 36 [2020-09-17 15:04:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:44,627 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 278 transitions. [2020-09-17 15:04:44,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 278 transitions. [2020-09-17 15:04:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:44,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:44,627 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:44,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 15:04:44,828 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1249108120, now seen corresponding path program 205 times [2020-09-17 15:04:44,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:44,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672970431] [2020-09-17 15:04:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:45,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672970431] [2020-09-17 15:04:45,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547289789] [2020-09-17 15:04:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:45,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:45,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:45,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:45,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:45,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1402765988] [2020-09-17 15:04:45,690 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:45,692 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:45,702 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:45,702 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:45,702 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:45,703 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:45,772 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:45,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:45,790 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90890#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:04:45,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:45,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:45,791 INFO L87 Difference]: Start difference. First operand 109 states and 278 transitions. Second operand 33 states. [2020-09-17 15:04:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:48,790 INFO L93 Difference]: Finished difference Result 139 states and 340 transitions. [2020-09-17 15:04:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:04:48,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:48,792 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:04:48,792 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:04:48,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1782, Invalid=4860, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:04:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:04:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2020-09-17 15:04:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:04:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 284 transitions. [2020-09-17 15:04:48,796 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 284 transitions. Word has length 36 [2020-09-17 15:04:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:48,796 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 284 transitions. [2020-09-17 15:04:48,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 284 transitions. [2020-09-17 15:04:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:48,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:48,797 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:49,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:49,005 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1623974090, now seen corresponding path program 206 times [2020-09-17 15:04:49,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:49,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856922521] [2020-09-17 15:04:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:49,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856922521] [2020-09-17 15:04:49,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839388569] [2020-09-17 15:04:49,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:49,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:49,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:49,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:49,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:49,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1229348466] [2020-09-17 15:04:49,918 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:49,920 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:49,930 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:49,930 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:49,931 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:49,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:50,000 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:50,000 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:50,015 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [91487#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:04:50,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:50,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:50,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:50,017 INFO L87 Difference]: Start difference. First operand 111 states and 284 transitions. Second operand 33 states. [2020-09-17 15:04:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:53,194 INFO L93 Difference]: Finished difference Result 137 states and 338 transitions. [2020-09-17 15:04:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:04:53,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:53,197 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:04:53,197 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:04:53,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1932, Invalid=5040, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:04:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:04:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2020-09-17 15:04:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 15:04:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 290 transitions. [2020-09-17 15:04:53,200 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 290 transitions. Word has length 36 [2020-09-17 15:04:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:53,200 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 290 transitions. [2020-09-17 15:04:53,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 290 transitions. [2020-09-17 15:04:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:53,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:53,201 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:53,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:53,402 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash -495938900, now seen corresponding path program 207 times [2020-09-17 15:04:53,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:53,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973491026] [2020-09-17 15:04:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:54,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973491026] [2020-09-17 15:04:54,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533842988] [2020-09-17 15:04:54,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:54,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:54,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:54,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:54,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:54,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [176025587] [2020-09-17 15:04:54,299 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:54,302 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:54,312 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:54,313 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:54,315 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:54,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:54,396 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:54,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:54,414 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92090#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:04:54,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:54,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:54,415 INFO L87 Difference]: Start difference. First operand 113 states and 290 transitions. Second operand 33 states. [2020-09-17 15:04:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:57,791 INFO L93 Difference]: Finished difference Result 135 states and 336 transitions. [2020-09-17 15:04:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:04:57,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:04:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:57,793 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:04:57,793 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:04:57,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2098, Invalid=5212, Unknown=0, NotChecked=0, Total=7310 [2020-09-17 15:04:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:04:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2020-09-17 15:04:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 15:04:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 296 transitions. [2020-09-17 15:04:57,798 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 296 transitions. Word has length 36 [2020-09-17 15:04:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:57,798 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 296 transitions. [2020-09-17 15:04:57,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:04:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 296 transitions. [2020-09-17 15:04:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:04:57,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:57,799 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2020-09-17 15:04:58,006 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1745070834, now seen corresponding path program 208 times [2020-09-17 15:04:58,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148159282] [2020-09-17 15:04:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:58,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148159282] [2020-09-17 15:04:58,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577549008] [2020-09-17 15:04:58,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:58,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:04:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:58,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:04:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:58,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:58,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:04:58,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1819394572] [2020-09-17 15:04:58,890 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:58,892 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:58,902 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:04:58,903 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:58,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:58,903 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:58,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:58,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:58,990 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92699#(and (<= ~j~0 32) (< ~i~0 46))] [2020-09-17 15:04:58,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:04:58,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:04:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:04:58,991 INFO L87 Difference]: Start difference. First operand 115 states and 296 transitions. Second operand 33 states. [2020-09-17 15:05:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:02,570 INFO L93 Difference]: Finished difference Result 135 states and 339 transitions. [2020-09-17 15:05:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:05:02,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:02,573 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:05:02,573 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:05:02,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2280, Invalid=5376, Unknown=0, NotChecked=0, Total=7656 [2020-09-17 15:05:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:05:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-09-17 15:05:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 15:05:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 304 transitions. [2020-09-17 15:05:02,576 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 304 transitions. Word has length 36 [2020-09-17 15:05:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:02,576 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 304 transitions. [2020-09-17 15:05:02,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 304 transitions. [2020-09-17 15:05:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:02,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:02,577 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:02,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:02,786 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1728493584, now seen corresponding path program 209 times [2020-09-17 15:05:02,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:02,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542277664] [2020-09-17 15:05:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:03,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542277664] [2020-09-17 15:05:03,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790258312] [2020-09-17 15:05:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:03,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:05:03,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:03,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:03,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:03,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:03,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [160504306] [2020-09-17 15:05:03,686 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:03,688 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:03,698 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:03,698 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:03,700 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:03,701 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:03,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:03,770 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:03,786 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93316#(and (<= ~j~0 34) (< ~i~0 46))] [2020-09-17 15:05:03,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:03,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:03,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:03,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:03,787 INFO L87 Difference]: Start difference. First operand 117 states and 304 transitions. Second operand 33 states. [2020-09-17 15:05:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:07,451 INFO L93 Difference]: Finished difference Result 135 states and 347 transitions. [2020-09-17 15:05:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-17 15:05:07,452 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:07,453 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:05:07,453 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:05:07,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2476, Invalid=5534, Unknown=0, NotChecked=0, Total=8010 [2020-09-17 15:05:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:05:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2020-09-17 15:05:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:05:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-17 15:05:07,456 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 36 [2020-09-17 15:05:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:07,456 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-17 15:05:07,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-17 15:05:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:07,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:07,457 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:07,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 15:05:07,658 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1876764150, now seen corresponding path program 210 times [2020-09-17 15:05:07,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:07,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220532485] [2020-09-17 15:05:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:08,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220532485] [2020-09-17 15:05:08,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859780350] [2020-09-17 15:05:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:08,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:05:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:08,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:08,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:08,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:08,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564143830] [2020-09-17 15:05:08,783 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:08,785 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:08,796 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 57 transitions. [2020-09-17 15:05:08,796 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:08,797 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,797 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,864 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,864 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,918 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,930 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,939 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,940 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,947 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,997 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:09,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:09,010 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:09,021 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93879#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 15:05:09,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:09,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:09,022 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 34 states. [2020-09-17 15:05:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:10,770 INFO L93 Difference]: Finished difference Result 132 states and 308 transitions. [2020-09-17 15:05:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:05:10,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:10,772 INFO L225 Difference]: With dead ends: 132 [2020-09-17 15:05:10,772 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 15:05:10,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1232, Invalid=2928, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:05:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 15:05:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-17 15:05:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:05:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-17 15:05:10,775 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 37 [2020-09-17 15:05:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:10,775 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-17 15:05:10,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-17 15:05:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:10,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:10,775 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:10,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 15:05:10,979 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1233524332, now seen corresponding path program 211 times [2020-09-17 15:05:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:10,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121010538] [2020-09-17 15:05:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:12,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121010538] [2020-09-17 15:05:12,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481604978] [2020-09-17 15:05:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:12,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:12,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:12,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828619446] [2020-09-17 15:05:12,089 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:12,092 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:12,101 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:12,101 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:12,102 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:12,102 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:12,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:12,180 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:12,196 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94403#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 15:05:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:12,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:12,197 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 34 states. [2020-09-17 15:05:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:14,152 INFO L93 Difference]: Finished difference Result 192 states and 430 transitions. [2020-09-17 15:05:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:05:14,154 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:14,155 INFO L225 Difference]: With dead ends: 192 [2020-09-17 15:05:14,155 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 15:05:14,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1301, Invalid=3391, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:05:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 15:05:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 96. [2020-09-17 15:05:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:05:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-17 15:05:14,158 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 37 [2020-09-17 15:05:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:14,158 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-17 15:05:14,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-17 15:05:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:14,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:14,159 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:14,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:14,360 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1911620430, now seen corresponding path program 212 times [2020-09-17 15:05:14,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:14,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388118151] [2020-09-17 15:05:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:15,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388118151] [2020-09-17 15:05:15,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115827296] [2020-09-17 15:05:15,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:15,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:05:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:15,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:15,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:15,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [183867633] [2020-09-17 15:05:15,447 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:15,450 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:15,464 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:15,464 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:15,468 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:15,468 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:15,548 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:15,548 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:15,562 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94999#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:05:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:15,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:15,563 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 34 states. [2020-09-17 15:05:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:17,699 INFO L93 Difference]: Finished difference Result 189 states and 426 transitions. [2020-09-17 15:05:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:05:17,700 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:17,701 INFO L225 Difference]: With dead ends: 189 [2020-09-17 15:05:17,701 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 15:05:17,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1320, Invalid=3650, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:05:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 15:05:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 98. [2020-09-17 15:05:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:05:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 244 transitions. [2020-09-17 15:05:17,703 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 244 transitions. Word has length 37 [2020-09-17 15:05:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:17,703 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 244 transitions. [2020-09-17 15:05:17,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 244 transitions. [2020-09-17 15:05:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:17,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:17,704 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:17,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 15:05:17,905 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1332363088, now seen corresponding path program 213 times [2020-09-17 15:05:17,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:17,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940679406] [2020-09-17 15:05:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:18,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940679406] [2020-09-17 15:05:18,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901922674] [2020-09-17 15:05:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:18,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:05:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:18,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:18,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:18,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55064161] [2020-09-17 15:05:18,954 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:18,959 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:18,972 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:18,972 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:18,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:18,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:19,050 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:19,050 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:19,065 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95600#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:05:19,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:19,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:19,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:19,067 INFO L87 Difference]: Start difference. First operand 98 states and 244 transitions. Second operand 34 states. [2020-09-17 15:05:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:21,226 INFO L93 Difference]: Finished difference Result 187 states and 424 transitions. [2020-09-17 15:05:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:05:21,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:21,229 INFO L225 Difference]: With dead ends: 187 [2020-09-17 15:05:21,229 INFO L226 Difference]: Without dead ends: 181 [2020-09-17 15:05:21,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1355, Invalid=3901, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:05:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-17 15:05:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 100. [2020-09-17 15:05:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:05:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 250 transitions. [2020-09-17 15:05:21,232 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 250 transitions. Word has length 37 [2020-09-17 15:05:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:21,232 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 250 transitions. [2020-09-17 15:05:21,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 250 transitions. [2020-09-17 15:05:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:21,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:21,233 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:21,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:21,433 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash 313421458, now seen corresponding path program 214 times [2020-09-17 15:05:21,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:21,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893744442] [2020-09-17 15:05:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:22,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893744442] [2020-09-17 15:05:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955643273] [2020-09-17 15:05:22,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:22,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:05:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:22,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:22,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:22,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528126860] [2020-09-17 15:05:22,468 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:22,470 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:22,480 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:22,480 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:22,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:22,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:22,554 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:22,555 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:22,570 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96207#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:05:22,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:22,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:22,571 INFO L87 Difference]: Start difference. First operand 100 states and 250 transitions. Second operand 34 states. [2020-09-17 15:05:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:25,001 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2020-09-17 15:05:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:05:25,003 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:25,003 INFO L225 Difference]: With dead ends: 185 [2020-09-17 15:05:25,003 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 15:05:25,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1406, Invalid=4144, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:05:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 15:05:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2020-09-17 15:05:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:05:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 256 transitions. [2020-09-17 15:05:25,006 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 256 transitions. Word has length 37 [2020-09-17 15:05:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:25,006 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 256 transitions. [2020-09-17 15:05:25,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 256 transitions. [2020-09-17 15:05:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:25,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:25,006 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:25,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 15:05:25,207 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash -310563596, now seen corresponding path program 215 times [2020-09-17 15:05:25,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:25,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550443338] [2020-09-17 15:05:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:26,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550443338] [2020-09-17 15:05:26,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197432059] [2020-09-17 15:05:26,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:26,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:05:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:26,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:26,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:26,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250821662] [2020-09-17 15:05:26,216 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:26,218 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:26,228 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:26,228 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:26,229 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:26,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:26,300 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:26,301 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:26,315 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96820#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:05:26,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:26,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:26,316 INFO L87 Difference]: Start difference. First operand 102 states and 256 transitions. Second operand 34 states. [2020-09-17 15:05:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:28,822 INFO L93 Difference]: Finished difference Result 183 states and 420 transitions. [2020-09-17 15:05:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:05:28,824 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:28,825 INFO L225 Difference]: With dead ends: 183 [2020-09-17 15:05:28,825 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 15:05:28,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1473, Invalid=4379, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:05:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 15:05:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2020-09-17 15:05:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:05:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 262 transitions. [2020-09-17 15:05:28,828 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 262 transitions. Word has length 37 [2020-09-17 15:05:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:28,828 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 262 transitions. [2020-09-17 15:05:28,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 262 transitions. [2020-09-17 15:05:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:28,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:28,829 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:29,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:29,038 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1078729686, now seen corresponding path program 216 times [2020-09-17 15:05:29,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:29,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418596292] [2020-09-17 15:05:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418596292] [2020-09-17 15:05:29,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830087108] [2020-09-17 15:05:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:30,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:05:30,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:30,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:30,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:30,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [442025132] [2020-09-17 15:05:30,040 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:30,043 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:30,054 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:30,054 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:30,054 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:30,054 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:30,132 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:30,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:30,186 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [97439#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:05:30,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:30,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:30,187 INFO L87 Difference]: Start difference. First operand 104 states and 262 transitions. Second operand 34 states. [2020-09-17 15:05:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:32,901 INFO L93 Difference]: Finished difference Result 181 states and 418 transitions. [2020-09-17 15:05:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:05:32,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:32,903 INFO L225 Difference]: With dead ends: 181 [2020-09-17 15:05:32,903 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 15:05:32,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1556, Invalid=4606, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:05:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 15:05:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 106. [2020-09-17 15:05:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:05:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 268 transitions. [2020-09-17 15:05:32,906 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 268 transitions. Word has length 37 [2020-09-17 15:05:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:32,906 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 268 transitions. [2020-09-17 15:05:32,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 268 transitions. [2020-09-17 15:05:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:32,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:32,907 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:33,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 15:05:33,108 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1771218120, now seen corresponding path program 217 times [2020-09-17 15:05:33,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:33,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326716135] [2020-09-17 15:05:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:33,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326716135] [2020-09-17 15:05:33,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227213281] [2020-09-17 15:05:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:34,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:34,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:34,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [756924905] [2020-09-17 15:05:34,073 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:34,075 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:34,085 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:34,085 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:34,085 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:34,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:34,161 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:34,161 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:34,217 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98064#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:05:34,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:34,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:34,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:34,218 INFO L87 Difference]: Start difference. First operand 106 states and 268 transitions. Second operand 34 states. [2020-09-17 15:05:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:37,129 INFO L93 Difference]: Finished difference Result 179 states and 416 transitions. [2020-09-17 15:05:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:05:37,131 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:37,131 INFO L225 Difference]: With dead ends: 179 [2020-09-17 15:05:37,131 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 15:05:37,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1655, Invalid=4825, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:05:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 15:05:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 108. [2020-09-17 15:05:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:05:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 274 transitions. [2020-09-17 15:05:37,134 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 274 transitions. Word has length 37 [2020-09-17 15:05:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:37,134 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 274 transitions. [2020-09-17 15:05:37,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 274 transitions. [2020-09-17 15:05:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:37,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:37,135 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:37,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2020-09-17 15:05:37,336 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1765477146, now seen corresponding path program 218 times [2020-09-17 15:05:37,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:37,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583043905] [2020-09-17 15:05:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:38,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583043905] [2020-09-17 15:05:38,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675714418] [2020-09-17 15:05:38,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:38,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:05:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:38,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:38,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:38,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317020169] [2020-09-17 15:05:38,321 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:38,323 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:38,334 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:38,334 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:38,337 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:38,338 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:38,411 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:38,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:38,425 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98695#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:05:38,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:38,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:38,426 INFO L87 Difference]: Start difference. First operand 108 states and 274 transitions. Second operand 34 states. [2020-09-17 15:05:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:41,502 INFO L93 Difference]: Finished difference Result 177 states and 414 transitions. [2020-09-17 15:05:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:05:41,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:41,505 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:05:41,505 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:05:41,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1770, Invalid=5036, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:05:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:05:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2020-09-17 15:05:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:05:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 280 transitions. [2020-09-17 15:05:41,508 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 280 transitions. Word has length 37 [2020-09-17 15:05:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:41,509 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 280 transitions. [2020-09-17 15:05:41,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 280 transitions. [2020-09-17 15:05:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:41,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:41,509 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:41,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:41,710 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash 35081084, now seen corresponding path program 219 times [2020-09-17 15:05:41,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:41,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898368015] [2020-09-17 15:05:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:42,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898368015] [2020-09-17 15:05:42,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060011337] [2020-09-17 15:05:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:05:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:42,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:42,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:42,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155679989] [2020-09-17 15:05:42,670 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:42,680 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:42,690 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:42,690 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:42,693 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:42,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:42,763 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:42,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:42,776 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99332#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:05:42,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:42,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:42,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:42,777 INFO L87 Difference]: Start difference. First operand 110 states and 280 transitions. Second operand 34 states. [2020-09-17 15:05:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:45,986 INFO L93 Difference]: Finished difference Result 175 states and 412 transitions. [2020-09-17 15:05:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:05:45,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:45,989 INFO L225 Difference]: With dead ends: 175 [2020-09-17 15:05:45,989 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 15:05:45,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1901, Invalid=5239, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:05:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 15:05:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2020-09-17 15:05:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:05:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 286 transitions. [2020-09-17 15:05:45,992 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 286 transitions. Word has length 37 [2020-09-17 15:05:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:45,992 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 286 transitions. [2020-09-17 15:05:45,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 286 transitions. [2020-09-17 15:05:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:45,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:45,993 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:46,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2020-09-17 15:05:46,194 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -596886434, now seen corresponding path program 220 times [2020-09-17 15:05:46,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:46,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582267497] [2020-09-17 15:05:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:47,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582267497] [2020-09-17 15:05:47,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730064981] [2020-09-17 15:05:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:47,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:05:47,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:47,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:47,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:47,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1251057930] [2020-09-17 15:05:47,179 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:47,181 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:47,192 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:47,192 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:47,193 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:47,193 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:47,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:47,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:47,282 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99975#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:05:47,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:47,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:47,283 INFO L87 Difference]: Start difference. First operand 112 states and 286 transitions. Second operand 34 states. [2020-09-17 15:05:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:50,736 INFO L93 Difference]: Finished difference Result 173 states and 410 transitions. [2020-09-17 15:05:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:05:50,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:50,738 INFO L225 Difference]: With dead ends: 173 [2020-09-17 15:05:50,738 INFO L226 Difference]: Without dead ends: 167 [2020-09-17 15:05:50,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2048, Invalid=5434, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:05:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-17 15:05:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-09-17 15:05:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:05:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 292 transitions. [2020-09-17 15:05:50,741 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 292 transitions. Word has length 37 [2020-09-17 15:05:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:50,741 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 292 transitions. [2020-09-17 15:05:50,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 292 transitions. [2020-09-17 15:05:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:50,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:50,742 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:50,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 15:05:50,943 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2018771520, now seen corresponding path program 221 times [2020-09-17 15:05:50,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:50,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139352254] [2020-09-17 15:05:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:51,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139352254] [2020-09-17 15:05:51,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960921481] [2020-09-17 15:05:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:51,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:05:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:51,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:51,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:51,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1840104725] [2020-09-17 15:05:51,937 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:51,939 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:51,949 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:51,950 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:51,950 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:51,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:52,025 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:52,025 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:52,041 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [100624#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:05:52,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:52,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:52,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:52,042 INFO L87 Difference]: Start difference. First operand 114 states and 292 transitions. Second operand 34 states. [2020-09-17 15:05:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:55,562 INFO L93 Difference]: Finished difference Result 171 states and 408 transitions. [2020-09-17 15:05:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:05:55,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:05:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:55,564 INFO L225 Difference]: With dead ends: 171 [2020-09-17 15:05:55,564 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 15:05:55,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2211, Invalid=5621, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:05:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 15:05:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2020-09-17 15:05:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 15:05:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 298 transitions. [2020-09-17 15:05:55,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 298 transitions. Word has length 37 [2020-09-17 15:05:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:55,567 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 298 transitions. [2020-09-17 15:05:55,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:05:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 298 transitions. [2020-09-17 15:05:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:05:55,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:55,567 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:55,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:55,768 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 156282786, now seen corresponding path program 222 times [2020-09-17 15:05:55,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:55,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708898804] [2020-09-17 15:05:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708898804] [2020-09-17 15:05:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631777469] [2020-09-17 15:05:56,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:56,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:05:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:05:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:56,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:56,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:05:56,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [124179106] [2020-09-17 15:05:56,768 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:56,771 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:56,783 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:05:56,783 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:56,784 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:56,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:56,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:56,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:56,904 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101279#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:05:56,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:05:56,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:56,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:05:56,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:05:56,905 INFO L87 Difference]: Start difference. First operand 116 states and 298 transitions. Second operand 34 states. [2020-09-17 15:06:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:00,643 INFO L93 Difference]: Finished difference Result 169 states and 406 transitions. [2020-09-17 15:06:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:06:00,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:00,645 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:06:00,645 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:06:00,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2390, Invalid=5800, Unknown=0, NotChecked=0, Total=8190 [2020-09-17 15:06:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:06:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-17 15:06:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 15:06:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 304 transitions. [2020-09-17 15:06:00,650 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 304 transitions. Word has length 37 [2020-09-17 15:06:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:00,650 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 304 transitions. [2020-09-17 15:06:00,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 304 transitions. [2020-09-17 15:06:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:00,651 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:00,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 15:06:00,862 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1092849148, now seen corresponding path program 223 times [2020-09-17 15:06:00,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:00,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898409851] [2020-09-17 15:06:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898409851] [2020-09-17 15:06:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511804738] [2020-09-17 15:06:01,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:01,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:01,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:01,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243752557] [2020-09-17 15:06:01,883 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:01,886 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:01,898 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:01,898 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:01,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:01,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:01,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:01,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:01,996 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101940#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:06:01,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:01,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:01,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:01,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:01,997 INFO L87 Difference]: Start difference. First operand 118 states and 304 transitions. Second operand 34 states. [2020-09-17 15:06:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:05,961 INFO L93 Difference]: Finished difference Result 169 states and 409 transitions. [2020-09-17 15:06:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-17 15:06:05,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:05,963 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:06:05,963 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:06:05,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2585, Invalid=5971, Unknown=0, NotChecked=0, Total=8556 [2020-09-17 15:06:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:06:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2020-09-17 15:06:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 15:06:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2020-09-17 15:06:05,967 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 37 [2020-09-17 15:06:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:05,967 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2020-09-17 15:06:05,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2020-09-17 15:06:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:05,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:05,968 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:06,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-17 15:06:06,172 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1076271898, now seen corresponding path program 224 times [2020-09-17 15:06:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322284625] [2020-09-17 15:06:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:07,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322284625] [2020-09-17 15:06:07,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692071832] [2020-09-17 15:06:07,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:07,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:06:07,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:07,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:07,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:07,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:07,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198029186] [2020-09-17 15:06:07,190 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:07,192 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:07,203 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:07,203 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:07,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:07,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:07,280 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:07,280 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:07,294 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [102609#(and (<= ~j~0 32) (< ~i~0 46))] [2020-09-17 15:06:07,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:07,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:07,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:07,295 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand 34 states. [2020-09-17 15:06:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:11,351 INFO L93 Difference]: Finished difference Result 170 states and 419 transitions. [2020-09-17 15:06:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-17 15:06:11,353 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:11,353 INFO L225 Difference]: With dead ends: 170 [2020-09-17 15:06:11,354 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 15:06:11,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2794, Invalid=6136, Unknown=0, NotChecked=0, Total=8930 [2020-09-17 15:06:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 15:06:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-17 15:06:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:06:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-09-17 15:06:11,357 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2020-09-17 15:06:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:11,357 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-09-17 15:06:11,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-09-17 15:06:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:11,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:11,358 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:11,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 15:06:11,562 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash 286110261, now seen corresponding path program 225 times [2020-09-17 15:06:11,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:11,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692218345] [2020-09-17 15:06:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:12,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692218345] [2020-09-17 15:06:12,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289519601] [2020-09-17 15:06:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:12,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:06:12,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:12,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:12,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:12,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [588488798] [2020-09-17 15:06:12,842 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:12,844 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:12,855 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 54 transitions. [2020-09-17 15:06:12,855 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:12,860 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:12,860 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:12,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:12,945 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:12,960 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103227#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:06:12,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:12,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:12,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:12,961 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 35 states. [2020-09-17 15:06:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:14,905 INFO L93 Difference]: Finished difference Result 166 states and 378 transitions. [2020-09-17 15:06:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:06:14,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:14,908 INFO L225 Difference]: With dead ends: 166 [2020-09-17 15:06:14,908 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 15:06:14,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:06:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 15:06:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2020-09-17 15:06:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:06:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 240 transitions. [2020-09-17 15:06:14,911 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 240 transitions. Word has length 38 [2020-09-17 15:06:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:14,911 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 240 transitions. [2020-09-17 15:06:14,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 240 transitions. [2020-09-17 15:06:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:14,912 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:15,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:15,117 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash -898568553, now seen corresponding path program 226 times [2020-09-17 15:06:15,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:15,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549913561] [2020-09-17 15:06:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:16,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549913561] [2020-09-17 15:06:16,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638276218] [2020-09-17 15:06:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:16,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:06:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:16,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:16,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:16,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [361107778] [2020-09-17 15:06:16,411 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:16,413 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:16,424 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:16,424 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:16,426 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:16,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:16,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:16,508 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:16,525 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103799#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:06:16,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:16,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:16,525 INFO L87 Difference]: Start difference. First operand 97 states and 240 transitions. Second operand 35 states. [2020-09-17 15:06:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:18,660 INFO L93 Difference]: Finished difference Result 163 states and 374 transitions. [2020-09-17 15:06:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:06:18,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:18,663 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:06:18,663 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:06:18,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1311, Invalid=3519, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:06:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:06:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 99. [2020-09-17 15:06:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:06:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 246 transitions. [2020-09-17 15:06:18,666 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 246 transitions. Word has length 38 [2020-09-17 15:06:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:18,666 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 246 transitions. [2020-09-17 15:06:18,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 246 transitions. [2020-09-17 15:06:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:18,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:18,667 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:18,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 15:06:18,869 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash -220472455, now seen corresponding path program 227 times [2020-09-17 15:06:18,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:18,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280789419] [2020-09-17 15:06:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280789419] [2020-09-17 15:06:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556886395] [2020-09-17 15:06:20,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:20,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:06:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:20,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:20,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:20,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984329078] [2020-09-17 15:06:20,112 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:20,115 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:20,143 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:20,143 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:20,145 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:20,145 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:20,228 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:20,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:20,244 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104376#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:06:20,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:20,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:20,245 INFO L87 Difference]: Start difference. First operand 99 states and 246 transitions. Second operand 35 states. [2020-09-17 15:06:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:22,566 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-17 15:06:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:06:22,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:22,568 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:06:22,569 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:06:22,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:06:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:06:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2020-09-17 15:06:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:06:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 252 transitions. [2020-09-17 15:06:22,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 252 transitions. Word has length 38 [2020-09-17 15:06:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:22,572 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 252 transitions. [2020-09-17 15:06:22,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 252 transitions. [2020-09-17 15:06:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:22,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:22,572 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:22,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-17 15:06:22,773 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash 830511323, now seen corresponding path program 228 times [2020-09-17 15:06:22,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:22,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672927379] [2020-09-17 15:06:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:23,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672927379] [2020-09-17 15:06:23,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980618792] [2020-09-17 15:06:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:23,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:06:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:23,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:23,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:23,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875484227] [2020-09-17 15:06:23,933 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:23,936 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:23,970 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:23,970 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:23,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:23,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:24,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:24,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:24,076 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104959#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:06:24,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:24,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:24,077 INFO L87 Difference]: Start difference. First operand 101 states and 252 transitions. Second operand 35 states. [2020-09-17 15:06:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:26,675 INFO L93 Difference]: Finished difference Result 159 states and 370 transitions. [2020-09-17 15:06:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:06:26,677 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:26,678 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:06:26,678 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:06:26,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1367, Invalid=4035, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:06:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:06:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 103. [2020-09-17 15:06:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:06:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 258 transitions. [2020-09-17 15:06:26,682 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 258 transitions. Word has length 38 [2020-09-17 15:06:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:26,682 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 258 transitions. [2020-09-17 15:06:26,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 258 transitions. [2020-09-17 15:06:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:26,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:26,682 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:26,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:26,883 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1818671427, now seen corresponding path program 229 times [2020-09-17 15:06:26,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:26,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986338305] [2020-09-17 15:06:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:27,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986338305] [2020-09-17 15:06:27,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53499967] [2020-09-17 15:06:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:27,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:28,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:28,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:28,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1545032078] [2020-09-17 15:06:28,013 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:28,015 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:28,026 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:28,026 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:28,029 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:28,029 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:28,136 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:28,136 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:28,153 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [105548#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:06:28,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:28,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:28,153 INFO L87 Difference]: Start difference. First operand 103 states and 258 transitions. Second operand 35 states. [2020-09-17 15:06:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:30,946 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-17 15:06:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:06:30,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:30,949 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:06:30,949 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:06:30,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1419, Invalid=4281, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:06:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:06:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2020-09-17 15:06:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:06:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 264 transitions. [2020-09-17 15:06:30,952 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 264 transitions. Word has length 38 [2020-09-17 15:06:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:30,952 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 264 transitions. [2020-09-17 15:06:30,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 264 transitions. [2020-09-17 15:06:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:30,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:30,953 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:31,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:31,154 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1852310815, now seen corresponding path program 230 times [2020-09-17 15:06:31,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:31,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865778377] [2020-09-17 15:06:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:32,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865778377] [2020-09-17 15:06:32,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955744243] [2020-09-17 15:06:32,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:32,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:06:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:32,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:32,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:32,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [116379138] [2020-09-17 15:06:32,286 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:32,289 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:32,331 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:32,331 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:32,332 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:32,332 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:32,415 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:32,415 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:32,476 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106143#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:06:32,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:32,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:32,478 INFO L87 Difference]: Start difference. First operand 105 states and 264 transitions. Second operand 35 states. [2020-09-17 15:06:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:35,421 INFO L93 Difference]: Finished difference Result 155 states and 366 transitions. [2020-09-17 15:06:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:06:35,422 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:35,423 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:06:35,423 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:06:35,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1487, Invalid=4519, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:06:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:06:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 107. [2020-09-17 15:06:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:06:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 270 transitions. [2020-09-17 15:06:35,427 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 270 transitions. Word has length 38 [2020-09-17 15:06:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:35,427 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 270 transitions. [2020-09-17 15:06:35,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 270 transitions. [2020-09-17 15:06:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:35,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:35,428 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:35,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:35,632 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1053363199, now seen corresponding path program 231 times [2020-09-17 15:06:35,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:35,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027359773] [2020-09-17 15:06:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:36,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027359773] [2020-09-17 15:06:36,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438640783] [2020-09-17 15:06:36,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:36,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:06:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:36,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:36,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:36,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:36,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:36,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117219059] [2020-09-17 15:06:36,777 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:36,810 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:36,821 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:36,821 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:36,823 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:36,824 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:36,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:36,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:36,926 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106744#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:06:36,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:36,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:36,927 INFO L87 Difference]: Start difference. First operand 107 states and 270 transitions. Second operand 35 states. [2020-09-17 15:06:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:40,010 INFO L93 Difference]: Finished difference Result 153 states and 364 transitions. [2020-09-17 15:06:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:06:40,011 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:40,012 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:06:40,012 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:06:40,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:06:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:06:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2020-09-17 15:06:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:06:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 276 transitions. [2020-09-17 15:06:40,015 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 276 transitions. Word has length 38 [2020-09-17 15:06:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:40,015 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 276 transitions. [2020-09-17 15:06:40,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 276 transitions. [2020-09-17 15:06:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:40,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:40,016 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:40,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 15:06:40,217 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 391656291, now seen corresponding path program 232 times [2020-09-17 15:06:40,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:40,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508427975] [2020-09-17 15:06:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:41,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508427975] [2020-09-17 15:06:41,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035762338] [2020-09-17 15:06:41,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:41,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:06:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:41,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:41,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:41,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549811464] [2020-09-17 15:06:41,342 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:41,345 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:41,357 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:41,357 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:41,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:41,360 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:41,444 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:41,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:41,461 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107351#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:06:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:41,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:41,462 INFO L87 Difference]: Start difference. First operand 109 states and 276 transitions. Second operand 35 states. [2020-09-17 15:06:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:44,774 INFO L93 Difference]: Finished difference Result 151 states and 362 transitions. [2020-09-17 15:06:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:06:44,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:44,776 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:06:44,777 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:06:44,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1671, Invalid=4971, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:06:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:06:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2020-09-17 15:06:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:06:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 282 transitions. [2020-09-17 15:06:44,780 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 282 transitions. Word has length 38 [2020-09-17 15:06:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:44,780 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 282 transitions. [2020-09-17 15:06:44,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 282 transitions. [2020-09-17 15:06:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:44,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:44,780 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:44,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-17 15:06:44,981 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash -366615739, now seen corresponding path program 233 times [2020-09-17 15:06:44,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:44,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856736987] [2020-09-17 15:06:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:45,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856736987] [2020-09-17 15:06:45,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408394691] [2020-09-17 15:06:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:46,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:06:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:46,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:46,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:46,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [727893432] [2020-09-17 15:06:46,121 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:46,123 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:46,136 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:46,136 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:46,139 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:46,139 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:46,229 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:46,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:46,248 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107964#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:06:46,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:46,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:46,249 INFO L87 Difference]: Start difference. First operand 111 states and 282 transitions. Second operand 35 states. [2020-09-17 15:06:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:49,744 INFO L93 Difference]: Finished difference Result 149 states and 360 transitions. [2020-09-17 15:06:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:06:49,746 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:49,747 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:06:49,747 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:06:49,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1787, Invalid=5185, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:06:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:06:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-09-17 15:06:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 15:06:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2020-09-17 15:06:49,750 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 38 [2020-09-17 15:06:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:49,750 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2020-09-17 15:06:49,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2020-09-17 15:06:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:49,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:49,751 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:49,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 15:06:49,952 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2097011801, now seen corresponding path program 234 times [2020-09-17 15:06:49,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:49,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753361450] [2020-09-17 15:06:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:50,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753361450] [2020-09-17 15:06:50,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628697543] [2020-09-17 15:06:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:51,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:06:51,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:51,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:51,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:51,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2082386075] [2020-09-17 15:06:51,064 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:51,066 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:51,077 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:51,078 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:51,078 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:51,078 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:51,160 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:51,160 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:51,179 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [108583#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:06:51,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:51,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:51,180 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand 35 states. [2020-09-17 15:06:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:54,884 INFO L93 Difference]: Finished difference Result 147 states and 358 transitions. [2020-09-17 15:06:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:06:54,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:06:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:54,887 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:06:54,887 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:06:54,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1919, Invalid=5391, Unknown=0, NotChecked=0, Total=7310 [2020-09-17 15:06:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:06:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2020-09-17 15:06:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 15:06:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 294 transitions. [2020-09-17 15:06:54,890 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 294 transitions. Word has length 38 [2020-09-17 15:06:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:54,890 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 294 transitions. [2020-09-17 15:06:54,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:06:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 294 transitions. [2020-09-17 15:06:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:06:54,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:54,890 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:55,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 15:06:55,091 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987977, now seen corresponding path program 235 times [2020-09-17 15:06:55,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:55,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4574091] [2020-09-17 15:06:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:56,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4574091] [2020-09-17 15:06:56,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127988979] [2020-09-17 15:06:56,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:56,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:06:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:56,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:56,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:06:56,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1626644308] [2020-09-17 15:06:56,195 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:56,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:56,210 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:06:56,210 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:56,212 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:56,212 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:56,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:56,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:56,324 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109208#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:06:56,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:06:56,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:56,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:06:56,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:06:56,325 INFO L87 Difference]: Start difference. First operand 115 states and 294 transitions. Second operand 35 states. [2020-09-17 15:07:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:00,267 INFO L93 Difference]: Finished difference Result 145 states and 356 transitions. [2020-09-17 15:07:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:07:00,269 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:00,269 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:07:00,269 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:07:00,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2067, Invalid=5589, Unknown=0, NotChecked=0, Total=7656 [2020-09-17 15:07:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:07:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2020-09-17 15:07:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 15:07:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 300 transitions. [2020-09-17 15:07:00,273 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 300 transitions. Word has length 38 [2020-09-17 15:07:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:00,273 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 300 transitions. [2020-09-17 15:07:00,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 300 transitions. [2020-09-17 15:07:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:00,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:00,274 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:00,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 15:07:00,483 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash 144102891, now seen corresponding path program 236 times [2020-09-17 15:07:00,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:00,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393324944] [2020-09-17 15:07:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:01,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393324944] [2020-09-17 15:07:01,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869087917] [2020-09-17 15:07:01,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:01,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:07:01,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:01,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:01,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:01,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:01,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:01,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1823275534] [2020-09-17 15:07:01,578 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:01,580 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:01,592 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:01,592 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:01,594 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:01,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:01,676 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:01,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:01,694 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109839#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:07:01,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:01,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:01,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:01,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:01,695 INFO L87 Difference]: Start difference. First operand 117 states and 300 transitions. Second operand 35 states. [2020-09-17 15:07:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:05,889 INFO L93 Difference]: Finished difference Result 143 states and 354 transitions. [2020-09-17 15:07:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:07:05,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:05,892 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:07:05,893 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:07:05,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2231, Invalid=5779, Unknown=0, NotChecked=0, Total=8010 [2020-09-17 15:07:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:07:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2020-09-17 15:07:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 15:07:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 306 transitions. [2020-09-17 15:07:05,895 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 306 transitions. Word has length 38 [2020-09-17 15:07:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:05,896 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 306 transitions. [2020-09-17 15:07:05,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 306 transitions. [2020-09-17 15:07:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:05,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:05,896 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:06,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:06,097 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1975810099, now seen corresponding path program 237 times [2020-09-17 15:07:06,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:06,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818114760] [2020-09-17 15:07:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:07,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818114760] [2020-09-17 15:07:07,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197736492] [2020-09-17 15:07:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:07,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:07:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:07,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:07,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:07,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:07,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404607131] [2020-09-17 15:07:07,232 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:07,234 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:07,246 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:07,246 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:07,248 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:07,248 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:07,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:07,329 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:07,348 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [110476#(and (<= ~j~0 32) (< ~i~0 46))] [2020-09-17 15:07:07,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:07,349 INFO L87 Difference]: Start difference. First operand 119 states and 306 transitions. Second operand 35 states. [2020-09-17 15:07:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:11,642 INFO L93 Difference]: Finished difference Result 141 states and 352 transitions. [2020-09-17 15:07:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:07:11,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:11,645 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:07:11,645 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:07:11,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2411, Invalid=5961, Unknown=0, NotChecked=0, Total=8372 [2020-09-17 15:07:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:07:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2020-09-17 15:07:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 15:07:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 312 transitions. [2020-09-17 15:07:11,648 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 312 transitions. Word has length 38 [2020-09-17 15:07:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:11,648 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 312 transitions. [2020-09-17 15:07:11,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 312 transitions. [2020-09-17 15:07:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:11,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:11,649 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:11,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 15:07:11,850 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1070025263, now seen corresponding path program 238 times [2020-09-17 15:07:11,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:11,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583723970] [2020-09-17 15:07:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:12,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583723970] [2020-09-17 15:07:12,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039897592] [2020-09-17 15:07:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:12,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:07:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:12,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:12,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:12,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [77094949] [2020-09-17 15:07:12,955 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:12,957 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:12,969 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:12,970 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:12,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:12,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:13,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:13,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:13,076 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111119#(and (<= ~j~0 34) (< ~i~0 46))] [2020-09-17 15:07:13,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:13,077 INFO L87 Difference]: Start difference. First operand 121 states and 312 transitions. Second operand 35 states. [2020-09-17 15:07:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:17,541 INFO L93 Difference]: Finished difference Result 141 states and 355 transitions. [2020-09-17 15:07:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-17 15:07:17,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:17,543 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:07:17,543 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:07:17,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2607, Invalid=6135, Unknown=0, NotChecked=0, Total=8742 [2020-09-17 15:07:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:07:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-09-17 15:07:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-17 15:07:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 320 transitions. [2020-09-17 15:07:17,546 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 320 transitions. Word has length 38 [2020-09-17 15:07:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:17,546 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 320 transitions. [2020-09-17 15:07:17,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 320 transitions. [2020-09-17 15:07:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:17,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:17,547 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:17,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:17,748 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1086602513, now seen corresponding path program 239 times [2020-09-17 15:07:17,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:17,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301418261] [2020-09-17 15:07:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:18,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301418261] [2020-09-17 15:07:18,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753017115] [2020-09-17 15:07:18,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:18,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:07:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:18,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:18,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:18,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1908857871] [2020-09-17 15:07:18,853 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:18,856 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:18,868 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:18,868 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:18,869 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:18,869 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:18,955 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:18,956 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:18,977 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111770#(and (<= ~j~0 36) (< ~i~0 46))] [2020-09-17 15:07:18,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:18,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:18,978 INFO L87 Difference]: Start difference. First operand 123 states and 320 transitions. Second operand 35 states. [2020-09-17 15:07:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:23,585 INFO L93 Difference]: Finished difference Result 141 states and 363 transitions. [2020-09-17 15:07:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-17 15:07:23,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:23,587 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:07:23,587 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:07:23,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2817, Invalid=6303, Unknown=0, NotChecked=0, Total=9120 [2020-09-17 15:07:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:07:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2020-09-17 15:07:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:07:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-17 15:07:23,590 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 38 [2020-09-17 15:07:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:23,591 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-17 15:07:23,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-17 15:07:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:23,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:23,591 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:23,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:23,792 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 315932105, now seen corresponding path program 240 times [2020-09-17 15:07:23,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:23,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256553310] [2020-09-17 15:07:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256553310] [2020-09-17 15:07:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795294193] [2020-09-17 15:07:25,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:25,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:07:25,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:25,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:25,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:25,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1896552865] [2020-09-17 15:07:25,214 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:25,217 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:25,262 INFO L274 McrAutomatonBuilder]: Finished intersection with 49 states and 59 transitions. [2020-09-17 15:07:25,263 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:25,263 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,345 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,423 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,445 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,506 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,507 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,516 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:25,516 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:25,532 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112363#(and (<= ~j~0 4) (< ~i~0 46))] [2020-09-17 15:07:25,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:25,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:25,533 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 36 states. [2020-09-17 15:07:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:27,891 INFO L93 Difference]: Finished difference Result 138 states and 322 transitions. [2020-09-17 15:07:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:07:27,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:27,894 INFO L225 Difference]: With dead ends: 138 [2020-09-17 15:07:27,894 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 15:07:27,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1393, Invalid=3299, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:07:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 15:07:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2020-09-17 15:07:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:07:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2020-09-17 15:07:27,897 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 39 [2020-09-17 15:07:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:27,897 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2020-09-17 15:07:27,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2020-09-17 15:07:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:27,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:27,898 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:28,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:28,098 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash 5925291, now seen corresponding path program 241 times [2020-09-17 15:07:28,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:28,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960907776] [2020-09-17 15:07:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:29,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960907776] [2020-09-17 15:07:29,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048326757] [2020-09-17 15:07:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:29,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:29,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:29,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [748611698] [2020-09-17 15:07:29,498 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:29,501 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:29,512 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:29,512 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:29,512 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:29,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:29,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:29,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:29,620 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112913#(and (<= ~j~0 6) (< ~i~0 46))] [2020-09-17 15:07:29,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:29,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:29,621 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand 36 states. [2020-09-17 15:07:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:32,180 INFO L93 Difference]: Finished difference Result 202 states and 452 transitions. [2020-09-17 15:07:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:07:32,182 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:32,182 INFO L225 Difference]: With dead ends: 202 [2020-09-17 15:07:32,183 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 15:07:32,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1464, Invalid=3792, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:07:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 15:07:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 100. [2020-09-17 15:07:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:07:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 248 transitions. [2020-09-17 15:07:32,185 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 248 transitions. Word has length 39 [2020-09-17 15:07:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:32,185 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 248 transitions. [2020-09-17 15:07:32,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 248 transitions. [2020-09-17 15:07:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:32,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:32,186 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:32,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:32,387 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1178753523, now seen corresponding path program 242 times [2020-09-17 15:07:32,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:32,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921645491] [2020-09-17 15:07:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:33,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921645491] [2020-09-17 15:07:33,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56126523] [2020-09-17 15:07:33,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:33,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:07:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:33,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:33,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:33,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [430959420] [2020-09-17 15:07:33,761 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:33,764 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:33,775 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:33,775 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:33,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:33,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:33,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:33,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:33,884 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [113539#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:07:33,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:33,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:33,884 INFO L87 Difference]: Start difference. First operand 100 states and 248 transitions. Second operand 36 states. [2020-09-17 15:07:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:36,526 INFO L93 Difference]: Finished difference Result 199 states and 448 transitions. [2020-09-17 15:07:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:07:36,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:36,529 INFO L225 Difference]: With dead ends: 199 [2020-09-17 15:07:36,529 INFO L226 Difference]: Without dead ends: 193 [2020-09-17 15:07:36,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1481, Invalid=4069, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:07:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-17 15:07:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 102. [2020-09-17 15:07:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:07:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 254 transitions. [2020-09-17 15:07:36,532 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 254 transitions. Word has length 39 [2020-09-17 15:07:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:36,532 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 254 transitions. [2020-09-17 15:07:36,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 254 transitions. [2020-09-17 15:07:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:36,533 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:36,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-17 15:07:36,733 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash -500657425, now seen corresponding path program 243 times [2020-09-17 15:07:36,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:36,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807932461] [2020-09-17 15:07:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:37,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807932461] [2020-09-17 15:07:37,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24427387] [2020-09-17 15:07:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:38,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:07:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:38,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:38,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:38,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1005821261] [2020-09-17 15:07:38,101 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:38,104 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:38,115 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:38,115 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:38,118 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:38,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:38,212 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:38,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:38,229 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114170#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:07:38,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:38,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:38,230 INFO L87 Difference]: Start difference. First operand 102 states and 254 transitions. Second operand 36 states. [2020-09-17 15:07:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:40,998 INFO L93 Difference]: Finished difference Result 197 states and 446 transitions. [2020-09-17 15:07:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:07:41,000 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:41,001 INFO L225 Difference]: With dead ends: 197 [2020-09-17 15:07:41,001 INFO L226 Difference]: Without dead ends: 191 [2020-09-17 15:07:41,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:07:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-17 15:07:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2020-09-17 15:07:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:07:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2020-09-17 15:07:41,004 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 39 [2020-09-17 15:07:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:41,004 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2020-09-17 15:07:41,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2020-09-17 15:07:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:41,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:41,005 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:41,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 15:07:41,206 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 550326353, now seen corresponding path program 244 times [2020-09-17 15:07:41,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:41,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331238614] [2020-09-17 15:07:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:42,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331238614] [2020-09-17 15:07:42,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753560403] [2020-09-17 15:07:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:42,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:07:42,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:42,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:42,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:42,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1014922410] [2020-09-17 15:07:42,543 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:42,545 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:42,556 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:42,556 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:42,560 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:42,560 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:42,651 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:42,651 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:42,666 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114807#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:07:42,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:42,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:42,668 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand 36 states. [2020-09-17 15:07:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:45,602 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2020-09-17 15:07:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:07:45,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:45,605 INFO L225 Difference]: With dead ends: 195 [2020-09-17 15:07:45,605 INFO L226 Difference]: Without dead ends: 189 [2020-09-17 15:07:45,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1563, Invalid=4599, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:07:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-17 15:07:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2020-09-17 15:07:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:07:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 266 transitions. [2020-09-17 15:07:45,608 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 266 transitions. Word has length 39 [2020-09-17 15:07:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:45,608 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 266 transitions. [2020-09-17 15:07:45,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 266 transitions. [2020-09-17 15:07:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:45,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:45,609 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:45,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 15:07:45,809 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2098856397, now seen corresponding path program 245 times [2020-09-17 15:07:45,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:45,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473020434] [2020-09-17 15:07:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:46,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473020434] [2020-09-17 15:07:46,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736339220] [2020-09-17 15:07:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:47,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:07:47,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:47,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:47,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:47,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1009780904] [2020-09-17 15:07:47,097 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:47,099 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:47,110 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:47,110 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:47,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:47,114 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:47,201 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:47,201 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:47,217 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [115450#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:07:47,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:47,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:47,218 INFO L87 Difference]: Start difference. First operand 106 states and 266 transitions. Second operand 36 states. [2020-09-17 15:07:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:50,387 INFO L93 Difference]: Finished difference Result 193 states and 442 transitions. [2020-09-17 15:07:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:07:50,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:50,389 INFO L225 Difference]: With dead ends: 193 [2020-09-17 15:07:50,390 INFO L226 Difference]: Without dead ends: 187 [2020-09-17 15:07:50,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1628, Invalid=4852, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:07:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-17 15:07:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2020-09-17 15:07:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:07:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 272 transitions. [2020-09-17 15:07:50,393 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 272 transitions. Word has length 39 [2020-09-17 15:07:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:50,393 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 272 transitions. [2020-09-17 15:07:50,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 272 transitions. [2020-09-17 15:07:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:50,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:50,394 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:50,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 15:07:50,594 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1572125845, now seen corresponding path program 246 times [2020-09-17 15:07:50,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:50,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831390771] [2020-09-17 15:07:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:51,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831390771] [2020-09-17 15:07:51,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979804550] [2020-09-17 15:07:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:51,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:07:51,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:51,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:51,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:51,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1467917518] [2020-09-17 15:07:51,870 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:51,873 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:51,884 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:51,884 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:51,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:51,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:51,979 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:51,979 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:52,044 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116099#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:07:52,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:52,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:52,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:52,045 INFO L87 Difference]: Start difference. First operand 108 states and 272 transitions. Second operand 36 states. [2020-09-17 15:07:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:55,547 INFO L93 Difference]: Finished difference Result 191 states and 440 transitions. [2020-09-17 15:07:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:07:55,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:07:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:55,549 INFO L225 Difference]: With dead ends: 191 [2020-09-17 15:07:55,549 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 15:07:55,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1709, Invalid=5097, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:07:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 15:07:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2020-09-17 15:07:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:07:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 278 transitions. [2020-09-17 15:07:55,552 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 278 transitions. Word has length 39 [2020-09-17 15:07:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:55,553 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 278 transitions. [2020-09-17 15:07:55,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:07:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 278 transitions. [2020-09-17 15:07:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:07:55,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:55,553 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:55,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:55,759 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1333548169, now seen corresponding path program 247 times [2020-09-17 15:07:55,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:55,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990733676] [2020-09-17 15:07:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:56,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990733676] [2020-09-17 15:07:56,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559542582] [2020-09-17 15:07:56,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:07:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:57,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:57,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:07:57,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [618813921] [2020-09-17 15:07:57,076 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:57,079 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:57,091 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:07:57,092 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:57,096 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:57,096 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:57,185 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:57,185 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:57,202 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116754#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:07:57,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:07:57,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:07:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:07:57,203 INFO L87 Difference]: Start difference. First operand 110 states and 278 transitions. Second operand 36 states. [2020-09-17 15:08:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:00,902 INFO L93 Difference]: Finished difference Result 189 states and 438 transitions. [2020-09-17 15:08:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:08:00,904 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:00,905 INFO L225 Difference]: With dead ends: 189 [2020-09-17 15:08:00,905 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 15:08:00,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1806, Invalid=5334, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:08:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 15:08:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 112. [2020-09-17 15:08:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:08:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-09-17 15:08:00,908 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 39 [2020-09-17 15:08:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:00,909 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-09-17 15:08:00,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-09-17 15:08:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:00,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:00,909 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:01,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 15:08:01,118 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash 111471321, now seen corresponding path program 248 times [2020-09-17 15:08:01,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:01,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807031064] [2020-09-17 15:08:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:02,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807031064] [2020-09-17 15:08:02,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49320437] [2020-09-17 15:08:02,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:02,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:08:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:02,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:02,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:02,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:02,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:02,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [585251272] [2020-09-17 15:08:02,400 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:02,402 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:02,414 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:02,414 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:02,418 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:02,418 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:02,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:02,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:02,527 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [117415#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:08:02,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:02,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:02,529 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 36 states. [2020-09-17 15:08:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:06,491 INFO L93 Difference]: Finished difference Result 187 states and 436 transitions. [2020-09-17 15:08:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:08:06,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:06,493 INFO L225 Difference]: With dead ends: 187 [2020-09-17 15:08:06,494 INFO L226 Difference]: Without dead ends: 181 [2020-09-17 15:08:06,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1919, Invalid=5563, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:08:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-17 15:08:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 114. [2020-09-17 15:08:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:08:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 290 transitions. [2020-09-17 15:08:06,497 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 290 transitions. Word has length 39 [2020-09-17 15:08:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:06,497 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 290 transitions. [2020-09-17 15:08:06,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 290 transitions. [2020-09-17 15:08:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:06,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:06,497 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:06,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:06,698 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash -646800709, now seen corresponding path program 249 times [2020-09-17 15:08:06,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:06,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689163299] [2020-09-17 15:08:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:07,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689163299] [2020-09-17 15:08:07,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645734728] [2020-09-17 15:08:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:07,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:08:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:08,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:08,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:08,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1866243970] [2020-09-17 15:08:08,015 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:08,018 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:08,030 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:08,030 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:08,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:08,034 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:08,126 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:08,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:08,143 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118082#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:08:08,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:08,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:08,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:08,144 INFO L87 Difference]: Start difference. First operand 114 states and 290 transitions. Second operand 36 states. [2020-09-17 15:08:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:12,402 INFO L93 Difference]: Finished difference Result 185 states and 434 transitions. [2020-09-17 15:08:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:08:12,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:12,406 INFO L225 Difference]: With dead ends: 185 [2020-09-17 15:08:12,406 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 15:08:12,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2048, Invalid=5784, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:08:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 15:08:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 116. [2020-09-17 15:08:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 15:08:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 296 transitions. [2020-09-17 15:08:12,410 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 296 transitions. Word has length 39 [2020-09-17 15:08:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:12,410 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 296 transitions. [2020-09-17 15:08:12,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 296 transitions. [2020-09-17 15:08:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:12,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:12,410 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:12,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:12,611 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1917770525, now seen corresponding path program 250 times [2020-09-17 15:08:12,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:12,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423472338] [2020-09-17 15:08:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:13,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423472338] [2020-09-17 15:08:13,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716465313] [2020-09-17 15:08:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:13,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:08:13,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:13,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:13,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:13,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069085786] [2020-09-17 15:08:13,876 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:13,879 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:13,890 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:13,891 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:13,894 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:13,895 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:13,989 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:13,989 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:14,006 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118755#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:08:14,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:14,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:14,007 INFO L87 Difference]: Start difference. First operand 116 states and 296 transitions. Second operand 36 states. [2020-09-17 15:08:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:18,341 INFO L93 Difference]: Finished difference Result 183 states and 432 transitions. [2020-09-17 15:08:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:08:18,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:18,344 INFO L225 Difference]: With dead ends: 183 [2020-09-17 15:08:18,344 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 15:08:18,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2193, Invalid=5997, Unknown=0, NotChecked=0, Total=8190 [2020-09-17 15:08:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 15:08:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 118. [2020-09-17 15:08:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 15:08:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 302 transitions. [2020-09-17 15:08:18,347 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 302 transitions. Word has length 39 [2020-09-17 15:08:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:18,348 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 302 transitions. [2020-09-17 15:08:18,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 302 transitions. [2020-09-17 15:08:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:18,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:18,348 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:18,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:18,551 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:18,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1285803007, now seen corresponding path program 251 times [2020-09-17 15:08:18,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:18,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679774272] [2020-09-17 15:08:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:19,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679774272] [2020-09-17 15:08:19,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652571970] [2020-09-17 15:08:19,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:19,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:08:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:19,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:19,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:19,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1549985319] [2020-09-17 15:08:19,828 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:19,831 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:19,842 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:19,842 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:19,846 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:19,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:19,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:19,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:19,961 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [119434#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:08:19,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:19,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:19,962 INFO L87 Difference]: Start difference. First operand 118 states and 302 transitions. Second operand 36 states. [2020-09-17 15:08:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:24,632 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-17 15:08:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:08:24,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:24,635 INFO L225 Difference]: With dead ends: 181 [2020-09-17 15:08:24,635 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 15:08:24,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2354, Invalid=6202, Unknown=0, NotChecked=0, Total=8556 [2020-09-17 15:08:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 15:08:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-17 15:08:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 15:08:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 308 transitions. [2020-09-17 15:08:24,638 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 308 transitions. Word has length 39 [2020-09-17 15:08:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:24,639 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 308 transitions. [2020-09-17 15:08:24,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 308 transitions. [2020-09-17 15:08:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:24,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:24,639 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:24,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:24,841 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:24,841 INFO L82 PathProgramCache]: Analyzing trace with hash -136082079, now seen corresponding path program 252 times [2020-09-17 15:08:24,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:24,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110518838] [2020-09-17 15:08:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:25,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110518838] [2020-09-17 15:08:25,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965282886] [2020-09-17 15:08:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:26,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:08:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:26,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:26,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:26,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [666942861] [2020-09-17 15:08:26,113 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:26,115 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:26,127 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:26,127 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:26,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:26,131 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:26,221 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:26,221 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:26,238 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [120119#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:08:26,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:26,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:26,239 INFO L87 Difference]: Start difference. First operand 120 states and 308 transitions. Second operand 36 states. [2020-09-17 15:08:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:31,121 INFO L93 Difference]: Finished difference Result 179 states and 428 transitions. [2020-09-17 15:08:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-17 15:08:31,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:31,124 INFO L225 Difference]: With dead ends: 179 [2020-09-17 15:08:31,124 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 15:08:31,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2531, Invalid=6399, Unknown=0, NotChecked=0, Total=8930 [2020-09-17 15:08:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 15:08:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2020-09-17 15:08:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 15:08:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 314 transitions. [2020-09-17 15:08:31,128 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 314 transitions. Word has length 39 [2020-09-17 15:08:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:31,128 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 314 transitions. [2020-09-17 15:08:31,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 314 transitions. [2020-09-17 15:08:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:31,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:31,129 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:31,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2020-09-17 15:08:31,332 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2038972227, now seen corresponding path program 253 times [2020-09-17 15:08:31,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:31,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744023040] [2020-09-17 15:08:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:32,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744023040] [2020-09-17 15:08:32,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307639305] [2020-09-17 15:08:32,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:32,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:32,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:32,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:32,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [173579320] [2020-09-17 15:08:32,653 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:32,655 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:32,668 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:32,668 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:32,672 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:32,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:32,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:32,769 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:32,786 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [120810#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:08:32,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:32,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:32,787 INFO L87 Difference]: Start difference. First operand 122 states and 314 transitions. Second operand 36 states. [2020-09-17 15:08:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:37,972 INFO L93 Difference]: Finished difference Result 177 states and 426 transitions. [2020-09-17 15:08:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-17 15:08:37,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:37,976 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:08:37,976 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:08:37,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2724, Invalid=6588, Unknown=0, NotChecked=0, Total=9312 [2020-09-17 15:08:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:08:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-17 15:08:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 15:08:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 320 transitions. [2020-09-17 15:08:37,979 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 320 transitions. Word has length 39 [2020-09-17 15:08:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:37,979 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 320 transitions. [2020-09-17 15:08:37,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 320 transitions. [2020-09-17 15:08:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:37,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:37,980 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:38,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-17 15:08:38,185 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash 789840293, now seen corresponding path program 254 times [2020-09-17 15:08:38,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:38,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605541118] [2020-09-17 15:08:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:39,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605541118] [2020-09-17 15:08:39,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47226449] [2020-09-17 15:08:39,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:39,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:08:39,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1031596833] [2020-09-17 15:08:39,503 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:39,506 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:39,522 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:39,523 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:39,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:39,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:39,624 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:39,624 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:39,642 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [121507#(and (<= ~j~0 32) (< ~i~0 46))] [2020-09-17 15:08:39,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:39,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:39,644 INFO L87 Difference]: Start difference. First operand 124 states and 320 transitions. Second operand 36 states. [2020-09-17 15:08:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:44,951 INFO L93 Difference]: Finished difference Result 177 states and 429 transitions. [2020-09-17 15:08:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-17 15:08:44,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:44,955 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:08:44,955 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:08:44,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2933, Invalid=6769, Unknown=0, NotChecked=0, Total=9702 [2020-09-17 15:08:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:08:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2020-09-17 15:08:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-17 15:08:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 328 transitions. [2020-09-17 15:08:44,959 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 328 transitions. Word has length 39 [2020-09-17 15:08:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:44,959 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 328 transitions. [2020-09-17 15:08:44,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 328 transitions. [2020-09-17 15:08:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:44,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:44,960 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:45,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:45,165 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 806417543, now seen corresponding path program 255 times [2020-09-17 15:08:45,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:45,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346515852] [2020-09-17 15:08:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:46,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346515852] [2020-09-17 15:08:46,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963228815] [2020-09-17 15:08:46,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:46,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:08:46,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:46,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:46,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:46,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:46,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1686724538] [2020-09-17 15:08:46,510 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:46,512 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:46,524 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:46,524 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:46,528 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:46,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:46,620 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:46,620 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:46,638 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [122212#(and (<= ~j~0 34) (< ~i~0 46))] [2020-09-17 15:08:46,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:46,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:46,639 INFO L87 Difference]: Start difference. First operand 126 states and 328 transitions. Second operand 36 states. [2020-09-17 15:08:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:51,963 INFO L93 Difference]: Finished difference Result 178 states and 439 transitions. [2020-09-17 15:08:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-09-17 15:08:51,966 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:51,966 INFO L225 Difference]: With dead ends: 178 [2020-09-17 15:08:51,966 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 15:08:51,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3156, Invalid=6944, Unknown=0, NotChecked=0, Total=10100 [2020-09-17 15:08:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 15:08:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 94. [2020-09-17 15:08:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:08:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 231 transitions. [2020-09-17 15:08:51,970 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 231 transitions. Word has length 39 [2020-09-17 15:08:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:51,970 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 231 transitions. [2020-09-17 15:08:51,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 231 transitions. [2020-09-17 15:08:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:08:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:51,970 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:52,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-17 15:08:52,171 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 74069812, now seen corresponding path program 256 times [2020-09-17 15:08:52,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:52,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155464151] [2020-09-17 15:08:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155464151] [2020-09-17 15:08:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742055306] [2020-09-17 15:08:53,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:53,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:08:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:08:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:53,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:53,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:08:53,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [865560153] [2020-09-17 15:08:53,851 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:53,854 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:53,867 INFO L274 McrAutomatonBuilder]: Finished intersection with 49 states and 56 transitions. [2020-09-17 15:08:53,867 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:53,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:53,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:53,986 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:53,986 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:54,008 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [122862#(and (<= ~j~0 8) (< ~i~0 46))] [2020-09-17 15:08:54,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:08:54,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:08:54,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:08:54,009 INFO L87 Difference]: Start difference. First operand 94 states and 231 transitions. Second operand 37 states. [2020-09-17 15:08:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:56,788 INFO L93 Difference]: Finished difference Result 174 states and 396 transitions. [2020-09-17 15:08:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:08:56,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:08:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:56,791 INFO L225 Difference]: With dead ends: 174 [2020-09-17 15:08:56,791 INFO L226 Difference]: Without dead ends: 168 [2020-09-17 15:08:56,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1472, Invalid=3640, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:08:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-17 15:08:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 101. [2020-09-17 15:08:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:08:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 250 transitions. [2020-09-17 15:08:56,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 250 transitions. Word has length 40 [2020-09-17 15:08:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:56,794 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 250 transitions. [2020-09-17 15:08:56,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:08:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 250 transitions. [2020-09-17 15:08:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:08:56,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:56,794 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:56,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-17 15:08:56,995 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash -235937002, now seen corresponding path program 257 times [2020-09-17 15:08:56,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:56,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343877445] [2020-09-17 15:08:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:58,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343877445] [2020-09-17 15:08:58,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460821945] [2020-09-17 15:08:58,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:58,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:08:58,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:08:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:58,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:58,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:08:58,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410175431] [2020-09-17 15:08:58,700 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:58,703 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:58,716 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:08:58,716 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:58,719 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:58,719 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:58,824 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:58,824 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:58,845 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [123462#(and (<= ~j~0 10) (< ~i~0 46))] [2020-09-17 15:08:58,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:08:58,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:58,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:08:58,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:08:58,846 INFO L87 Difference]: Start difference. First operand 101 states and 250 transitions. Second operand 37 states. [2020-09-17 15:09:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:01,806 INFO L93 Difference]: Finished difference Result 171 states and 392 transitions. [2020-09-17 15:09:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:09:01,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:01,810 INFO L225 Difference]: With dead ends: 171 [2020-09-17 15:09:01,810 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 15:09:01,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1474, Invalid=3928, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:09:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 15:09:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 103. [2020-09-17 15:09:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:09:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 256 transitions. [2020-09-17 15:09:01,812 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 256 transitions. Word has length 40 [2020-09-17 15:09:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:01,812 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 256 transitions. [2020-09-17 15:09:01,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 256 transitions. [2020-09-17 15:09:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:01,813 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:02,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-17 15:09:02,021 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1420615816, now seen corresponding path program 258 times [2020-09-17 15:09:02,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:02,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132696925] [2020-09-17 15:09:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:03,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132696925] [2020-09-17 15:09:03,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354173658] [2020-09-17 15:09:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:03,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:09:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:03,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:03,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:03,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1244490106] [2020-09-17 15:09:03,653 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:03,656 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:03,668 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:03,669 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:03,671 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:03,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:03,787 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:03,788 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:03,809 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [124067#(and (<= ~j~0 12) (< ~i~0 46))] [2020-09-17 15:09:03,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:03,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:03,810 INFO L87 Difference]: Start difference. First operand 103 states and 256 transitions. Second operand 37 states. [2020-09-17 15:09:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:07,036 INFO L93 Difference]: Finished difference Result 169 states and 390 transitions. [2020-09-17 15:09:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:09:07,039 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:07,040 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:09:07,040 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:09:07,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1492, Invalid=4208, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:09:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:09:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 105. [2020-09-17 15:09:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:09:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 262 transitions. [2020-09-17 15:09:07,043 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 262 transitions. Word has length 40 [2020-09-17 15:09:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:07,043 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 262 transitions. [2020-09-17 15:09:07,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 262 transitions. [2020-09-17 15:09:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:07,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:07,043 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:07,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-17 15:09:07,244 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -742519718, now seen corresponding path program 259 times [2020-09-17 15:09:07,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:07,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261560177] [2020-09-17 15:09:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:08,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261560177] [2020-09-17 15:09:08,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664695041] [2020-09-17 15:09:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:08,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:08,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:08,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1158968947] [2020-09-17 15:09:08,819 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:08,822 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:08,835 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:08,835 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:08,837 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:08,837 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:08,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:08,947 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:08,969 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [124678#(and (<= ~j~0 14) (< ~i~0 46))] [2020-09-17 15:09:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:08,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:08,971 INFO L87 Difference]: Start difference. First operand 105 states and 262 transitions. Second operand 37 states. [2020-09-17 15:09:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:12,398 INFO L93 Difference]: Finished difference Result 167 states and 388 transitions. [2020-09-17 15:09:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:09:12,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:12,401 INFO L225 Difference]: With dead ends: 167 [2020-09-17 15:09:12,401 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 15:09:12,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1526, Invalid=4480, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:09:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 15:09:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2020-09-17 15:09:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:09:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 268 transitions. [2020-09-17 15:09:12,404 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 268 transitions. Word has length 40 [2020-09-17 15:09:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:12,404 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 268 transitions. [2020-09-17 15:09:12,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 268 transitions. [2020-09-17 15:09:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:12,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:12,405 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:12,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-17 15:09:12,606 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 308464060, now seen corresponding path program 260 times [2020-09-17 15:09:12,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:12,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234078486] [2020-09-17 15:09:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:14,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234078486] [2020-09-17 15:09:14,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609270765] [2020-09-17 15:09:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:14,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:09:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:14,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:14,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:14,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1023163033] [2020-09-17 15:09:14,168 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:14,171 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:14,183 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:14,183 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:14,185 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:14,186 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:14,290 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:14,290 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:14,312 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [125295#(and (<= ~j~0 16) (< ~i~0 46))] [2020-09-17 15:09:14,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:14,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:14,313 INFO L87 Difference]: Start difference. First operand 107 states and 268 transitions. Second operand 37 states. [2020-09-17 15:09:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:17,992 INFO L93 Difference]: Finished difference Result 165 states and 386 transitions. [2020-09-17 15:09:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:09:17,995 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:17,995 INFO L225 Difference]: With dead ends: 165 [2020-09-17 15:09:17,995 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 15:09:17,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1576, Invalid=4744, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:09:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 15:09:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 109. [2020-09-17 15:09:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:09:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 274 transitions. [2020-09-17 15:09:17,998 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 274 transitions. Word has length 40 [2020-09-17 15:09:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:17,998 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 274 transitions. [2020-09-17 15:09:17,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 274 transitions. [2020-09-17 15:09:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:17,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:17,999 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:18,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:18,201 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1954248606, now seen corresponding path program 261 times [2020-09-17 15:09:18,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:18,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104854738] [2020-09-17 15:09:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:19,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104854738] [2020-09-17 15:09:19,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334772470] [2020-09-17 15:09:19,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:19,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:09:19,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:19,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:19,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [932050669] [2020-09-17 15:09:19,734 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:19,738 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:19,750 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:19,750 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:19,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:19,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:19,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:19,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:19,887 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [125918#(and (<= ~j~0 18) (< ~i~0 46))] [2020-09-17 15:09:19,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:19,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:19,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:19,888 INFO L87 Difference]: Start difference. First operand 109 states and 274 transitions. Second operand 37 states. [2020-09-17 15:09:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:23,871 INFO L93 Difference]: Finished difference Result 163 states and 384 transitions. [2020-09-17 15:09:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:09:23,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:23,874 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:09:23,875 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:09:23,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1642, Invalid=5000, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:09:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:09:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 111. [2020-09-17 15:09:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:09:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-09-17 15:09:23,878 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 40 [2020-09-17 15:09:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:23,878 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-09-17 15:09:23,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-09-17 15:09:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:23,878 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:24,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:24,079 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1330263552, now seen corresponding path program 262 times [2020-09-17 15:09:24,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:24,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022850779] [2020-09-17 15:09:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022850779] [2020-09-17 15:09:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975315318] [2020-09-17 15:09:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:25,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:09:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:25,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:25,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:25,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [546816370] [2020-09-17 15:09:25,632 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:25,634 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:25,647 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:25,648 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:25,650 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:25,651 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:25,776 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:25,776 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:25,799 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [126547#(and (<= ~j~0 20) (< ~i~0 46))] [2020-09-17 15:09:25,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:25,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:25,800 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 37 states. [2020-09-17 15:09:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:29,915 INFO L93 Difference]: Finished difference Result 161 states and 382 transitions. [2020-09-17 15:09:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:09:29,917 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:29,918 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:09:29,918 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:09:29,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1724, Invalid=5248, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:09:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:09:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2020-09-17 15:09:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 15:09:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 286 transitions. [2020-09-17 15:09:29,921 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 286 transitions. Word has length 40 [2020-09-17 15:09:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:29,921 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 286 transitions. [2020-09-17 15:09:29,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 286 transitions. [2020-09-17 15:09:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:29,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:29,921 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:30,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:30,122 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1575410462, now seen corresponding path program 263 times [2020-09-17 15:09:30,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:30,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396205894] [2020-09-17 15:09:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:31,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396205894] [2020-09-17 15:09:31,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256676427] [2020-09-17 15:09:31,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:31,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:09:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:31,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:31,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:31,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1510525194] [2020-09-17 15:09:31,598 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:31,600 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:31,613 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:31,613 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:31,615 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:31,616 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:31,730 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:31,730 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:31,752 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [127182#(and (<= ~j~0 22) (< ~i~0 46))] [2020-09-17 15:09:31,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:31,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:31,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:31,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:31,753 INFO L87 Difference]: Start difference. First operand 113 states and 286 transitions. Second operand 37 states. [2020-09-17 15:09:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:36,154 INFO L93 Difference]: Finished difference Result 159 states and 380 transitions. [2020-09-17 15:09:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:09:36,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:36,158 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:09:36,158 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:09:36,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1822, Invalid=5488, Unknown=0, NotChecked=0, Total=7310 [2020-09-17 15:09:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:09:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2020-09-17 15:09:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 15:09:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 292 transitions. [2020-09-17 15:09:36,161 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 292 transitions. Word has length 40 [2020-09-17 15:09:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:36,161 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 292 transitions. [2020-09-17 15:09:36,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 292 transitions. [2020-09-17 15:09:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:36,162 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:36,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:36,363 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -130390972, now seen corresponding path program 264 times [2020-09-17 15:09:36,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:36,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714667633] [2020-09-17 15:09:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:37,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714667633] [2020-09-17 15:09:37,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271352059] [2020-09-17 15:09:37,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:37,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:09:37,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:37,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:37,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:37,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [832729476] [2020-09-17 15:09:37,879 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:37,882 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:37,895 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:37,895 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:37,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:37,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:38,006 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:38,006 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:38,028 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [127823#(and (<= ~j~0 24) (< ~i~0 46))] [2020-09-17 15:09:38,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:38,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:38,029 INFO L87 Difference]: Start difference. First operand 115 states and 292 transitions. Second operand 37 states. [2020-09-17 15:09:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:42,854 INFO L93 Difference]: Finished difference Result 157 states and 378 transitions. [2020-09-17 15:09:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:09:42,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:42,858 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:09:42,858 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:09:42,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1936, Invalid=5720, Unknown=0, NotChecked=0, Total=7656 [2020-09-17 15:09:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:09:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2020-09-17 15:09:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 15:09:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 298 transitions. [2020-09-17 15:09:42,861 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 298 transitions. Word has length 40 [2020-09-17 15:09:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:42,861 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 298 transitions. [2020-09-17 15:09:42,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 298 transitions. [2020-09-17 15:09:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:42,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:42,862 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:43,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-17 15:09:43,063 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash -888663002, now seen corresponding path program 265 times [2020-09-17 15:09:43,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:43,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190839687] [2020-09-17 15:09:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:44,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190839687] [2020-09-17 15:09:44,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177159697] [2020-09-17 15:09:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:44,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:44,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:44,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [95131639] [2020-09-17 15:09:44,559 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:44,562 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:44,574 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:44,575 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:44,577 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:44,577 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:44,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:44,682 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:44,703 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [128470#(and (<= ~j~0 26) (< ~i~0 46))] [2020-09-17 15:09:44,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:44,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:44,704 INFO L87 Difference]: Start difference. First operand 117 states and 298 transitions. Second operand 37 states. [2020-09-17 15:09:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:49,566 INFO L93 Difference]: Finished difference Result 155 states and 376 transitions. [2020-09-17 15:09:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:09:49,569 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:49,570 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:09:49,570 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:09:49,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2066, Invalid=5944, Unknown=0, NotChecked=0, Total=8010 [2020-09-17 15:09:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:09:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2020-09-17 15:09:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 15:09:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 304 transitions. [2020-09-17 15:09:49,573 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 304 transitions. Word has length 40 [2020-09-17 15:09:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:49,573 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 304 transitions. [2020-09-17 15:09:49,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 304 transitions. [2020-09-17 15:09:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:49,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:49,574 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:49,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-17 15:09:49,775 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1675908232, now seen corresponding path program 266 times [2020-09-17 15:09:49,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:49,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024216038] [2020-09-17 15:09:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:51,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024216038] [2020-09-17 15:09:51,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202103628] [2020-09-17 15:09:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:51,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:09:51,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:51,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:51,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:51,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347413655] [2020-09-17 15:09:51,252 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:51,255 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:51,267 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:51,268 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:51,270 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:51,270 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:51,376 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:51,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:51,398 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [129123#(and (<= ~j~0 28) (< ~i~0 46))] [2020-09-17 15:09:51,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:51,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:51,399 INFO L87 Difference]: Start difference. First operand 119 states and 304 transitions. Second operand 37 states. [2020-09-17 15:09:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:56,566 INFO L93 Difference]: Finished difference Result 153 states and 374 transitions. [2020-09-17 15:09:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:09:56,569 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:09:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:56,570 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:09:56,570 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:09:56,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2212, Invalid=6160, Unknown=0, NotChecked=0, Total=8372 [2020-09-17 15:09:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:09:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-09-17 15:09:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 15:09:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 310 transitions. [2020-09-17 15:09:56,573 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 310 transitions. Word has length 40 [2020-09-17 15:09:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:56,573 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 310 transitions. [2020-09-17 15:09:56,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:09:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 310 transitions. [2020-09-17 15:09:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:09:56,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:56,574 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:56,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-17 15:09:56,775 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1043940714, now seen corresponding path program 267 times [2020-09-17 15:09:56,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:56,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166914631] [2020-09-17 15:09:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:58,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166914631] [2020-09-17 15:09:58,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703779887] [2020-09-17 15:09:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:58,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:09:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:58,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-17 15:09:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:58,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:58,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-17 15:09:58,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705492225] [2020-09-17 15:09:58,242 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:58,245 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:58,259 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-17 15:09:58,259 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:58,262 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:58,262 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:58,375 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:58,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:58,400 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [129782#(and (<= ~j~0 30) (< ~i~0 46))] [2020-09-17 15:09:58,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-17 15:09:58,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-17 15:09:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 15:09:58,401 INFO L87 Difference]: Start difference. First operand 121 states and 310 transitions. Second operand 37 states. [2020-09-17 15:10:03,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:10:03,962 INFO L93 Difference]: Finished difference Result 151 states and 372 transitions. [2020-09-17 15:10:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:10:03,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-17 15:10:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:10:03,966 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:10:03,966 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:10:03,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2374, Invalid=6368, Unknown=0, NotChecked=0, Total=8742 [2020-09-17 15:10:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:10:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2020-09-17 15:10:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-17 15:10:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 316 transitions. [2020-09-17 15:10:03,970 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 316 transitions. Word has length 40 [2020-09-17 15:10:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:10:03,970 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 316 transitions. [2020-09-17 15:10:03,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-17 15:10:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 316 transitions. [2020-09-17 15:10:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-17 15:10:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:10:03,970 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:10:04,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-17 15:10:04,171 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:10:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:10:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash -377944372, now seen corresponding path program 268 times [2020-09-17 15:10:04,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:10:04,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543924907] [2020-09-17 15:10:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:10:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat