/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.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:16:08,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:16:08,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:16:08,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:16:08,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:16:08,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:16:08,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:16:08,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:16:08,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:16:08,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:16:08,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:16:08,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:16:08,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:16:08,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:16:08,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:16:08,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:16:08,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:16:08,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:16:08,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:16:08,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:16:08,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:16:08,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:16:08,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:16:08,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:16:08,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-11 16:16:08,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:16:08,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:16:08,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:16:08,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:16:08,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:16:08,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:16:08,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:16:08,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:16:08,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:16:08,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:16:08,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:16:08,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 16:16:08,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:16:08,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:16:08,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:16:08,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:16:08,921 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:16:08,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:16:08,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:16:08,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:16:08,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:16:08,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:16:08,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:16:08,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:16:08,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:16:08,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:16:08,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:16:08,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:16:08,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:16:08,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:16:08,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:16:08,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:16:08,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:16:08,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:08,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:16:08,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:16:08,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:16:08,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:16:08,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:16:08,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:16:08,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:16:09,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:16:09,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:16:09,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:16:09,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:16:09,449 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:16:09,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-11 16:16:09,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90b3d5411/911c3272384d478fa8c5a77739c09de9/FLAGdd25620be [2020-09-11 16:16:10,164 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:16:10,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-11 16:16:10,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90b3d5411/911c3272384d478fa8c5a77739c09de9/FLAGdd25620be [2020-09-11 16:16:10,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90b3d5411/911c3272384d478fa8c5a77739c09de9 [2020-09-11 16:16:10,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:16:10,473 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:16:10,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:10,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:16:10,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:16:10,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:10" (1/1) ... [2020-09-11 16:16:10,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8901ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:10, skipping insertion in model container [2020-09-11 16:16:10,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:10" (1/1) ... [2020-09-11 16:16:10,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:16:10,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:16:11,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:11,090 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:16:11,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:11,283 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:16:11,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11 WrapperNode [2020-09-11 16:16:11,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:11,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:11,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:16:11,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:16:11,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:11,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:16:11,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:16:11,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:16:11,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... [2020-09-11 16:16:11,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:16:11,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:16:11,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:16:11,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:16:11,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:16:11,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:16:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:16:11,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:16:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:16:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:16:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:16:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:16:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:16:11,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:16:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:16:11,529 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:16:11,919 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:16:11,920 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:16:11,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:11 BoogieIcfgContainer [2020-09-11 16:16:11,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:16:11,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:16:11,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:16:11,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:16:11,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:16:10" (1/3) ... [2020-09-11 16:16:11,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3186ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:11, skipping insertion in model container [2020-09-11 16:16:11,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:11" (2/3) ... [2020-09-11 16:16:11,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3186ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:11, skipping insertion in model container [2020-09-11 16:16:11,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:11" (3/3) ... [2020-09-11 16:16:11,942 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-09-11 16:16:11,954 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:16:11,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:16:11,966 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:16:11,967 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:16:11,997 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,998 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,998 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,998 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,999 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,999 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:11,999 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,000 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,000 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,000 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,001 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,001 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,001 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,001 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,002 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,002 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,002 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,003 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,003 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,003 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,003 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,004 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,004 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,004 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,004 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,004 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,005 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,005 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,019 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,020 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,020 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:12,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:16:12,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:16:12,074 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:16:12,074 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:16:12,074 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:16:12,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:16:12,075 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:16:12,075 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:16:12,075 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:16:12,092 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:12,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:12,134 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:12,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:12,142 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. [2020-09-11 16:16:12,144 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:12,163 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:12,163 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:12,164 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. [2020-09-11 16:16:12,166 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 16:16:12,168 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:16:12,477 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-09-11 16:16:13,441 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 16:16:13,680 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 16:16:13,680 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 16:16:13,686 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:16:13,703 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:16:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:16:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:16:13,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:13,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 16:16:13,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457972397] [2020-09-11 16:16:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457972397] [2020-09-11 16:16:14,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:14,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:16:14,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721390727] [2020-09-11 16:16:14,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:16:14,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:16:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:16:14,053 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:16:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,172 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 16:16:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:16:14,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:16:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,192 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:14,192 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 16:16:14,194 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 [2020-09-11 16:16:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 16:16:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 16:16:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 16:16:14,234 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 16:16:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,234 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 16:16:14,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:16:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 16:16:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:16:14,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:16:14,236 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 16:16:14,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646477817] [2020-09-11 16:16:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646477817] [2020-09-11 16:16:14,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:14,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:16:14,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285840520] [2020-09-11 16:16:14,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:16:14,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:16:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:16:14,411 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 16:16:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,449 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 16:16:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 16:16:14,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:16:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,452 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:14,452 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 16:16:14,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 16:16:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 16:16:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 16:16:14,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 16:16:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,463 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 16:16:14,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:16:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 16:16:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:14,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:16:14,465 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 16:16:14,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280940334] [2020-09-11 16:16:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280940334] [2020-09-11 16:16:14,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:14,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:14,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191999225] [2020-09-11 16:16:14,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:14,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:14,577 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 16:16:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,682 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 16:16:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:14,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,685 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:14,685 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:14,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 16:16:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:14,705 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 16:16:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,705 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:14,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:16:14,708 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 16:16:14,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157992666] [2020-09-11 16:16:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157992666] [2020-09-11 16:16:14,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:14,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381952478] [2020-09-11 16:16:14,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:14,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:14,812 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 16:16:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,886 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:14,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,888 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:14,888 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:14,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 16:16:14,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 16:16:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,895 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 16:16:14,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 16:16:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:14,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:16:14,897 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 16:16:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689196153] [2020-09-11 16:16:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689196153] [2020-09-11 16:16:14,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:14,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:14,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92923841] [2020-09-11 16:16:14,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:14,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:14,969 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 16:16:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,082 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 16:16:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:15,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,084 INFO L225 Difference]: With dead ends: 57 [2020-09-11 16:16:15,084 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 16:16:15,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 16:16:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 16:16:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:15,091 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 16:16:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,092 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:15,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:15,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,093 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 16:16:15,093 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 16:16:15,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817305159] [2020-09-11 16:16:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817305159] [2020-09-11 16:16:15,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608981324] [2020-09-11 16:16:15,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:15,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:15,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:15,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295994292] [2020-09-11 16:16:15,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:15,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:15,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:15,330 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 16:16:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,475 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 16:16:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:15,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,476 INFO L225 Difference]: With dead ends: 48 [2020-09-11 16:16:15,476 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:15,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 16:16:15,483 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 16:16:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,483 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 16:16:15,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 16:16:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:15,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,484 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 16:16:15,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,688 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 16:16:15,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086450865] [2020-09-11 16:16:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086450865] [2020-09-11 16:16:15,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370476962] [2020-09-11 16:16:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:15,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:15,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:15,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774080430] [2020-09-11 16:16:15,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:15,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:15,868 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 16:16:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,932 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:15,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,933 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:15,933 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:15,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 16:16:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 16:16:15,939 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 16:16:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,939 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 16:16:15,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 16:16:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:15,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,940 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,153 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 16:16:16,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271009624] [2020-09-11 16:16:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271009624] [2020-09-11 16:16:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423851937] [2020-09-11 16:16:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:16,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:16,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801975980] [2020-09-11 16:16:16,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:16,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:16,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:16,339 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 16:16:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:16,461 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 16:16:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:16:16,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:16,463 INFO L225 Difference]: With dead ends: 58 [2020-09-11 16:16:16,463 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 16:16:16,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 16:16:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 16:16:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:16,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 16:16:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:16,478 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:16,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:16,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:16,479 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,681 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 16:16:16,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102976862] [2020-09-11 16:16:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102976862] [2020-09-11 16:16:16,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978913150] [2020-09-11 16:16:16,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:16,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301863757] [2020-09-11 16:16:16,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:16,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:16,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:16,861 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 16:16:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,058 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:17,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,061 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:17,061 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:17,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 16:16:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 16:16:17,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 16:16:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,077 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 16:16:17,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 16:16:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:17,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,078 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:17,292 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 16:16:17,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907986785] [2020-09-11 16:16:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907986785] [2020-09-11 16:16:17,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521492448] [2020-09-11 16:16:17,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:17,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:17,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:17,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:17,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:17,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216288756] [2020-09-11 16:16:17,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:17,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:17,469 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 16:16:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,693 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 16:16:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:17,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,695 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:17,695 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:17,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 16:16:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 16:16:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 16:16:17,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 16:16:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,703 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 16:16:17,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 16:16:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:17,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 16:16:17,918 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 16:16:17,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872498626] [2020-09-11 16:16:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872498626] [2020-09-11 16:16:17,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157907419] [2020-09-11 16:16:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:18,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:16:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:18,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225774874] [2020-09-11 16:16:18,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:18,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:18,084 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 16:16:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,224 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 16:16:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:18,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,225 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:16:18,226 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 16:16:18,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 16:16:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 16:16:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 16:16:18,234 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 16:16:18,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,234 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 16:16:18,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 16:16:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:18,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:18,446 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 16:16:18,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985638348] [2020-09-11 16:16:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985638348] [2020-09-11 16:16:18,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14416109] [2020-09-11 16:16:18,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:18,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:18,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113232499] [2020-09-11 16:16:18,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:18,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:18,613 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 16:16:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,815 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 16:16:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:18,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,817 INFO L225 Difference]: With dead ends: 61 [2020-09-11 16:16:18,817 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:18,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 16:16:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:18,822 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 16:16:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,822 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:18,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:18,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,031 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 16:16:19,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065955810] [2020-09-11 16:16:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065955810] [2020-09-11 16:16:19,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689586827] [2020-09-11 16:16:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:19,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:19,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027178326] [2020-09-11 16:16:19,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:19,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:19,219 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 16:16:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,365 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:19,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,367 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:19,367 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:19,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 16:16:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 16:16:19,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 16:16:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,372 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 16:16:19,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 16:16:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:19,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 16:16:19,583 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 16:16:19,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099459103] [2020-09-11 16:16:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099459103] [2020-09-11 16:16:19,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021506164] [2020-09-11 16:16:19,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:19,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:19,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240981145] [2020-09-11 16:16:19,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:19,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:19,779 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 16:16:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,986 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-11 16:16:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:19,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,987 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:19,988 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:19,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-11 16:16:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 16:16:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 16:16:19,993 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 16:16:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,996 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 16:16:19,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 16:16:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:19,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,210 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 16:16:20,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730853839] [2020-09-11 16:16:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730853839] [2020-09-11 16:16:20,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895125759] [2020-09-11 16:16:20,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:20,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:20,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:20,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:20,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976240416] [2020-09-11 16:16:20,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:20,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:20,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:20,399 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 16:16:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,615 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 16:16:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:20,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,616 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:20,617 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:20,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 16:16:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:20,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 16:16:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,621 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:20,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:20,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,622 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:16:20,831 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 16:16:20,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746721145] [2020-09-11 16:16:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746721145] [2020-09-11 16:16:20,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486947273] [2020-09-11 16:16:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:20,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:20,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:21,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615244678] [2020-09-11 16:16:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:21,041 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 16:16:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,262 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 16:16:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:21,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,264 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:21,264 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 16:16:21,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 16:16:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 16:16:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 16:16:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 16:16:21,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 16:16:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,270 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 16:16:21,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 16:16:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:21,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:16:21,472 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 16:16:21,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:21,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524928038] [2020-09-11 16:16:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524928038] [2020-09-11 16:16:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041941290] [2020-09-11 16:16:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:21,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:21,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640750749] [2020-09-11 16:16:21,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:21,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:21,640 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 16:16:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,781 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 16:16:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:21,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,782 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:21,782 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:21,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 16:16:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 16:16:21,786 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 16:16:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,787 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 16:16:21,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 16:16:21,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:21,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,789 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:16:21,999 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 16:16:22,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769561142] [2020-09-11 16:16:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769561142] [2020-09-11 16:16:22,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480261971] [2020-09-11 16:16:22,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:22,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:22,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448934172] [2020-09-11 16:16:22,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:22,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:22,175 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 16:16:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,339 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 16:16:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:22,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,340 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:22,340 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:22,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 16:16:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:22,344 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 16:16:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,344 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:22,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:22,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,345 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:16:22,553 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 16:16:22,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130667497] [2020-09-11 16:16:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130667497] [2020-09-11 16:16:22,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140673595] [2020-09-11 16:16:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:22,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:22,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:22,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408511807] [2020-09-11 16:16:22,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:22,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:22,773 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 16:16:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,956 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 16:16:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:22,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,958 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:22,958 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:22,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 16:16:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 16:16:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 16:16:22,962 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 16:16:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,962 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 16:16:22,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 16:16:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:22,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:23,172 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 16:16:23,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426860852] [2020-09-11 16:16:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426860852] [2020-09-11 16:16:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930941571] [2020-09-11 16:16:23,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:23,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:23,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314487869] [2020-09-11 16:16:23,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:23,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:23,390 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 16:16:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:23,601 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 16:16:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:23,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:23,602 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:23,602 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:23,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 16:16:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:23,605 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 16:16:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:23,607 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:23,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:23,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:23,608 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:23,815 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 16:16:23,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114116240] [2020-09-11 16:16:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114116240] [2020-09-11 16:16:23,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863927450] [2020-09-11 16:16:23,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:23,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870454069] [2020-09-11 16:16:23,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:23,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:23,984 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 16:16:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,185 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:24,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,187 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:24,188 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:24,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 16:16:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 16:16:24,192 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 16:16:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,192 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 16:16:24,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 16:16:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:24,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,193 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:24,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:24,403 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 16:16:24,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:24,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186270945] [2020-09-11 16:16:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186270945] [2020-09-11 16:16:24,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146126649] [2020-09-11 16:16:24,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:24,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:24,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:24,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185126772] [2020-09-11 16:16:24,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:24,573 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 16:16:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,865 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 16:16:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:24,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,866 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:24,866 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:24,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 16:16:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 16:16:24,870 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 16:16:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,870 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 16:16:24,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 16:16:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:16:25,079 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 16:16:25,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978657988] [2020-09-11 16:16:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978657988] [2020-09-11 16:16:25,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314683313] [2020-09-11 16:16:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:25,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:25,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364786462] [2020-09-11 16:16:25,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:25,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:25,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:25,284 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 16:16:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:25,453 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 16:16:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:25,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:25,455 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:25,455 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:25,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 16:16:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:25,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:25,459 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:25,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:25,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:25,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 16:16:25,670 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 16:16:25,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473400128] [2020-09-11 16:16:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473400128] [2020-09-11 16:16:25,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634906151] [2020-09-11 16:16:25,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:25,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:25,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711083163] [2020-09-11 16:16:25,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:25,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:25,880 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,126 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 16:16:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:26,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,127 INFO L225 Difference]: With dead ends: 71 [2020-09-11 16:16:26,127 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 16:16:26,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 16:16:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 16:16:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:26,130 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,131 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:26,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:26,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:16:26,338 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 16:16:26,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068391348] [2020-09-11 16:16:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068391348] [2020-09-11 16:16:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255701710] [2020-09-11 16:16:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:26,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:26,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:26,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171495661] [2020-09-11 16:16:26,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:26,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:26,537 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,739 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 16:16:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:26,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,741 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:26,741 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:26,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 16:16:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:26,745 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,745 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:26,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:26,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:16:26,955 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 16:16:26,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878355837] [2020-09-11 16:16:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878355837] [2020-09-11 16:16:27,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223304404] [2020-09-11 16:16:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:27,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:27,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:27,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324652410] [2020-09-11 16:16:27,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:27,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:27,160 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,477 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 16:16:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:27,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,479 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:27,479 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:27,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 16:16:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:27,482 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,482 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:27,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:27,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:16:27,691 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 16:16:27,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738194037] [2020-09-11 16:16:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738194037] [2020-09-11 16:16:27,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694359952] [2020-09-11 16:16:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:27,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659967728] [2020-09-11 16:16:27,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:27,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:27,855 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,130 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:28,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,131 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:28,131 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:28,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 16:16:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 16:16:28,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 16:16:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,134 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 16:16:28,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 16:16:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:28,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:28,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:28,336 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 16:16:28,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:28,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84484733] [2020-09-11 16:16:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84484733] [2020-09-11 16:16:28,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51986993] [2020-09-11 16:16:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:28,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:28,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:28,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:28,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:28,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185051851] [2020-09-11 16:16:28,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:28,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:28,521 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 16:16:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,806 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-11 16:16:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:28,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,807 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:28,808 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:28,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-11 16:16:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 16:16:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 16:16:28,811 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 16:16:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,811 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 16:16:28,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 16:16:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:28,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:16:29,021 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 16:16:29,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865390422] [2020-09-11 16:16:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865390422] [2020-09-11 16:16:29,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728915972] [2020-09-11 16:16:29,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:29,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:29,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:29,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449156384] [2020-09-11 16:16:29,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:29,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:29,207 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 16:16:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:29,557 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 16:16:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:29,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:29,559 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:29,559 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:29,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 16:16:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:29,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 16:16:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:29,564 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:29,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:29,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:29,564 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 16:16:29,772 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 16:16:29,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845689035] [2020-09-11 16:16:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845689035] [2020-09-11 16:16:29,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641395899] [2020-09-11 16:16:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:29,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:29,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672184511] [2020-09-11 16:16:29,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:29,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:29,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:29,961 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 16:16:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,337 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 16:16:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:30,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,338 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:30,339 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:30,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 16:16:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 16:16:30,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 16:16:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,343 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 16:16:30,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 16:16:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,344 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:30,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:30,554 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 16:16:30,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:30,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114659908] [2020-09-11 16:16:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114659908] [2020-09-11 16:16:30,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820253829] [2020-09-11 16:16:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:30,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:30,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:30,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889862530] [2020-09-11 16:16:30,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:30,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:30,777 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 16:16:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,949 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 16:16:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:30,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,951 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:30,951 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:30,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 16:16:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 16:16:30,955 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 16:16:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,955 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 16:16:30,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 16:16:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,956 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:31,165 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 16:16:31,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188124582] [2020-09-11 16:16:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188124582] [2020-09-11 16:16:31,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665701930] [2020-09-11 16:16:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:31,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:31,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:31,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:31,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:31,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:31,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712352346] [2020-09-11 16:16:31,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:31,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:31,413 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 16:16:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:31,632 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 16:16:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:31,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:31,633 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:31,633 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:31,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 16:16:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 16:16:31,637 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 16:16:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:31,638 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 16:16:31,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 16:16:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:31,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:31,639 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:16:31,848 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 16:16:31,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966729814] [2020-09-11 16:16:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966729814] [2020-09-11 16:16:31,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716661871] [2020-09-11 16:16:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:32,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779692873] [2020-09-11 16:16:32,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:32,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:32,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:32,023 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 16:16:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,274 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 16:16:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:32,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,275 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:32,275 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:32,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 16:16:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:32,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 16:16:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:32,278 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:32,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:32,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:32,279 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:32,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:32,487 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:32,488 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 16:16:32,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:32,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291748001] [2020-09-11 16:16:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291748001] [2020-09-11 16:16:32,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092594791] [2020-09-11 16:16:32,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:32,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:32,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:32,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959183649] [2020-09-11 16:16:32,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:32,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:32,700 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 16:16:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,995 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 16:16:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:32,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,996 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:32,997 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:32,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 16:16:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:32,999 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 16:16:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,000 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:33,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:33,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,001 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:16:33,209 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 16:16:33,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116218408] [2020-09-11 16:16:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116218408] [2020-09-11 16:16:33,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907303549] [2020-09-11 16:16:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:33,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:33,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754715431] [2020-09-11 16:16:33,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:33,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:33,374 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 16:16:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:33,718 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 16:16:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:33,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:33,720 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:33,720 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:33,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 16:16:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:16:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 16:16:33,725 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 16:16:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,725 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 16:16:33,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 16:16:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:33,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,726 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:33,927 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 16:16:33,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059001234] [2020-09-11 16:16:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059001234] [2020-09-11 16:16:34,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879286097] [2020-09-11 16:16:34,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:34,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:34,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:34,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:34,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284574180] [2020-09-11 16:16:34,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:34,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:34,167 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 16:16:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:34,518 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 16:16:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:34,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:34,519 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:34,519 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:16:34,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:16:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 16:16:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:34,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 16:16:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:34,523 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:34,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:34,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:34,523 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:34,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:16:34,732 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 16:16:34,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:34,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736493368] [2020-09-11 16:16:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736493368] [2020-09-11 16:16:34,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365648013] [2020-09-11 16:16:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:34,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:34,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:34,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:34,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928944610] [2020-09-11 16:16:34,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:34,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:34,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:34,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:34,886 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 16:16:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:35,226 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 16:16:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:35,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:35,228 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:16:35,229 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:16:35,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:16:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 16:16:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 16:16:35,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 16:16:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:35,233 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 16:16:35,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 16:16:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:35,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:35,234 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:35,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 16:16:35,443 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 16:16:35,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:35,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967441046] [2020-09-11 16:16:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967441046] [2020-09-11 16:16:35,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090464684] [2020-09-11 16:16:35,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:35,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:35,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:35,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:35,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91783946] [2020-09-11 16:16:35,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:35,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:35,659 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 16:16:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,108 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 16:16:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:36,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,110 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:36,110 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:36,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 16:16:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 16:16:36,114 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 16:16:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,115 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 16:16:36,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 16:16:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,116 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:16:36,326 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 16:16:36,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230610048] [2020-09-11 16:16:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230610048] [2020-09-11 16:16:36,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626516588] [2020-09-11 16:16:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:36,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:36,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:36,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966528347] [2020-09-11 16:16:36,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:36,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:36,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:36,517 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 16:16:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,724 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:16:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:36,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,726 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:36,726 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:36,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 16:16:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:36,730 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,730 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:36,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:16:36,939 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 16:16:36,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453410664] [2020-09-11 16:16:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453410664] [2020-09-11 16:16:37,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698053756] [2020-09-11 16:16:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:37,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:37,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:37,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:37,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635305093] [2020-09-11 16:16:37,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:37,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:37,190 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:37,440 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 16:16:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:37,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:37,441 INFO L225 Difference]: With dead ends: 81 [2020-09-11 16:16:37,441 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:16:37,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:16:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 16:16:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:37,446 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:37,446 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:37,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:37,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:37,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:37,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:16:37,654 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 16:16:37,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:37,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626962153] [2020-09-11 16:16:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626962153] [2020-09-11 16:16:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597913577] [2020-09-11 16:16:37,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:37,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:37,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14509167] [2020-09-11 16:16:37,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:37,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:37,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:37,836 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,145 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:38,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,147 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:38,147 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:38,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 16:16:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:38,151 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,152 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:38,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:38,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:16:38,364 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 16:16:38,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:38,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711245917] [2020-09-11 16:16:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711245917] [2020-09-11 16:16:38,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692896899] [2020-09-11 16:16:38,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:38,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:38,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:38,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:38,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568769729] [2020-09-11 16:16:38,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:38,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:38,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:38,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:38,626 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,954 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:38,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,955 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:38,955 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:38,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 16:16:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:38,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,958 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:38,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:39,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 16:16:39,166 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 16:16:39,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:39,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434815464] [2020-09-11 16:16:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434815464] [2020-09-11 16:16:39,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17672114] [2020-09-11 16:16:39,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:39,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:39,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:39,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:39,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664787058] [2020-09-11 16:16:39,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:39,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:39,347 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:39,696 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 16:16:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:39,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:39,698 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:39,698 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:39,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 16:16:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:39,702 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:39,702 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:39,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:39,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:39,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:39,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:39,914 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 16:16:39,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:39,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707268643] [2020-09-11 16:16:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707268643] [2020-09-11 16:16:40,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847603087] [2020-09-11 16:16:40,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:40,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:40,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:40,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:40,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537846369] [2020-09-11 16:16:40,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:40,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:40,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:40,111 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:40,553 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 16:16:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:40,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:40,557 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:16:40,557 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:16:40,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:16:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 16:16:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:40,561 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:40,561 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:40,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:40,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:40,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:40,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:16:40,763 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 16:16:40,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:40,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940478682] [2020-09-11 16:16:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940478682] [2020-09-11 16:16:40,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029319371] [2020-09-11 16:16:40,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:40,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:40,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128547738] [2020-09-11 16:16:40,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:40,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:40,951 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:41,267 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:16:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:41,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:41,272 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:41,272 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:41,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 16:16:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:16:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 16:16:41,277 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 16:16:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:41,278 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 16:16:41,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 16:16:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:41,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:41,278 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:41,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:41,488 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 16:16:41,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:41,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770989014] [2020-09-11 16:16:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770989014] [2020-09-11 16:16:41,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241246992] [2020-09-11 16:16:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:41,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:41,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:41,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:41,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946182729] [2020-09-11 16:16:41,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:41,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:41,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:41,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:41,685 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 16:16:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:42,158 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-11 16:16:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:42,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:42,160 INFO L225 Difference]: With dead ends: 70 [2020-09-11 16:16:42,160 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:42,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-11 16:16:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 16:16:42,165 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 16:16:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:42,165 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 16:16:42,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 16:16:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:42,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:42,166 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:42,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:16:42,376 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 16:16:42,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:42,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960408321] [2020-09-11 16:16:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960408321] [2020-09-11 16:16:42,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518848892] [2020-09-11 16:16:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:42,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:42,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:42,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:42,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:42,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027850066] [2020-09-11 16:16:42,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:42,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:42,586 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 16:16:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:43,034 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 16:16:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:43,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:43,035 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:43,035 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:43,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 16:16:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:43,038 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 16:16:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:43,039 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:43,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:43,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:43,039 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:43,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:43,248 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 16:16:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802944172] [2020-09-11 16:16:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802944172] [2020-09-11 16:16:43,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898840332] [2020-09-11 16:16:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:43,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:43,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:43,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:43,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815330700] [2020-09-11 16:16:43,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:43,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:43,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:43,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:43,463 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 16:16:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:43,975 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 16:16:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:43,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:43,977 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:43,977 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:43,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 16:16:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 16:16:43,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 16:16:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:43,982 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 16:16:43,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 16:16:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:43,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:43,984 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:44,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:16:44,193 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 16:16:44,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:44,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872199695] [2020-09-11 16:16:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872199695] [2020-09-11 16:16:44,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352679636] [2020-09-11 16:16:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:44,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:44,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:44,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:44,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053406056] [2020-09-11 16:16:44,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:44,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:44,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:44,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:44,432 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 16:16:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,649 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 16:16:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:44,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,650 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:16:44,651 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 16:16:44,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 16:16:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 16:16:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 16:16:44,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 16:16:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,654 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 16:16:44,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 16:16:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,655 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:44,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:16:44,863 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 16:16:44,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:44,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341124005] [2020-09-11 16:16:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341124005] [2020-09-11 16:16:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116364425] [2020-09-11 16:16:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:45,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:45,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:45,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608795902] [2020-09-11 16:16:45,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:45,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:45,116 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 16:16:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:45,360 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 16:16:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:45,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:45,361 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:16:45,361 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 16:16:45,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 16:16:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 16:16:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 16:16:45,364 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 16:16:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:45,365 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 16:16:45,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 16:16:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:45,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:45,365 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:45,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:16:45,574 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 16:16:45,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:45,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950536058] [2020-09-11 16:16:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950536058] [2020-09-11 16:16:45,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330608543] [2020-09-11 16:16:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:45,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133908990] [2020-09-11 16:16:45,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:45,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:45,811 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 16:16:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:46,103 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 16:16:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:46,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:46,105 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:46,105 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:46,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 16:16:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 16:16:46,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 16:16:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:46,109 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 16:16:46,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 16:16:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:46,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:46,110 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:46,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:16:46,319 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 16:16:46,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:46,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333879254] [2020-09-11 16:16:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333879254] [2020-09-11 16:16:46,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320082424] [2020-09-11 16:16:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:46,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:46,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:46,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:46,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:46,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:46,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957181762] [2020-09-11 16:16:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:46,528 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 16:16:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:46,877 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 16:16:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:46,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:46,883 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:46,883 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:46,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 16:16:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 16:16:46,885 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 16:16:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:46,886 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 16:16:46,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 16:16:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:46,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:47,095 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 16:16:47,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482985159] [2020-09-11 16:16:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482985159] [2020-09-11 16:16:47,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537659505] [2020-09-11 16:16:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:47,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:47,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:47,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814526986] [2020-09-11 16:16:47,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:47,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:47,321 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 16:16:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:47,669 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 16:16:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:47,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:47,670 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:47,670 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:47,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 16:16:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:47,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 16:16:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:47,674 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:47,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:47,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:47,675 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:47,885 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 16:16:47,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599923546] [2020-09-11 16:16:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599923546] [2020-09-11 16:16:48,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649444650] [2020-09-11 16:16:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:48,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673442990] [2020-09-11 16:16:48,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:48,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:48,119 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 16:16:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:48,521 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 16:16:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:48,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:48,522 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:16:48,522 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:16:48,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:16:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 16:16:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:48,526 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 16:16:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:48,526 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:48,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:48,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:48,527 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:48,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 16:16:48,728 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 16:16:48,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:48,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117370195] [2020-09-11 16:16:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117370195] [2020-09-11 16:16:48,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084312611] [2020-09-11 16:16:48,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:48,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:48,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:48,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860674323] [2020-09-11 16:16:48,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:48,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:48,915 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 16:16:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:49,299 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 16:16:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:49,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:49,301 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:49,301 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:49,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 16:16:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:16:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 16:16:49,305 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 16:16:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:49,306 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 16:16:49,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 16:16:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:49,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:49,306 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:49,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:49,515 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 16:16:49,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:49,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179706806] [2020-09-11 16:16:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179706806] [2020-09-11 16:16:49,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510376285] [2020-09-11 16:16:49,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:49,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:49,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:49,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:49,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138862206] [2020-09-11 16:16:49,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:49,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:49,749 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 16:16:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:50,289 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 16:16:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:50,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:50,291 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:50,291 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:50,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 16:16:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:50,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 16:16:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:50,294 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:50,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:50,295 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:50,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:16:50,496 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 16:16:50,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:50,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994636988] [2020-09-11 16:16:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994636988] [2020-09-11 16:16:50,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698732749] [2020-09-11 16:16:50,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:50,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268527940] [2020-09-11 16:16:50,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:50,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:50,694 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 16:16:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:51,155 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:16:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:51,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:51,157 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:16:51,157 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:16:51,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:16:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 16:16:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 16:16:51,160 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 16:16:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:51,161 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 16:16:51,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 16:16:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:51,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:51,161 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:51,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 16:16:51,368 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 16:16:51,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:51,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85535860] [2020-09-11 16:16:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85535860] [2020-09-11 16:16:51,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574954419] [2020-09-11 16:16:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:51,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:51,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:51,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:51,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929088946] [2020-09-11 16:16:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:51,604 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 16:16:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:52,163 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 16:16:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:52,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:52,165 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:16:52,165 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:52,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 16:16:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:16:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 16:16:52,168 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 16:16:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:52,168 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 16:16:52,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 16:16:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:52,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:52,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:52,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:16:52,370 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 16:16:52,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:52,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387813254] [2020-09-11 16:16:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387813254] [2020-09-11 16:16:52,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143580204] [2020-09-11 16:16:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:52,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:52,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:52,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:52,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690276222] [2020-09-11 16:16:52,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:52,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:52,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:52,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:52,602 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 16:16:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:52,860 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:16:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:52,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:52,861 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:16:52,861 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:16:52,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:16:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 16:16:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:52,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:52,864 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:52,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:52,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:52,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:53,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:16:53,072 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:53,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 16:16:53,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:53,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519538246] [2020-09-11 16:16:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519538246] [2020-09-11 16:16:53,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110241213] [2020-09-11 16:16:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:53,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:53,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:53,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:53,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:53,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618796806] [2020-09-11 16:16:53,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:53,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:53,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:53,326 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:53,686 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 16:16:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:53,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:53,688 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:16:53,688 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:16:53,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:16:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:16:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:53,692 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:53,692 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:53,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:53,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:53,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:53,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:16:53,904 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 16:16:53,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:53,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519154273] [2020-09-11 16:16:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519154273] [2020-09-11 16:16:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563269786] [2020-09-11 16:16:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:54,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:54,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:54,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:54,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107400789] [2020-09-11 16:16:54,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:54,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:54,158 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:54,481 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:54,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:54,483 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:54,483 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:54,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 16:16:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:54,486 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:54,487 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:54,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:54,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:54,488 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:54,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:54,696 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 16:16:54,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:54,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118664469] [2020-09-11 16:16:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118664469] [2020-09-11 16:16:54,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986550681] [2020-09-11 16:16:54,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:54,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:54,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:54,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:54,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:54,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305542131] [2020-09-11 16:16:54,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:54,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:54,947 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:55,397 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 16:16:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:55,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:55,399 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:55,399 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:55,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 16:16:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:55,402 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:55,403 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:55,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:55,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:55,403 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:55,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:55,612 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 16:16:55,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:55,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516196401] [2020-09-11 16:16:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516196401] [2020-09-11 16:16:55,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795404602] [2020-09-11 16:16:55,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:55,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:55,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705434575] [2020-09-11 16:16:55,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:55,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:55,833 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:56,229 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 16:16:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:56,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:56,231 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:56,231 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:56,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 16:16:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:56,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:56,233 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:56,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:56,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:56,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:56,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 16:16:56,436 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 16:16:56,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:56,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951813148] [2020-09-11 16:16:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951813148] [2020-09-11 16:16:56,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965952901] [2020-09-11 16:16:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:56,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:56,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:56,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:56,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:56,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834472928] [2020-09-11 16:16:56,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:56,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:56,688 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:57,180 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:57,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:57,182 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:57,182 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:57,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 16:16:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:57,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:57,186 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:57,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:57,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:57,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:57,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:57,388 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 16:16:57,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:57,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769133818] [2020-09-11 16:16:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769133818] [2020-09-11 16:16:57,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082699225] [2020-09-11 16:16:57,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:57,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:57,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:57,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325689132] [2020-09-11 16:16:57,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:57,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:57,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:57,589 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:58,038 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 16:16:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:58,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:58,039 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:16:58,040 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:16:58,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:16:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 16:16:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:58,042 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:58,043 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:58,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:58,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:58,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:58,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:16:58,244 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 16:16:58,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:58,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627025781] [2020-09-11 16:16:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627025781] [2020-09-11 16:16:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934250777] [2020-09-11 16:16:58,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:58,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:58,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:58,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:58,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:58,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691533334] [2020-09-11 16:16:58,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:58,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:58,485 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:59,096 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 16:16:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:59,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:59,098 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:59,098 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:59,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:16:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 16:16:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:59,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:59,102 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:59,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:59,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:59,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:59,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:59,304 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 16:16:59,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:59,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262523711] [2020-09-11 16:16:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262523711] [2020-09-11 16:16:59,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837537997] [2020-09-11 16:16:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:16:59,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:59,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:59,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871028885] [2020-09-11 16:16:59,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:59,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:59,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:59,520 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:17:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:00,004 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:17:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:00,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:17:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:00,005 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:00,006 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:00,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 16:17:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:17:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 16:17:00,008 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 16:17:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:00,008 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 16:17:00,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:17:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 16:17:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:17:00,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:00,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:00,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:17:00,210 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 16:17:00,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:00,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447689170] [2020-09-11 16:17:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447689170] [2020-09-11 16:17:00,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60287220] [2020-09-11 16:17:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:00,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:17:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:00,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:17:00,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716028249] [2020-09-11 16:17:00,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:00,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:00,443 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 16:17:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:01,034 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-09-11 16:17:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:01,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:17:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:01,035 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:17:01,036 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 16:17:01,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 16:17:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-09-11 16:17:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:17:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 16:17:01,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 16:17:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:01,040 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 16:17:01,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 16:17:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:17:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:01,040 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:01,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,250 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 16:17:01,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:01,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912979600] [2020-09-11 16:17:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912979600] [2020-09-11 16:17:01,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619059437] [2020-09-11 16:17:01,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:17:01,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763991465] [2020-09-11 16:17:01,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:01,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:01,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:01,477 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 16:17:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:02,085 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 16:17:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:02,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:17:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:02,086 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:17:02,086 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:17:02,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:17:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 16:17:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:17:02,089 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 16:17:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:02,089 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:17:02,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:17:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:02,090 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:02,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:17:02,291 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 16:17:02,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:02,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300777774] [2020-09-11 16:17:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300777774] [2020-09-11 16:17:02,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75821424] [2020-09-11 16:17:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:02,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:02,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:02,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:02,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015256931] [2020-09-11 16:17:02,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:02,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:02,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:02,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:02,525 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 16:17:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:03,196 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 16:17:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:03,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:03,197 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:17:03,197 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:17:03,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:17:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 16:17:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:17:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 16:17:03,201 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 16:17:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,201 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 16:17:03,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 16:17:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,202 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:03,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 16:17:03,410 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 16:17:03,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:03,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599597028] [2020-09-11 16:17:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599597028] [2020-09-11 16:17:03,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812687074] [2020-09-11 16:17:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:03,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:03,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:03,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:03,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986590601] [2020-09-11 16:17:03,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:03,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:03,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:03,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:03,689 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 16:17:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:03,981 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 16:17:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:17:03,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:03,983 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:03,984 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:17:03,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:17:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:17:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 16:17:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 16:17:03,991 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 16:17:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,991 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 16:17:03,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 16:17:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,992 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:04,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:04,200 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 16:17:04,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:04,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482093131] [2020-09-11 16:17:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482093131] [2020-09-11 16:17:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180660728] [2020-09-11 16:17:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:04,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:04,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:04,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:04,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902787653] [2020-09-11 16:17:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:04,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:04,506 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 16:17:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,847 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 16:17:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:17:04,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,848 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:04,849 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:04,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:17:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 16:17:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:17:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 16:17:04,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 16:17:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,852 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 16:17:04,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 16:17:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,853 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:05,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:05,054 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 16:17:05,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:05,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441846741] [2020-09-11 16:17:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441846741] [2020-09-11 16:17:05,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209158225] [2020-09-11 16:17:05,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:05,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:05,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:05,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:05,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444851923] [2020-09-11 16:17:05,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:05,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:05,303 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 16:17:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:05,710 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 16:17:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:05,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:05,712 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:17:05,712 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:05,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 16:17:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:17:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 16:17:05,714 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 16:17:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:05,715 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 16:17:05,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 16:17:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:05,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:05,716 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:05,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:05,924 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 16:17:05,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:05,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402518478] [2020-09-11 16:17:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402518478] [2020-09-11 16:17:06,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351265558] [2020-09-11 16:17:06,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:06,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:06,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:06,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:06,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875197386] [2020-09-11 16:17:06,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:06,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:06,192 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 16:17:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:06,614 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 16:17:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:06,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:06,616 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:06,616 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:06,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 16:17:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 16:17:06,620 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 16:17:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:06,621 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 16:17:06,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 16:17:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:06,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:06,622 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:06,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:06,834 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 16:17:06,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:06,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534304045] [2020-09-11 16:17:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534304045] [2020-09-11 16:17:07,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874090522] [2020-09-11 16:17:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:07,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:07,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:07,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247969505] [2020-09-11 16:17:07,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:07,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:07,136 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 16:17:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:07,654 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:07,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:07,656 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:07,656 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:07,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 16:17:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:17:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 16:17:07,665 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 16:17:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:07,665 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 16:17:07,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 16:17:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:07,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:07,667 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:07,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:17:07,877 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:07,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 16:17:07,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:07,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539353415] [2020-09-11 16:17:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539353415] [2020-09-11 16:17:08,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502000487] [2020-09-11 16:17:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:08,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:08,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:08,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:08,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715544657] [2020-09-11 16:17:08,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:08,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:08,161 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 16:17:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:08,706 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 16:17:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:08,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:08,708 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:08,709 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:08,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 16:17:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 16:17:08,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 16:17:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:08,713 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 16:17:08,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 16:17:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:08,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:08,713 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:08,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:08,914 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 16:17:08,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:08,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377614041] [2020-09-11 16:17:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377614041] [2020-09-11 16:17:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213570301] [2020-09-11 16:17:09,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:09,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:09,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:09,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617944177] [2020-09-11 16:17:09,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:09,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:09,130 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 16:17:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:09,640 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 16:17:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:09,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:09,642 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:09,642 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:09,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 16:17:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:17:09,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 16:17:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:09,646 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:17:09,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:17:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:09,646 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:09,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:17:09,847 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 16:17:09,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:09,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129625508] [2020-09-11 16:17:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129625508] [2020-09-11 16:17:09,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551164953] [2020-09-11 16:17:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:10,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:10,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:10,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:10,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:10,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168441486] [2020-09-11 16:17:10,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:10,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:10,091 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 16:17:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:10,643 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:17:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:10,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:10,645 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:10,645 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:10,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 16:17:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:17:10,648 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 16:17:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:10,649 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:17:10,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:17:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:10,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:10,650 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:10,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:10,851 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 16:17:10,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:10,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657920862] [2020-09-11 16:17:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657920862] [2020-09-11 16:17:11,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477695957] [2020-09-11 16:17:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:11,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:11,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:11,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908024354] [2020-09-11 16:17:11,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:11,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:11,088 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 16:17:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:11,634 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 16:17:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:11,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:11,636 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:11,636 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:11,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 16:17:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 16:17:11,640 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 16:17:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:11,640 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 16:17:11,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 16:17:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:11,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:11,641 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:11,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:17:11,850 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 16:17:11,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:11,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425609183] [2020-09-11 16:17:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425609183] [2020-09-11 16:17:12,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240899357] [2020-09-11 16:17:12,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:12,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:12,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:12,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:12,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212241945] [2020-09-11 16:17:12,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:12,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:12,123 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 16:17:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:12,812 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 16:17:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:12,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:12,814 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:12,814 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:12,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 16:17:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:17:12,817 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 16:17:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:12,818 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:17:12,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:17:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:12,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:12,818 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:13,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:13,019 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 16:17:13,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:13,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842845039] [2020-09-11 16:17:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842845039] [2020-09-11 16:17:13,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237756225] [2020-09-11 16:17:13,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:13,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:13,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954652633] [2020-09-11 16:17:13,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:13,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:13,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:13,260 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 16:17:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:13,824 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 16:17:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:13,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:13,825 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:17:13,826 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:17:13,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:17:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 16:17:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 16:17:13,829 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 16:17:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:13,830 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 16:17:13,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 16:17:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:13,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:13,830 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:14,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:14,040 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 16:17:14,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:14,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240537925] [2020-09-11 16:17:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240537925] [2020-09-11 16:17:14,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992187190] [2020-09-11 16:17:14,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:14,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:14,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:14,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:14,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:14,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845471653] [2020-09-11 16:17:14,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:14,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:14,294 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 16:17:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:14,960 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 16:17:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:14,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:14,962 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:14,962 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:14,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 16:17:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 16:17:14,965 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 16:17:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 16:17:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 16:17:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:14,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:14,966 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:15,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:15,167 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 16:17:15,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:15,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872005527] [2020-09-11 16:17:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872005527] [2020-09-11 16:17:15,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626217170] [2020-09-11 16:17:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:15,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:15,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:15,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:15,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355050172] [2020-09-11 16:17:15,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:15,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:15,475 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 16:17:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:15,837 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 16:17:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:15,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:15,839 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:15,840 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:15,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 16:17:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:15,843 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:15,843 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:15,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:15,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:15,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:16,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:16,053 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 16:17:16,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:16,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616754861] [2020-09-11 16:17:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:16,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616754861] [2020-09-11 16:17:16,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693400414] [2020-09-11 16:17:16,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:16,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:16,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:16,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:16,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:16,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734557157] [2020-09-11 16:17:16,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:16,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:16,362 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:16,769 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 16:17:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:16,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:16,771 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:16,771 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:16,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 16:17:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:16,774 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:16,774 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:16,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:16,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:16,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:16,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:16,984 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 16:17:16,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:16,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895634262] [2020-09-11 16:17:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895634262] [2020-09-11 16:17:17,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983549849] [2020-09-11 16:17:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:17,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:17,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:17,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:17,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923558094] [2020-09-11 16:17:17,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:17,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:17,267 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:17,690 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 16:17:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:17,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:17,692 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:17,692 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:17,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 16:17:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:17,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:17,696 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:17,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:17,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:17,697 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:17,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:17,906 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 16:17:17,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:17,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94310823] [2020-09-11 16:17:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94310823] [2020-09-11 16:17:18,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770358454] [2020-09-11 16:17:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:18,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:18,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:18,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:18,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:18,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:18,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:18,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525808351] [2020-09-11 16:17:18,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:18,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:18,219 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:18,753 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 16:17:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:18,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:18,754 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:18,755 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:18,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 16:17:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:18,758 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:18,758 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:18,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:18,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:18,759 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:18,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:18,963 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 16:17:18,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:18,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785420563] [2020-09-11 16:17:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785420563] [2020-09-11 16:17:19,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753171075] [2020-09-11 16:17:19,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:19,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:19,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250900916] [2020-09-11 16:17:19,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:19,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:19,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:19,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:19,249 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:19,713 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 16:17:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:19,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:19,715 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:19,715 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:19,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 16:17:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:19,718 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:19,718 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:19,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:19,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:19,719 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:19,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 16:17:19,920 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 16:17:19,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:19,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579925966] [2020-09-11 16:17:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579925966] [2020-09-11 16:17:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262624827] [2020-09-11 16:17:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:20,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:20,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:20,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:20,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:20,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216870619] [2020-09-11 16:17:20,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:20,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:20,220 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:20,854 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 16:17:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:20,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:20,856 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:20,856 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:20,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 16:17:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:20,859 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:20,859 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:20,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:20,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:21,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:21,061 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 16:17:21,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:21,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434604479] [2020-09-11 16:17:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434604479] [2020-09-11 16:17:21,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78826411] [2020-09-11 16:17:21,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:21,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:21,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:21,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:21,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304145191] [2020-09-11 16:17:21,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:21,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:21,324 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:21,858 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 16:17:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:21,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:21,860 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:21,860 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:21,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 16:17:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:21,864 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:21,864 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:21,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:21,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:21,865 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:22,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:17:22,071 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 16:17:22,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:22,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997496975] [2020-09-11 16:17:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997496975] [2020-09-11 16:17:22,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224246160] [2020-09-11 16:17:22,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:22,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:22,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:22,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:22,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849876994] [2020-09-11 16:17:22,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:22,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:22,356 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:23,065 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:17:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:23,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:23,066 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:17:23,067 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:17:23,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:17:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 16:17:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:23,069 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:23,069 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:23,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:23,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:23,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:23,271 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 16:17:23,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:23,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433982404] [2020-09-11 16:17:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:23,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433982404] [2020-09-11 16:17:23,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422591768] [2020-09-11 16:17:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:23,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:23,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:23,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:23,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:23,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295065411] [2020-09-11 16:17:23,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:23,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:23,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:23,528 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:24,129 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 16:17:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:24,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:24,131 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:17:24,131 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:17:24,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:17:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 16:17:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:24,134 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:24,134 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:24,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:24,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:24,135 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:24,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:24,345 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 16:17:24,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:24,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540078696] [2020-09-11 16:17:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540078696] [2020-09-11 16:17:24,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271412142] [2020-09-11 16:17:24,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:24,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:24,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:24,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:24,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828422795] [2020-09-11 16:17:24,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:24,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:24,639 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:25,467 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 16:17:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:25,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:25,469 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:17:25,469 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:17:25,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:17:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 16:17:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:25,472 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:25,472 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:25,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:25,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:25,472 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:25,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:25,673 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 16:17:25,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:25,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636055711] [2020-09-11 16:17:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636055711] [2020-09-11 16:17:25,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953268417] [2020-09-11 16:17:25,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:25,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:25,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981499177] [2020-09-11 16:17:25,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:25,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:25,924 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:26,572 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:17:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:26,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:26,574 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:26,574 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:26,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 16:17:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:17:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 16:17:26,577 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 16:17:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:26,577 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 16:17:26,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 16:17:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:26,578 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:26,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:26,779 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 16:17:26,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:26,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123825428] [2020-09-11 16:17:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123825428] [2020-09-11 16:17:26,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771108448] [2020-09-11 16:17:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:27,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:27,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:27,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:27,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:27,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:27,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081377856] [2020-09-11 16:17:27,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:27,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:27,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:27,055 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 16:17:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:27,905 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-11 16:17:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:27,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:27,907 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:17:27,907 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:17:27,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:17:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-11 16:17:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:17:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 16:17:27,910 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 16:17:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:27,910 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 16:17:27,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 16:17:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:27,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:27,913 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:28,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:28,121 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 16:17:28,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:28,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484952389] [2020-09-11 16:17:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:28,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484952389] [2020-09-11 16:17:28,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729010215] [2020-09-11 16:17:28,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:28,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:28,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:28,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:28,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:28,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680382979] [2020-09-11 16:17:28,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:28,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:28,401 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 16:17:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:29,175 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:29,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:29,177 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:29,177 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:29,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 16:17:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:29,181 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 16:17:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:29,182 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:29,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:29,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:29,183 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:29,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:29,385 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 16:17:29,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:29,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996954470] [2020-09-11 16:17:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996954470] [2020-09-11 16:17:29,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910913839] [2020-09-11 16:17:29,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:29,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:29,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:29,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:29,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293457995] [2020-09-11 16:17:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:29,689 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 16:17:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:30,544 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 16:17:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:30,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:30,546 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:30,546 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:17:30,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:17:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 16:17:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:17:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 16:17:30,548 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 16:17:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:30,548 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 16:17:30,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 16:17:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:30,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:30,549 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:30,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 16:17:30,750 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 16:17:30,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:30,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714392229] [2020-09-11 16:17:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714392229] [2020-09-11 16:17:31,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250727416] [2020-09-11 16:17:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:31,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:31,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:31,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:31,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710171467] [2020-09-11 16:17:31,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:31,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:31,077 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 16:17:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:31,464 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:17:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:31,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:31,466 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:17:31,466 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:17:31,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:17:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:17:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 16:17:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 16:17:31,469 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 16:17:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:31,469 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 16:17:31,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 16:17:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:31,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:31,470 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:31,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:31,671 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 16:17:31,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:31,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38601718] [2020-09-11 16:17:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38601718] [2020-09-11 16:17:31,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412145179] [2020-09-11 16:17:31,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:31,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:32,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:32,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:32,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40919788] [2020-09-11 16:17:32,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:32,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:32,034 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 16:17:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:32,476 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 16:17:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:32,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:32,478 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:32,478 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:32,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 16:17:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 16:17:32,480 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 16:17:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:32,481 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 16:17:32,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 16:17:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:32,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:32,481 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:32,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:17:32,682 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 16:17:32,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:32,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701279368] [2020-09-11 16:17:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701279368] [2020-09-11 16:17:32,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522662552] [2020-09-11 16:17:32,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:32,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:32,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239158357] [2020-09-11 16:17:32,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:32,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:32,992 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 16:17:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:33,462 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:33,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:33,464 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:33,465 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:33,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 16:17:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 16:17:33,468 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 16:17:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:33,469 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 16:17:33,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 16:17:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:33,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:33,470 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:33,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:33,681 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 16:17:33,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:33,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495069699] [2020-09-11 16:17:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495069699] [2020-09-11 16:17:33,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270466164] [2020-09-11 16:17:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:34,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:34,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:34,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:34,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879066021] [2020-09-11 16:17:34,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:34,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:34,056 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 16:17:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:34,529 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 16:17:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:34,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:34,530 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:34,530 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:34,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 16:17:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 16:17:34,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 16:17:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:34,536 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 16:17:34,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 16:17:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:34,537 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:34,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:34,744 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 16:17:34,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:34,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777672783] [2020-09-11 16:17:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777672783] [2020-09-11 16:17:34,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533390389] [2020-09-11 16:17:34,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:35,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:35,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:35,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411806097] [2020-09-11 16:17:35,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:35,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:35,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:35,047 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 16:17:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:35,543 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 16:17:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:35,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:35,545 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:35,545 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:35,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 16:17:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 16:17:35,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 16:17:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:35,549 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 16:17:35,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 16:17:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:35,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:35,550 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:35,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 16:17:35,754 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 16:17:35,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:35,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068769423] [2020-09-11 16:17:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068769423] [2020-09-11 16:17:35,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671664265] [2020-09-11 16:17:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:36,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:36,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:36,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:36,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715448213] [2020-09-11 16:17:36,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:36,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:36,086 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 16:17:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:36,686 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 16:17:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:36,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:36,688 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:17:36,688 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:17:36,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:17:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:17:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 16:17:36,691 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 16:17:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:36,691 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 16:17:36,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 16:17:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:36,692 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:36,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:17:36,899 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 16:17:36,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:36,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873108658] [2020-09-11 16:17:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:37,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873108658] [2020-09-11 16:17:37,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154014740] [2020-09-11 16:17:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:37,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:37,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:37,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:37,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168940830] [2020-09-11 16:17:37,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:37,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:37,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:37,197 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 16:17:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:37,761 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 16:17:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:37,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:37,763 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:37,763 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:37,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:17:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 16:17:37,766 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 16:17:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:37,766 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 16:17:37,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 16:17:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:37,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:37,767 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:37,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:37,969 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 16:17:37,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26144792] [2020-09-11 16:17:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26144792] [2020-09-11 16:17:38,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423098008] [2020-09-11 16:17:38,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:38,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:38,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:38,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:38,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:38,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630825583] [2020-09-11 16:17:38,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:38,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:38,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:38,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:38,290 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 16:17:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:38,983 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 16:17:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:38,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:38,985 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:38,985 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:38,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 16:17:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:17:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 16:17:38,988 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 16:17:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:38,989 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 16:17:38,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 16:17:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:38,989 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:39,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:17:39,198 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 16:17:39,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:39,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191666378] [2020-09-11 16:17:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191666378] [2020-09-11 16:17:39,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745782842] [2020-09-11 16:17:39,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:39,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:39,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:39,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796499514] [2020-09-11 16:17:39,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:39,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:39,460 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 16:17:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:40,095 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 16:17:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:40,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:40,097 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:17:40,097 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:17:40,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:17:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 16:17:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:40,101 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 16:17:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:40,101 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:40,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:40,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:40,102 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:40,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:40,311 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 16:17:40,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:40,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417314131] [2020-09-11 16:17:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417314131] [2020-09-11 16:17:40,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845187958] [2020-09-11 16:17:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:40,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:40,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:40,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:40,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:40,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594968938] [2020-09-11 16:17:40,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:40,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:40,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:40,621 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 16:17:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:41,444 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 16:17:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:41,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:41,446 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:17:41,446 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:17:41,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:17:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 16:17:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:41,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 16:17:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:41,449 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:41,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:41,450 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:41,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:17:41,651 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 16:17:41,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:41,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32431713] [2020-09-11 16:17:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32431713] [2020-09-11 16:17:41,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33875113] [2020-09-11 16:17:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:41,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:41,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:41,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:41,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:41,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282111149] [2020-09-11 16:17:41,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:41,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:41,934 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 16:17:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:42,655 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 16:17:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:42,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:42,657 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:42,658 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:42,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 16:17:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:17:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 16:17:42,660 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 16:17:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:42,660 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 16:17:42,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 16:17:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:42,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:42,661 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:42,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:42,862 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 16:17:42,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:42,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54145568] [2020-09-11 16:17:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54145568] [2020-09-11 16:17:43,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469744008] [2020-09-11 16:17:43,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:43,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:43,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:43,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:43,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:43,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476595148] [2020-09-11 16:17:43,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:43,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:43,154 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 16:17:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:44,026 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 16:17:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:44,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:44,027 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:44,027 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:44,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 16:17:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:44,030 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 16:17:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:44,030 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:44,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:44,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:44,031 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:44,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:17:44,238 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 16:17:44,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:44,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623911925] [2020-09-11 16:17:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623911925] [2020-09-11 16:17:44,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793649489] [2020-09-11 16:17:44,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:44,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:44,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:44,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:44,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638643628] [2020-09-11 16:17:44,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:44,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:44,543 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 16:17:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:45,264 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:17:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:17:45,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:45,265 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:17:45,265 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:17:45,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:17:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 16:17:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:17:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 16:17:45,269 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 16:17:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:45,270 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 16:17:45,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 16:17:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:45,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:45,271 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:45,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 16:17:45,481 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 16:17:45,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:45,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268495524] [2020-09-11 16:17:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268495524] [2020-09-11 16:17:45,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886191102] [2020-09-11 16:17:45,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:45,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:45,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:45,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:45,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283539135] [2020-09-11 16:17:45,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:45,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:45,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:45,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:45,776 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 16:17:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:46,687 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 16:17:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:17:46,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:46,688 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:46,688 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:46,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:17:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 16:17:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:17:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 16:17:46,691 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 16:17:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:46,691 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 16:17:46,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 16:17:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:46,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:46,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:46,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:46,893 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 16:17:46,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:46,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011324472] [2020-09-11 16:17:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011324472] [2020-09-11 16:17:47,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282303679] [2020-09-11 16:17:47,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:47,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:47,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:47,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957352233] [2020-09-11 16:17:47,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:47,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:47,247 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 16:17:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:47,686 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 16:17:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:47,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:47,687 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:17:47,687 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:17:47,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:17:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 16:17:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:47,690 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:47,690 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:47,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:47,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:47,691 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:47,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:47,894 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 16:17:47,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:47,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864235006] [2020-09-11 16:17:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864235006] [2020-09-11 16:17:48,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491415153] [2020-09-11 16:17:48,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:48,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:48,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:48,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:48,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:48,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987173056] [2020-09-11 16:17:48,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:48,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:48,265 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:48,809 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 16:17:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:48,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:48,810 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:17:48,811 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:17:48,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:17:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 16:17:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:48,814 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:48,814 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:48,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:48,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:48,815 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:49,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:17:49,016 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 16:17:49,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:49,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308585006] [2020-09-11 16:17:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308585006] [2020-09-11 16:17:49,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004533621] [2020-09-11 16:17:49,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:49,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:49,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:49,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433582512] [2020-09-11 16:17:49,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:49,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:49,323 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:49,830 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:17:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:49,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:49,832 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:17:49,832 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:17:49,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:17:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 16:17:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:49,834 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:49,835 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:49,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:49,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:49,836 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:50,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:50,045 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 16:17:50,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:50,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887198412] [2020-09-11 16:17:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887198412] [2020-09-11 16:17:50,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636557653] [2020-09-11 16:17:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:50,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:50,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:50,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:50,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327408292] [2020-09-11 16:17:50,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:50,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:50,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:50,417 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:51,050 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 16:17:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:51,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:51,052 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:51,052 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:51,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 16:17:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:51,055 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:51,055 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:51,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:51,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:51,056 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:51,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:17:51,256 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 16:17:51,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:51,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566409860] [2020-09-11 16:17:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566409860] [2020-09-11 16:17:51,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773822322] [2020-09-11 16:17:51,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:51,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:51,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:51,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:51,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577335565] [2020-09-11 16:17:51,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:51,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:51,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:51,579 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:52,146 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:17:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:52,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:52,148 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:52,148 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:52,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 16:17:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:52,151 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:52,151 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:52,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:52,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:52,152 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:52,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:17:52,360 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 16:17:52,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:52,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570814691] [2020-09-11 16:17:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570814691] [2020-09-11 16:17:52,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615181430] [2020-09-11 16:17:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:52,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:52,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:52,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:52,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16753928] [2020-09-11 16:17:52,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:52,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:52,725 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:53,448 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:17:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:53,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:53,450 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:53,450 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:53,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 16:17:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:53,453 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:53,453 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:53,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:53,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:53,454 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:53,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:17:53,659 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:53,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 16:17:53,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:53,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979662420] [2020-09-11 16:17:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979662420] [2020-09-11 16:17:53,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611437509] [2020-09-11 16:17:53,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:53,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:53,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357886821] [2020-09-11 16:17:53,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:53,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:53,968 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:54,603 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 16:17:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:54,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:54,604 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:54,604 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:54,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 16:17:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:54,607 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:54,607 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:54,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:54,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:54,608 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:54,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:54,815 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 16:17:54,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:54,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249605322] [2020-09-11 16:17:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249605322] [2020-09-11 16:17:55,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570647050] [2020-09-11 16:17:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:55,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:55,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:55,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:55,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472535611] [2020-09-11 16:17:55,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:55,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:55,129 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:55,938 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 16:17:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:55,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:55,939 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:55,939 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:55,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 16:17:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:55,942 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:55,942 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:55,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:55,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:55,943 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:56,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:17:56,144 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 16:17:56,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:56,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760946103] [2020-09-11 16:17:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760946103] [2020-09-11 16:17:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070367568] [2020-09-11 16:17:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:56,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:56,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:56,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803066954] [2020-09-11 16:17:56,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:56,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:56,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:56,458 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:57,194 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 16:17:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:57,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:57,195 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:57,195 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:57,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 16:17:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:57,199 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:57,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:57,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:57,199 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:57,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:57,403 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 16:17:57,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:57,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312524746] [2020-09-11 16:17:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312524746] [2020-09-11 16:17:57,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218498525] [2020-09-11 16:17:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:57,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:57,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:57,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:57,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660660725] [2020-09-11 16:17:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:57,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:57,746 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:58,660 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:17:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:58,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:58,661 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:58,661 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:58,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 16:17:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:58,664 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:58,664 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:58,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:58,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:58,665 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:58,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:58,866 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 16:17:58,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:58,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75116178] [2020-09-11 16:17:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75116178] [2020-09-11 16:17:59,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435269226] [2020-09-11 16:17:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:17:59,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:59,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:59,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:59,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569883105] [2020-09-11 16:17:59,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:59,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:59,132 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:59,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:59,869 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:59,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:59,871 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:59,871 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:59,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 16:17:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:59,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:59,876 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:59,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:59,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:59,877 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:00,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:00,085 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 16:18:00,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:00,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3227932] [2020-09-11 16:18:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3227932] [2020-09-11 16:18:00,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453982412] [2020-09-11 16:18:00,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:00,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:18:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:00,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:00,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:00,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235080387] [2020-09-11 16:18:00,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:00,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:00,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:00,418 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:18:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:01,432 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 16:18:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:01,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:01,434 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:18:01,434 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:01,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 16:18:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:01,436 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:18:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:01,437 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:01,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:01,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:01,437 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:01,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:01,638 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 16:18:01,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:01,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352774350] [2020-09-11 16:18:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352774350] [2020-09-11 16:18:01,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733437871] [2020-09-11 16:18:01,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:01,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:18:01,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797913856] [2020-09-11 16:18:01,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:18:01,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:18:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:18:01,956 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:18:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:02,756 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:18:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:02,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:18:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:02,757 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:02,757 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:02,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 16:18:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:18:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 16:18:02,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 16:18:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:02,761 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 16:18:02,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:18:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 16:18:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:02,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:02,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:02,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 16:18:02,966 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 16:18:02,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:02,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454727240] [2020-09-11 16:18:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454727240] [2020-09-11 16:18:03,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836392634] [2020-09-11 16:18:03,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:03,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:03,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:03,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:03,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663013523] [2020-09-11 16:18:03,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:03,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:03,283 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 16:18:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:04,239 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-09-11 16:18:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:04,240 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:04,240 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:18:04,241 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:18:04,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:18:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 16:18:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:18:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 16:18:04,244 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 16:18:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:04,244 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 16:18:04,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 16:18:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:04,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:04,245 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:04,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:18:04,454 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 16:18:04,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:04,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665070343] [2020-09-11 16:18:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665070343] [2020-09-11 16:18:04,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567636021] [2020-09-11 16:18:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:04,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:18:04,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:04,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:04,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:04,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590987078] [2020-09-11 16:18:04,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:04,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:04,776 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 16:18:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:05,764 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 16:18:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:05,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:05,766 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:18:05,766 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:05,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 16:18:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:05,768 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 16:18:05,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:05,768 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:05,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:05,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:05,769 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:05,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:18:05,971 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 16:18:05,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:05,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085537097] [2020-09-11 16:18:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085537097] [2020-09-11 16:18:06,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389396347] [2020-09-11 16:18:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:06,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:06,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:06,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:06,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479618316] [2020-09-11 16:18:06,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:06,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:06,286 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 16:18:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:07,358 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 16:18:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:07,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:07,360 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:18:07,360 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:18:07,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:18:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 16:18:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:18:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 16:18:07,363 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 16:18:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:07,363 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 16:18:07,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 16:18:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:07,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:07,364 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:07,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:18:07,566 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 16:18:07,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:07,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382956340] [2020-09-11 16:18:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382956340] [2020-09-11 16:18:07,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259034351] [2020-09-11 16:18:07,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:07,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:07,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:07,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458128617] [2020-09-11 16:18:07,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:07,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:07,940 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 16:18:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:08,352 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 16:18:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:18:08,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:08,354 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:08,354 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:18:08,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:18:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:18:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 16:18:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 16:18:08,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 16:18:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:08,356 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 16:18:08,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 16:18:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:08,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:08,358 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:08,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:08,561 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 16:18:08,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:08,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110276222] [2020-09-11 16:18:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110276222] [2020-09-11 16:18:08,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397884532] [2020-09-11 16:18:08,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:08,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:08,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:08,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:08,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:08,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775628145] [2020-09-11 16:18:08,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:08,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:08,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:08,974 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 16:18:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:09,505 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 16:18:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:18:09,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:09,507 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:09,507 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:09,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:18:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:18:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:18:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 16:18:09,510 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 16:18:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:09,510 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 16:18:09,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 16:18:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:09,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:09,511 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:09,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:18:09,714 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:09,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 16:18:09,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:09,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190261] [2020-09-11 16:18:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190261] [2020-09-11 16:18:10,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394175545] [2020-09-11 16:18:10,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:10,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:10,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010480868] [2020-09-11 16:18:10,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:10,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:10,083 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 16:18:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:10,659 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 16:18:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:10,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:10,660 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:10,660 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:10,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:18:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:18:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 16:18:10,663 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 16:18:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:10,664 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 16:18:10,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 16:18:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:10,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:10,665 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:10,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 16:18:10,872 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 16:18:10,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:10,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365350700] [2020-09-11 16:18:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365350700] [2020-09-11 16:18:11,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412052424] [2020-09-11 16:18:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:11,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:11,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:11,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:11,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:11,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:11,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84732573] [2020-09-11 16:18:11,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:11,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:11,278 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 16:18:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:11,886 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 16:18:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:11,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:11,887 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:11,887 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:11,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 16:18:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 16:18:11,890 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 16:18:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:11,890 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 16:18:11,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 16:18:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:11,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:11,891 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:12,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:18:12,092 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 16:18:12,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:12,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843136006] [2020-09-11 16:18:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843136006] [2020-09-11 16:18:12,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318379663] [2020-09-11 16:18:12,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:12,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:12,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317749755] [2020-09-11 16:18:12,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:12,462 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 16:18:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:13,103 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 16:18:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:13,104 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:13,104 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:13,104 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:13,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 16:18:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:18:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 16:18:13,107 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 16:18:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:13,107 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 16:18:13,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 16:18:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:13,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:13,107 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:13,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,309 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 16:18:13,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:13,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6845283] [2020-09-11 16:18:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6845283] [2020-09-11 16:18:13,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684418496] [2020-09-11 16:18:13,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:13,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:13,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:13,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:13,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146236619] [2020-09-11 16:18:13,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:13,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:13,685 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 16:18:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:14,421 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 16:18:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:14,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:14,422 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:18:14,422 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:18:14,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:18:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 16:18:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 16:18:14,424 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 16:18:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 16:18:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 16:18:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:14,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:14,425 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:14,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:14,626 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 16:18:14,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:14,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331891465] [2020-09-11 16:18:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:14,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331891465] [2020-09-11 16:18:14,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952526261] [2020-09-11 16:18:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:14,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:14,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:14,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:14,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350055907] [2020-09-11 16:18:14,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:14,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:14,984 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 16:18:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:15,709 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 16:18:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:15,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:15,711 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:15,711 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:15,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 16:18:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:18:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 16:18:15,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 16:18:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:15,715 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 16:18:15,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 16:18:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:15,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:15,716 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:15,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:15,917 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:15,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 16:18:15,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:15,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275647840] [2020-09-11 16:18:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275647840] [2020-09-11 16:18:16,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744114228] [2020-09-11 16:18:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:16,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:16,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:16,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:16,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393366759] [2020-09-11 16:18:16,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:16,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:16,255 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 16:18:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:17,050 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 16:18:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:17,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:17,051 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:17,052 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:17,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 16:18:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 16:18:17,054 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 16:18:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:17,055 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 16:18:17,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 16:18:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:17,055 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:17,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:18:17,263 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 16:18:17,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:17,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479160144] [2020-09-11 16:18:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479160144] [2020-09-11 16:18:17,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888704446] [2020-09-11 16:18:17,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:17,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:17,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382022659] [2020-09-11 16:18:17,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:17,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:17,603 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 16:18:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:18,359 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 16:18:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:18,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:18,361 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:18:18,361 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:18:18,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:18:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 16:18:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:18:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 16:18:18,364 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 16:18:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:18,364 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 16:18:18,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 16:18:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:18,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:18,365 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:18,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:18,575 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 16:18:18,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:18,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000945510] [2020-09-11 16:18:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:18,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000945510] [2020-09-11 16:18:18,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478795960] [2020-09-11 16:18:18,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:18,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:18,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:18,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:18,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:18,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:18,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924826270] [2020-09-11 16:18:18,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:18,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:18,933 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 16:18:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:19,853 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 16:18:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:19,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:19,854 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:18:19,854 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:18:19,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:18:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 16:18:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:18:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 16:18:19,858 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 16:18:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:19,858 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 16:18:19,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 16:18:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:19,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:19,859 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:20,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:18:20,063 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 16:18:20,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:20,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752710906] [2020-09-11 16:18:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752710906] [2020-09-11 16:18:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437789626] [2020-09-11 16:18:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:20,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:20,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:20,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:20,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726354474] [2020-09-11 16:18:20,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:20,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:20,405 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 16:18:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:21,245 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 16:18:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:21,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:21,246 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:21,247 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:21,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 16:18:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:18:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:18:21,250 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 16:18:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:21,250 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:18:21,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:18:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:21,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:21,250 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:21,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 16:18:21,451 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 16:18:21,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:21,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132557653] [2020-09-11 16:18:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:21,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132557653] [2020-09-11 16:18:21,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992123981] [2020-09-11 16:18:21,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:21,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:21,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:21,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:21,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:21,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:21,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536706533] [2020-09-11 16:18:21,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:21,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:21,806 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 16:18:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:22,818 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 16:18:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:22,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:22,819 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:22,819 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:22,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 16:18:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:22,822 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 16:18:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:22,822 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:22,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:22,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:22,823 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 16:18:23,024 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 16:18:23,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:23,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504583654] [2020-09-11 16:18:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:23,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504583654] [2020-09-11 16:18:23,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531183056] [2020-09-11 16:18:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:23,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:23,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:23,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:23,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:23,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115524156] [2020-09-11 16:18:23,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:23,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:23,356 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 16:18:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:24,264 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 16:18:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:24,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:24,266 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:18:24,266 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:18:24,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:18:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 16:18:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:18:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 16:18:24,269 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 16:18:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:24,269 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 16:18:24,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 16:18:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:24,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:24,272 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:24,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:24,477 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 16:18:24,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:24,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278387613] [2020-09-11 16:18:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:24,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278387613] [2020-09-11 16:18:24,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276614094] [2020-09-11 16:18:24,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:24,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:24,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:24,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:24,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:24,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:24,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480335158] [2020-09-11 16:18:24,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:24,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:24,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:24,837 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 16:18:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:25,947 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 16:18:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:25,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:25,949 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:25,949 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:18:25,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:18:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 16:18:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:25,952 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 16:18:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:25,952 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:25,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:25,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:25,952 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:26,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:18:26,153 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 16:18:26,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:26,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300955172] [2020-09-11 16:18:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:26,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300955172] [2020-09-11 16:18:26,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937939165] [2020-09-11 16:18:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:26,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:26,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:26,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269812449] [2020-09-11 16:18:26,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:26,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:26,481 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 16:18:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:27,417 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 16:18:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:27,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:27,420 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:18:27,420 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:18:27,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:18:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 16:18:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 16:18:27,423 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 16:18:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:27,423 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 16:18:27,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 16:18:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:27,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:27,423 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:27,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:27,624 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 16:18:27,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:27,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341156403] [2020-09-11 16:18:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341156403] [2020-09-11 16:18:27,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194066540] [2020-09-11 16:18:27,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:27,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:27,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:27,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:27,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584681761] [2020-09-11 16:18:27,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:27,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:27,977 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 16:18:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:29,119 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 16:18:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:29,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:29,120 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:29,120 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:29,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 16:18:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:18:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 16:18:29,123 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 16:18:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:29,123 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 16:18:29,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 16:18:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:29,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:29,124 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:29,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:29,325 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 16:18:29,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:29,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902021152] [2020-09-11 16:18:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902021152] [2020-09-11 16:18:29,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974521499] [2020-09-11 16:18:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:29,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:29,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:29,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:29,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:29,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760130788] [2020-09-11 16:18:29,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:29,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:29,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:29,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:29,745 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 16:18:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:30,294 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 16:18:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:30,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:30,295 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:18:30,295 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:18:30,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:18:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 16:18:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:30,298 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:30,298 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:30,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:30,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:30,299 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:30,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:30,506 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:30,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 16:18:30,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:30,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634719211] [2020-09-11 16:18:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:30,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634719211] [2020-09-11 16:18:30,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990328674] [2020-09-11 16:18:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:30,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:30,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:30,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:30,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:30,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71897129] [2020-09-11 16:18:30,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:30,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:30,955 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:31,592 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:18:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:31,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:31,594 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:18:31,594 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:18:31,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:18:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 16:18:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:31,596 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:31,597 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:31,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:31,597 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:31,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:31,798 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:31,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 16:18:31,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:31,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483463835] [2020-09-11 16:18:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483463835] [2020-09-11 16:18:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980880578] [2020-09-11 16:18:32,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:32,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:32,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:32,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:32,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570580224] [2020-09-11 16:18:32,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:32,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:32,200 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:32,810 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:18:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:32,811 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:32,812 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:18:32,812 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:18:32,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:18:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 16:18:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:32,815 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:32,815 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:32,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:32,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:32,815 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:33,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:33,016 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 16:18:33,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:33,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217838897] [2020-09-11 16:18:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217838897] [2020-09-11 16:18:33,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866286263] [2020-09-11 16:18:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:33,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:33,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:33,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:33,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840484355] [2020-09-11 16:18:33,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:33,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:33,451 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:34,224 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 16:18:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:34,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:34,226 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:34,226 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:34,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 16:18:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:34,229 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:34,229 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:34,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:34,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:34,230 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:34,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:18:34,431 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:34,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 16:18:34,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:34,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894005752] [2020-09-11 16:18:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:34,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894005752] [2020-09-11 16:18:34,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071178172] [2020-09-11 16:18:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:34,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:34,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:34,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354883680] [2020-09-11 16:18:34,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:34,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:34,824 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:35,511 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 16:18:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:35,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:35,513 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:35,513 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:35,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 16:18:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:35,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:35,516 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:35,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:35,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:35,517 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:35,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:18:35,720 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 16:18:35,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:35,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017539308] [2020-09-11 16:18:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017539308] [2020-09-11 16:18:36,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664771309] [2020-09-11 16:18:36,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:36,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:36,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:36,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:36,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23577532] [2020-09-11 16:18:36,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:36,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:36,132 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:37,021 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 16:18:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:37,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:37,022 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:37,023 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:37,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 16:18:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:37,025 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:37,026 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:37,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:37,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:37,026 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:37,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:18:37,227 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 16:18:37,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:37,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153444701] [2020-09-11 16:18:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:37,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153444701] [2020-09-11 16:18:37,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823362356] [2020-09-11 16:18:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:37,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:37,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:37,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712370517] [2020-09-11 16:18:37,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:37,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:37,610 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:38,374 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 16:18:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:38,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:38,376 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:38,376 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:38,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 16:18:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:38,379 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:38,379 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:38,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:38,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:38,380 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:38,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:18:38,583 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 16:18:38,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:38,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44066250] [2020-09-11 16:18:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:38,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44066250] [2020-09-11 16:18:38,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998222849] [2020-09-11 16:18:38,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:38,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:38,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:38,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:38,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:38,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500176390] [2020-09-11 16:18:38,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:38,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:38,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:38,986 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:39,960 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 16:18:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:39,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:39,961 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:39,961 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:39,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 16:18:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:39,964 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:39,964 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:39,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:39,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:40,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:40,167 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 16:18:40,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:40,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124682216] [2020-09-11 16:18:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:40,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124682216] [2020-09-11 16:18:40,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102473514] [2020-09-11 16:18:40,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:40,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:40,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:40,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:40,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526247869] [2020-09-11 16:18:40,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:40,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:40,539 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:41,376 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 16:18:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:41,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:41,377 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:41,377 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:41,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 16:18:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:41,380 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:41,380 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:41,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:41,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:41,381 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:41,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:18:41,582 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 16:18:41,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:41,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670101640] [2020-09-11 16:18:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670101640] [2020-09-11 16:18:41,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883919619] [2020-09-11 16:18:41,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:41,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:41,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:41,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:41,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995474867] [2020-09-11 16:18:41,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:41,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:41,993 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:43,089 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 16:18:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:43,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:43,090 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:18:43,090 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:18:43,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:18:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 16:18:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:43,093 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:43,094 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:43,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:43,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:43,095 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:43,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:43,302 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 16:18:43,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:43,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931692793] [2020-09-11 16:18:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:43,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931692793] [2020-09-11 16:18:43,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309577200] [2020-09-11 16:18:43,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:43,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:43,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:43,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025669835] [2020-09-11 16:18:43,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:43,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:43,656 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:44,579 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 16:18:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:44,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:44,581 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:18:44,581 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:18:44,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:18:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 16:18:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:44,584 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:44,584 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:44,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:44,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:44,585 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:44,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:44,785 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 16:18:44,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:44,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314461777] [2020-09-11 16:18:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:45,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314461777] [2020-09-11 16:18:45,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018433027] [2020-09-11 16:18:45,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:45,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:45,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:45,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:45,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:45,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:45,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524963989] [2020-09-11 16:18:45,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:45,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:45,179 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:46,367 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:18:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:46,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:46,369 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:18:46,369 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:46,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 16:18:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:46,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:46,372 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:46,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:46,373 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:46,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 16:18:46,574 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 16:18:46,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:46,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35119847] [2020-09-11 16:18:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:46,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35119847] [2020-09-11 16:18:46,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480462407] [2020-09-11 16:18:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:46,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:46,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:46,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:46,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938355827] [2020-09-11 16:18:46,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:46,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:46,947 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:47,934 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 16:18:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:47,935 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:47,936 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:18:47,936 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:18:47,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:18:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 16:18:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:47,939 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:47,939 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:47,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:47,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:47,946 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:48,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:48,147 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 16:18:48,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:48,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359797370] [2020-09-11 16:18:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:48,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359797370] [2020-09-11 16:18:48,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893563247] [2020-09-11 16:18:48,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:48,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:48,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:48,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:48,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:48,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875745344] [2020-09-11 16:18:48,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:48,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:48,533 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:49,852 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 16:18:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:49,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:49,854 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:18:49,854 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:18:49,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:18:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:18:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 16:18:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:49,857 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:49,857 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:49,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:49,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:49,858 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:50,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:18:50,059 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 16:18:50,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:50,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768016461] [2020-09-11 16:18:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:50,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768016461] [2020-09-11 16:18:50,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105132267] [2020-09-11 16:18:50,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:50,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:50,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:50,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:50,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681019548] [2020-09-11 16:18:50,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:50,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:50,432 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:51,500 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 16:18:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:51,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:51,502 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:51,502 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:51,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 16:18:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 16:18:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 16:18:51,505 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 16:18:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:51,505 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 16:18:51,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 16:18:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:51,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:51,505 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:51,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:18:51,706 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 16:18:51,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:51,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539965895] [2020-09-11 16:18:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:51,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539965895] [2020-09-11 16:18:51,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612442756] [2020-09-11 16:18:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:52,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:52,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:52,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:52,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:52,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882431355] [2020-09-11 16:18:52,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:52,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:52,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:52,102 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 16:18:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:53,317 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-09-11 16:18:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:53,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:53,319 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:18:53,319 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:18:53,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:18:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:18:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-09-11 16:18:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:18:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 16:18:53,321 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 16:18:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:53,322 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 16:18:53,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 16:18:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:53,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:53,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:53,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:18:53,523 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 16:18:53,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:53,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842820275] [2020-09-11 16:18:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842820275] [2020-09-11 16:18:53,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986458477] [2020-09-11 16:18:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:53,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:53,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:53,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079249460] [2020-09-11 16:18:53,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:53,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:53,887 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 16:18:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:55,140 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:18:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:55,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:55,142 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:55,142 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:55,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 16:18:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:18:55,145 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 16:18:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:55,145 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:18:55,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:18:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:55,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:55,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:55,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:18:55,347 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 16:18:55,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:55,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534989784] [2020-09-11 16:18:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534989784] [2020-09-11 16:18:55,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557283498] [2020-09-11 16:18:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:55,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:55,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:55,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722057172] [2020-09-11 16:18:55,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:55,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:55,773 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 16:18:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:57,154 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 16:18:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:57,155 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:18:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:57,156 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:57,156 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:57,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:18:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:18:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:18:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 16:18:57,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 16:18:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:57,159 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 16:18:57,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:18:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 16:18:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:57,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:57,160 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:57,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:57,361 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 16:18:57,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:57,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716609911] [2020-09-11 16:18:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716609911] [2020-09-11 16:18:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961190162] [2020-09-11 16:18:57,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:18:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:57,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:57,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:18:57,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345730681] [2020-09-11 16:18:57,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:57,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:57,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:57,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:57,809 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 16:18:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:58,348 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 16:18:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:58,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:18:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:58,350 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:18:58,350 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:18:58,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:18:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:18:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 16:18:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 16:18:58,352 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 16:18:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:58,352 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 16:18:58,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 16:18:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:58,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:58,353 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:58,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:58,554 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 16:18:58,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:58,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425344188] [2020-09-11 16:18:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:58,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425344188] [2020-09-11 16:18:58,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102824948] [2020-09-11 16:18:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:18:58,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:58,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:59,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:59,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:59,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:59,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874829166] [2020-09-11 16:18:59,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:59,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:59,036 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 16:18:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:59,692 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 16:18:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:59,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:18:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:59,694 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:59,694 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:59,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 16:18:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 16:18:59,697 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 16:18:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:59,707 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 16:18:59,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:18:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 16:18:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:59,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:59,708 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:59,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:59,915 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 16:18:59,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048447625] [2020-09-11 16:18:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048447625] [2020-09-11 16:19:00,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948587259] [2020-09-11 16:19:00,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:00,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:00,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:00,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009308158] [2020-09-11 16:19:00,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:00,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:00,370 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 16:19:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:01,068 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 16:19:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:01,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:01,069 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:01,069 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:01,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 16:19:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:19:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 16:19:01,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 16:19:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:01,072 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 16:19:01,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 16:19:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:01,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:01,073 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:01,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:01,274 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 16:19:01,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:01,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878904451] [2020-09-11 16:19:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:01,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878904451] [2020-09-11 16:19:01,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510224850] [2020-09-11 16:19:01,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:01,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:01,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:01,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:01,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:01,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816221287] [2020-09-11 16:19:01,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:01,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:01,771 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 16:19:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:02,542 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 16:19:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:02,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:02,543 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:02,543 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:02,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:02,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 16:19:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 16:19:02,546 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 16:19:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:02,547 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 16:19:02,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 16:19:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:02,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:02,547 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:02,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:02,749 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 16:19:02,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:02,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243299719] [2020-09-11 16:19:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243299719] [2020-09-11 16:19:03,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674630442] [2020-09-11 16:19:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:03,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:03,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354471875] [2020-09-11 16:19:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:03,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:03,184 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 16:19:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:03,907 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 16:19:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:03,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:03,909 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:03,909 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:03,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 16:19:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:19:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 16:19:03,911 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 16:19:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:03,911 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 16:19:03,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 16:19:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:03,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:03,912 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:04,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:04,113 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 16:19:04,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:04,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652515445] [2020-09-11 16:19:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:04,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652515445] [2020-09-11 16:19:04,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918396930] [2020-09-11 16:19:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:04,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:04,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:04,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:04,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:04,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:04,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620653761] [2020-09-11 16:19:04,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:04,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:04,599 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 16:19:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:05,423 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 16:19:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:05,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:05,425 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:19:05,425 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:19:05,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:19:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 16:19:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:19:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 16:19:05,428 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 16:19:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:05,429 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 16:19:05,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 16:19:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:05,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:05,429 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:05,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:05,632 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 16:19:05,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:05,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035065000] [2020-09-11 16:19:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:05,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035065000] [2020-09-11 16:19:05,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724460535] [2020-09-11 16:19:05,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:06,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:06,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:06,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990396846] [2020-09-11 16:19:06,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:06,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:06,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:06,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:06,053 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 16:19:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:06,924 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 16:19:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:06,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:06,926 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:06,926 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:06,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 16:19:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:19:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 16:19:06,929 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 16:19:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:06,929 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 16:19:06,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 16:19:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:06,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:06,930 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:07,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:19:07,131 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 16:19:07,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:07,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387410227] [2020-09-11 16:19:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:07,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387410227] [2020-09-11 16:19:07,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140807318] [2020-09-11 16:19:07,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:07,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:07,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:07,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:07,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:07,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498386124] [2020-09-11 16:19:07,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:07,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:07,580 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 16:19:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:08,581 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 16:19:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:08,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:08,583 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:08,583 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:08,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 16:19:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:19:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 16:19:08,585 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 16:19:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:08,586 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 16:19:08,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 16:19:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:08,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:08,586 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:08,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 16:19:08,787 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:08,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 16:19:08,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:08,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249860486] [2020-09-11 16:19:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249860486] [2020-09-11 16:19:09,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332401437] [2020-09-11 16:19:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:09,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:09,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:09,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:09,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:09,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776883491] [2020-09-11 16:19:09,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:09,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:09,202 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 16:19:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:10,083 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 16:19:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:10,084 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:10,085 INFO L225 Difference]: With dead ends: 125 [2020-09-11 16:19:10,085 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 16:19:10,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 16:19:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 16:19:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:19:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 16:19:10,087 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 16:19:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:10,088 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 16:19:10,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 16:19:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:10,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:10,088 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:10,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:19:10,289 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 16:19:10,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:10,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226564198] [2020-09-11 16:19:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:10,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226564198] [2020-09-11 16:19:10,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177025843] [2020-09-11 16:19:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:10,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:10,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:10,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:10,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:10,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:10,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001518388] [2020-09-11 16:19:10,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:10,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:10,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:10,733 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 16:19:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:11,842 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 16:19:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:11,843 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:11,843 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:19:11,843 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:19:11,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:19:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 16:19:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:19:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 16:19:11,846 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 16:19:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:11,847 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 16:19:11,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 16:19:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:11,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:11,847 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:12,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 16:19:12,048 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 16:19:12,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:12,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484297709] [2020-09-11 16:19:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484297709] [2020-09-11 16:19:12,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572201416] [2020-09-11 16:19:12,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:12,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:12,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502160947] [2020-09-11 16:19:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:12,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:12,453 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 16:19:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:13,451 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:19:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:13,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:13,454 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:13,454 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:13,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 16:19:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:19:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 16:19:13,456 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 16:19:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:13,456 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 16:19:13,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 16:19:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:13,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:13,457 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:13,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:13,658 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 16:19:13,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:13,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752171311] [2020-09-11 16:19:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:13,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752171311] [2020-09-11 16:19:13,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350158473] [2020-09-11 16:19:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:14,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:14,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:14,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:14,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:14,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:14,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769346944] [2020-09-11 16:19:14,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:14,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:14,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:14,087 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 16:19:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:15,286 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 16:19:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:15,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:15,288 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:15,288 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:15,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 16:19:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:19:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 16:19:15,291 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 16:19:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:15,291 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 16:19:15,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 16:19:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:15,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:15,291 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:15,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:15,492 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 16:19:15,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:15,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071679453] [2020-09-11 16:19:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:15,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071679453] [2020-09-11 16:19:15,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195642348] [2020-09-11 16:19:15,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:15,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:15,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:15,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:15,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474219093] [2020-09-11 16:19:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:15,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:15,909 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 16:19:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:17,010 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:19:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:17,011 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:17,012 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:19:17,012 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:19:17,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:19:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 16:19:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:19:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:19:17,015 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 16:19:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:17,015 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:19:17,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:19:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:17,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:17,016 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:17,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 16:19:17,224 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 16:19:17,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:17,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062115263] [2020-09-11 16:19:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:17,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062115263] [2020-09-11 16:19:17,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286967028] [2020-09-11 16:19:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:17,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:17,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:17,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:17,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:17,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749693831] [2020-09-11 16:19:17,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:17,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:17,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:17,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:17,666 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 16:19:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:19,012 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:19:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:19,013 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:19,014 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:19:19,014 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:19:19,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:19:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 16:19:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:19:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:19:19,017 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 16:19:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:19,017 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:19:19,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:19:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:19,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:19,017 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:19,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:19,218 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 16:19:19,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:19,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525211390] [2020-09-11 16:19:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525211390] [2020-09-11 16:19:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420989762] [2020-09-11 16:19:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:19,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:19,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:19,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:19,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21907646] [2020-09-11 16:19:19,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:19,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:19,616 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 16:19:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:20,758 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 16:19:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:20,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:20,759 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:20,760 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:20,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 16:19:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:19:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 16:19:20,762 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 16:19:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:20,763 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 16:19:20,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 16:19:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:20,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:20,764 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:20,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:20,972 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 16:19:20,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:20,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476325688] [2020-09-11 16:19:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476325688] [2020-09-11 16:19:21,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647380979] [2020-09-11 16:19:21,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:21,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:21,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:21,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:21,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261745275] [2020-09-11 16:19:21,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:21,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:21,397 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 16:19:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:22,859 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 16:19:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:22,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:22,861 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:22,861 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:22,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 16:19:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:19:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:19:22,864 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 16:19:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:22,865 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:19:22,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:19:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:22,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:22,865 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:23,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:23,066 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:23,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 16:19:23,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:23,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227737086] [2020-09-11 16:19:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227737086] [2020-09-11 16:19:23,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535930404] [2020-09-11 16:19:23,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:23,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:23,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594330700] [2020-09-11 16:19:23,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:23,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:23,469 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 16:19:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:24,686 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 16:19:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:24,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:24,688 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:19:24,688 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:19:24,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:19:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 16:19:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:19:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 16:19:24,691 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 16:19:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:24,691 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 16:19:24,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 16:19:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:24,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:24,692 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:24,899 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 16:19:24,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:24,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8014401] [2020-09-11 16:19:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8014401] [2020-09-11 16:19:25,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706497526] [2020-09-11 16:19:25,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:25,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:25,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:25,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:25,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550934543] [2020-09-11 16:19:25,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:25,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:25,311 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 16:19:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:26,804 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 16:19:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:26,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:26,806 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:19:26,806 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:26,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 16:19:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 16:19:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 16:19:26,809 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 16:19:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:26,809 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 16:19:26,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 16:19:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:26,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:26,809 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:27,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:27,010 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 16:19:27,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:27,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329710617] [2020-09-11 16:19:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329710617] [2020-09-11 16:19:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461436919] [2020-09-11 16:19:27,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:27,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:27,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:27,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327218930] [2020-09-11 16:19:27,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:27,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:27,522 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 16:19:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:28,246 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:19:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:19:28,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:28,248 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:19:28,248 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:19:28,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:19:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 16:19:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:28,251 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:28,251 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:28,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:28,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:28,251 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:28,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 16:19:28,452 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:28,453 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 16:19:28,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:28,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384081842] [2020-09-11 16:19:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:28,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384081842] [2020-09-11 16:19:28,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997752467] [2020-09-11 16:19:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:28,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:28,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:28,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:29,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:29,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30420902] [2020-09-11 16:19:29,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:29,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:29,004 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:29,749 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 16:19:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:29,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:29,751 INFO L225 Difference]: With dead ends: 131 [2020-09-11 16:19:29,751 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:19:29,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:19:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 16:19:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:29,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:29,754 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:29,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:29,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:29,755 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:29,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 16:19:29,957 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:29,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 16:19:29,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:29,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944406927] [2020-09-11 16:19:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:30,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944406927] [2020-09-11 16:19:30,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751487733] [2020-09-11 16:19:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:30,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:30,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:30,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:30,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:30,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:30,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135373440] [2020-09-11 16:19:30,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:30,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:30,465 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:31,254 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 16:19:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:31,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:31,255 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:19:31,256 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:19:31,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:19:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 16:19:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:31,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:31,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:31,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:31,259 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:31,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:31,460 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 16:19:31,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:31,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48725190] [2020-09-11 16:19:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48725190] [2020-09-11 16:19:31,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620059619] [2020-09-11 16:19:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:31,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:31,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:31,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:31,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610753620] [2020-09-11 16:19:31,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:31,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:31,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:31,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:31,989 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:32,939 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 16:19:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:32,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:32,941 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:32,941 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:32,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 16:19:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:32,944 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:32,944 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:32,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:32,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:32,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:33,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 16:19:33,146 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 16:19:33,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:33,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80051958] [2020-09-11 16:19:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:33,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80051958] [2020-09-11 16:19:33,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171288090] [2020-09-11 16:19:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:33,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:33,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:33,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236396399] [2020-09-11 16:19:33,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:33,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:33,623 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:34,485 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 16:19:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:34,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:34,487 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:34,487 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:34,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 16:19:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:34,490 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:34,490 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:34,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:34,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:34,491 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:34,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:34,692 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 16:19:34,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:34,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835496743] [2020-09-11 16:19:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:35,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835496743] [2020-09-11 16:19:35,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429919686] [2020-09-11 16:19:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:35,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:35,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:35,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:35,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452023170] [2020-09-11 16:19:35,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:35,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:35,210 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:36,282 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 16:19:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:36,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:36,284 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:36,284 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:36,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 16:19:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:36,288 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:36,289 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:36,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:36,289 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:36,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:36,499 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 16:19:36,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:36,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504849335] [2020-09-11 16:19:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504849335] [2020-09-11 16:19:36,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276932397] [2020-09-11 16:19:36,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:36,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:36,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:36,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479174716] [2020-09-11 16:19:36,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:36,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:36,975 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:37,929 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:19:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:37,931 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:37,931 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:37,932 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:37,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 16:19:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:37,934 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:37,934 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:37,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:37,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:37,935 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:38,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:38,136 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 16:19:38,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:38,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111702788] [2020-09-11 16:19:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111702788] [2020-09-11 16:19:38,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521741610] [2020-09-11 16:19:38,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:38,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:38,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:38,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:38,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842366018] [2020-09-11 16:19:38,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:38,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:38,639 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:39,818 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 16:19:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:39,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:39,821 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:39,821 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:39,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 16:19:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:39,824 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:39,824 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:39,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:39,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:39,825 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:40,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:40,034 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 16:19:40,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:40,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340148528] [2020-09-11 16:19:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:40,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340148528] [2020-09-11 16:19:40,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422610187] [2020-09-11 16:19:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:40,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:40,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:40,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:40,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:40,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669472075] [2020-09-11 16:19:40,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:40,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:40,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:40,496 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:41,540 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 16:19:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:41,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:41,542 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:41,542 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:41,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 16:19:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:41,544 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:41,545 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:41,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:41,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:41,545 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:41,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 16:19:41,746 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 16:19:41,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:41,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525582075] [2020-09-11 16:19:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:42,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525582075] [2020-09-11 16:19:42,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84690419] [2020-09-11 16:19:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:42,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:42,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:42,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:42,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:42,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962493883] [2020-09-11 16:19:42,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:42,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:42,241 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:43,562 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 16:19:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:43,563 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:43,564 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:43,564 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:43,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 16:19:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:43,566 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:43,567 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:43,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:43,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:43,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:43,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:43,776 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 16:19:43,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:43,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492048590] [2020-09-11 16:19:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:44,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492048590] [2020-09-11 16:19:44,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776559455] [2020-09-11 16:19:44,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:44,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:44,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:44,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720982801] [2020-09-11 16:19:44,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:44,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:44,216 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:45,355 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 16:19:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:45,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:45,357 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:19:45,357 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:19:45,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:19:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 16:19:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:45,360 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:45,360 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:45,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:45,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:45,361 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:45,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 16:19:45,562 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 16:19:45,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:45,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794321511] [2020-09-11 16:19:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794321511] [2020-09-11 16:19:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825491840] [2020-09-11 16:19:45,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:45,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:46,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:46,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:46,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:46,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210963778] [2020-09-11 16:19:46,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:46,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:46,039 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:47,480 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 16:19:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:47,482 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:47,482 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:19:47,482 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:19:47,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:19:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 16:19:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:47,485 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:47,485 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:47,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:47,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:47,486 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:47,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 16:19:47,687 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:47,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:47,687 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 16:19:47,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:47,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024937296] [2020-09-11 16:19:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:48,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024937296] [2020-09-11 16:19:48,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583669797] [2020-09-11 16:19:48,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:48,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:48,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:48,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:48,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033746514] [2020-09-11 16:19:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:48,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:48,171 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:49,420 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:19:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:49,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:49,421 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:19:49,421 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:19:49,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:19:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 16:19:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:49,424 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:49,424 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:49,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:49,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:49,425 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:49,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:49,631 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 16:19:49,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:49,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799401526] [2020-09-11 16:19:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799401526] [2020-09-11 16:19:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736783895] [2020-09-11 16:19:49,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:50,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:50,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:50,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:50,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:50,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539149146] [2020-09-11 16:19:50,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:50,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:50,113 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:51,696 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:19:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:51,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:51,698 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:19:51,698 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:19:51,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:19:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 16:19:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:51,702 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:51,702 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:51,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:51,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:51,703 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:51,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:51,907 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 16:19:51,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:51,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235035892] [2020-09-11 16:19:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:52,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235035892] [2020-09-11 16:19:52,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047904661] [2020-09-11 16:19:52,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:52,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:52,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:52,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:52,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:52,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473478826] [2020-09-11 16:19:52,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:52,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:52,361 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:53,690 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 16:19:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:53,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:53,692 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:19:53,692 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:19:53,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:19:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 16:19:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:53,694 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:53,694 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:53,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:53,695 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:53,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:53,896 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 16:19:53,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:53,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777021473] [2020-09-11 16:19:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777021473] [2020-09-11 16:19:54,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554763496] [2020-09-11 16:19:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:54,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:54,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:54,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:54,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:54,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431568087] [2020-09-11 16:19:54,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:54,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:54,383 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:56,112 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 16:19:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:56,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:56,114 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:19:56,114 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:19:56,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 16:19:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:19:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 16:19:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:56,116 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:56,116 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:56,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:56,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:56,117 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:56,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 16:19:56,317 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:56,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 16:19:56,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:56,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047444891] [2020-09-11 16:19:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047444891] [2020-09-11 16:19:56,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354406784] [2020-09-11 16:19:56,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:56,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:56,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246932383] [2020-09-11 16:19:56,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:56,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:56,777 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:58,190 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 16:19:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:58,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:58,191 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:58,191 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:58,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 16:19:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 16:19:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 16:19:58,193 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 16:19:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:58,193 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 16:19:58,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 16:19:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:58,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:58,194 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:58,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:58,395 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 16:19:58,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:58,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268685671] [2020-09-11 16:19:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:58,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268685671] [2020-09-11 16:19:58,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63115623] [2020-09-11 16:19:58,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:19:58,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:58,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:58,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:58,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:58,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621091896] [2020-09-11 16:19:58,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:58,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:58,866 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 16:20:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:00,622 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-11 16:20:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 16:20:00,623 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:00,624 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:20:00,624 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:20:00,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:20:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-11 16:20:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:20:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 16:20:00,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 16:20:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:00,627 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 16:20:00,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 16:20:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:00,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:00,628 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:00,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:00,829 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 16:20:00,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:00,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520699064] [2020-09-11 16:20:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520699064] [2020-09-11 16:20:01,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109211882] [2020-09-11 16:20:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:01,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:20:01,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:01,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:01,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:20:01,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165448152] [2020-09-11 16:20:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:01,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:01,313 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 16:20:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:03,032 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 16:20:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:03,033 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:03,033 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:20:03,033 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:20:03,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:20:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 16:20:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:20:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 16:20:03,036 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 16:20:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:03,036 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 16:20:03,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 16:20:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:03,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:03,037 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:03,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,238 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 16:20:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:03,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927058054] [2020-09-11 16:20:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927058054] [2020-09-11 16:20:03,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686495941] [2020-09-11 16:20:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:03,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:03,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:03,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:03,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:03,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733902969] [2020-09-11 16:20:03,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:03,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:03,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:03,772 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 16:20:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:05,574 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 16:20:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:05,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:05,576 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:20:05,576 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:20:05,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 16:20:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:20:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 16:20:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:20:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 16:20:05,579 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 16:20:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:05,580 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 16:20:05,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 16:20:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:05,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:05,581 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:05,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:05,789 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 16:20:05,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:05,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753405238] [2020-09-11 16:20:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753405238] [2020-09-11 16:20:06,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305359990] [2020-09-11 16:20:06,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:06,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:06,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:06,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272903000] [2020-09-11 16:20:06,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:06,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:06,354 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 16:20:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:07,134 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 16:20:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:20:07,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:07,136 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:20:07,136 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:20:07,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:20:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:20:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 16:20:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 16:20:07,139 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 16:20:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:07,139 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 16:20:07,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 16:20:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:07,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:07,140 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:07,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 16:20:07,348 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 16:20:07,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:07,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146478109] [2020-09-11 16:20:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:07,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146478109] [2020-09-11 16:20:07,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298689630] [2020-09-11 16:20:07,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:07,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 16:20:07,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:07,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:07,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:07,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:07,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992279736] [2020-09-11 16:20:07,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:07,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:07,966 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-11 16:20:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:08,863 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-11 16:20:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:20:08,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:08,865 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:20:08,865 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:20:08,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:20:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:20:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-11 16:20:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:20:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-11 16:20:08,869 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-11 16:20:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:08,869 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-11 16:20:08,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-11 16:20:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:08,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:08,870 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:09,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 16:20:09,078 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-11 16:20:09,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:09,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713568657] [2020-09-11 16:20:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:09,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713568657] [2020-09-11 16:20:09,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685321525] [2020-09-11 16:20:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:09,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:09,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:09,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956030788] [2020-09-11 16:20:09,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:09,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:09,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:09,649 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-11 16:20:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:10,556 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-11 16:20:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:20:10,557 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:10,558 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:20:10,558 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:20:10,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:20:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:20:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-11 16:20:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:20:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-11 16:20:10,561 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-11 16:20:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:10,561 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-11 16:20:10,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-11 16:20:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:10,562 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:10,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-11 16:20:10,763 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-11 16:20:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:10,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368418056] [2020-09-11 16:20:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:11,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368418056] [2020-09-11 16:20:11,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317780305] [2020-09-11 16:20:11,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:20:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:11,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:11,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:11,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:11,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986985119] [2020-09-11 16:20:11,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:11,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:11,368 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-11 16:20:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:12,334 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-11 16:20:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:20:12,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:12,336 INFO L225 Difference]: With dead ends: 139 [2020-09-11 16:20:12,336 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:20:12,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:20:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:20:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-11 16:20:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-11 16:20:12,340 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-11 16:20:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:12,340 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-11 16:20:12,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-11 16:20:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:12,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:12,341 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:12,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-11 16:20:12,551 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-11 16:20:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:12,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588921678] [2020-09-11 16:20:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:13,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588921678] [2020-09-11 16:20:13,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172549306] [2020-09-11 16:20:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:13,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 16:20:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:13,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:13,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:13,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743834305] [2020-09-11 16:20:13,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:13,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:13,105 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-11 16:20:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:14,043 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-11 16:20:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:20:14,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:14,044 INFO L225 Difference]: With dead ends: 139 [2020-09-11 16:20:14,044 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:20:14,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:20:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:20:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-11 16:20:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:20:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-11 16:20:14,047 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-11 16:20:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:14,047 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-11 16:20:14,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-11 16:20:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:14,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:14,048 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:14,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:14,248 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-11 16:20:14,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:14,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045724119] [2020-09-11 16:20:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:14,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045724119] [2020-09-11 16:20:14,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578277990] [2020-09-11 16:20:14,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:14,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:14,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:14,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:14,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:14,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:14,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070420969] [2020-09-11 16:20:14,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:14,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:14,842 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-11 16:20:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:15,939 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-11 16:20:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:20:15,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:15,940 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:20:15,940 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:20:15,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:20:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:20:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-11 16:20:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:20:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-11 16:20:15,943 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-11 16:20:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:15,943 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-11 16:20:15,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-11 16:20:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:15,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:15,944 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:16,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-11 16:20:16,149 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-11 16:20:16,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:16,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078940502] [2020-09-11 16:20:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078940502] [2020-09-11 16:20:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620174553] [2020-09-11 16:20:16,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:16,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:16,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:16,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:16,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:16,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692142779] [2020-09-11 16:20:16,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:16,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:16,668 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-11 16:20:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:17,771 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-11 16:20:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:20:17,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:17,773 INFO L225 Difference]: With dead ends: 137 [2020-09-11 16:20:17,773 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:20:17,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:20:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:20:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-11 16:20:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:20:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-11 16:20:17,776 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-11 16:20:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:17,777 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-11 16:20:17,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-11 16:20:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:17,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:17,777 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:17,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:17,978 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-11 16:20:17,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:17,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81540710] [2020-09-11 16:20:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:18,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81540710] [2020-09-11 16:20:18,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92459499] [2020-09-11 16:20:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:18,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 16:20:18,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:18,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:18,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:18,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:18,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:18,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619634839] [2020-09-11 16:20:18,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:18,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:18,553 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-11 16:20:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:19,810 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-11 16:20:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:20:19,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:19,812 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:20:19,812 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:20:19,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:20:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:20:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-11 16:20:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:20:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-11 16:20:19,815 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-11 16:20:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:19,815 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-11 16:20:19,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-11 16:20:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:19,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:19,816 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:20,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-11 16:20:20,019 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-11 16:20:20,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:20,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462112448] [2020-09-11 16:20:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:20,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462112448] [2020-09-11 16:20:20,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578383559] [2020-09-11 16:20:20,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:20,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:20,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:20,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75146036] [2020-09-11 16:20:20,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:20,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:20,519 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-11 16:20:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:21,693 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-11 16:20:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:20:21,694 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:21,694 INFO L225 Difference]: With dead ends: 135 [2020-09-11 16:20:21,694 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 16:20:21,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:20:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 16:20:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-11 16:20:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:20:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-11 16:20:21,696 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-11 16:20:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:21,697 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-11 16:20:21,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-11 16:20:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:21,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:21,697 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:21,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:21,898 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:21,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:21,899 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-11 16:20:21,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:21,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354508690] [2020-09-11 16:20:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:22,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354508690] [2020-09-11 16:20:22,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132482433] [2020-09-11 16:20:22,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 16:20:22,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:20:22,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:22,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:22,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:22,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:22,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:22,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974866658] [2020-09-11 16:20:22,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:22,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:22,458 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. Received shutdown request... [2020-09-11 16:20:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:20:22,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:22,749 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:20:22,757 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:20:22,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:20:22 BasicIcfg [2020-09-11 16:20:22,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:20:22,759 INFO L168 Benchmark]: Toolchain (without parser) took 252291.12 ms. Allocated memory was 147.3 MB in the beginning and 189.3 MB in the end (delta: 41.9 MB). Free memory was 102.3 MB in the beginning and 79.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 64.6 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,760 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 810.38 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.9 MB in the beginning and 164.0 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.24 ms. Allocated memory is still 203.9 MB. Free memory was 164.0 MB in the beginning and 162.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,764 INFO L168 Benchmark]: Boogie Preprocessor took 61.46 ms. Allocated memory is still 203.9 MB. Free memory was 162.0 MB in the beginning and 160.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,764 INFO L168 Benchmark]: RCFGBuilder took 492.72 ms. Allocated memory is still 203.9 MB. Free memory was 160.1 MB in the beginning and 140.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,765 INFO L168 Benchmark]: TraceAbstraction took 250828.02 ms. Allocated memory was 203.9 MB in the beginning and 189.3 MB in the end (delta: -14.7 MB). Free memory was 139.4 MB in the beginning and 81.2 MB in the end (delta: 58.2 MB). Peak memory consumption was 43.5 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:22,767 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 810.38 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.9 MB in the beginning and 164.0 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 86.24 ms. Allocated memory is still 203.9 MB. Free memory was 164.0 MB in the beginning and 162.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.46 ms. Allocated memory is still 203.9 MB. Free memory was 162.0 MB in the beginning and 160.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.72 ms. Allocated memory is still 203.9 MB. Free memory was 160.1 MB in the beginning and 140.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250828.02 ms. Allocated memory was 203.9 MB in the beginning and 189.3 MB in the end (delta: -14.7 MB). Free memory was 139.4 MB in the beginning and 81.2 MB in the end (delta: 58.2 MB). Peak memory consumption was 43.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (81states) and FLOYD_HOARE automaton (currently 3 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 250.6s, OverallIterations: 208, TraceHistogramMax: 10, AutomataDifference: 139.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 3304 SDtfs, 11258 SDslu, 20790 SDs, 0 SdLazy, 22393 SolverSat, 12534 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11023 GetRequests, 3669 SyntacticMatches, 203 SemanticMatches, 7150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66367 ImplicationChecksByTransitivity, 143.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 207 MinimizatonAttempts, 5087 StatesRemovedByMinimization, 206 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 8414 NumberOfCodeBlocks, 8414 NumberOfCodeBlocksAsserted, 1040 NumberOfCheckSat, 8003 ConstructedInterpolants, 0 QuantifiedInterpolants, 752207 SizeOfPredicates, 2561 NumberOfNonLiveVariables, 25797 ConjunctsInSsa, 3379 ConjunctsInUnsatCore, 411 InterpolantComputations, 5 PerfectInterpolantSequences, 0/15630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown