/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:41:09,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:41:09,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:41:09,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:41:09,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:41:09,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:41:09,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:41:09,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:41:09,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:41:09,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:41:09,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:41:09,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:41:09,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:41:09,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:41:09,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:41:09,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:41:09,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:41:09,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:41:09,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:41:09,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:41:09,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:41:09,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:41:09,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:41:09,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:41:09,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:41:09,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:41:09,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:41:09,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:41:09,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:41:09,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:41:09,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:41:09,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:41:09,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:41:09,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:41:09,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:41:09,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:41:09,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:41:09,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:41:09,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:41:09,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:41:09,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:41:09,712 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:41:09,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:41:09,712 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:41:09,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:41:09,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:41:09,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:41:09,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:41:09,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:41:09,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:41:09,717 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:41:09,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:41:09,717 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:41:09,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:41:09,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:41:09,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:41:09,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:41:09,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:41:09,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:09,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:41:09,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:41:09,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:41:09,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:41:09,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:41:09,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:41:09,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:41:09,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:41:10,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:41:10,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:41:10,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:41:10,052 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:41:10,053 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:41:10,053 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-18 11:41:10,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54028c88a/5e0a174cd3f4490986acc17d850a0807/FLAG4156279a1 [2019-12-18 11:41:10,640 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:41:10,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-18 11:41:10,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54028c88a/5e0a174cd3f4490986acc17d850a0807/FLAG4156279a1 [2019-12-18 11:41:10,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54028c88a/5e0a174cd3f4490986acc17d850a0807 [2019-12-18 11:41:10,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:41:10,953 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:41:10,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:10,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:41:10,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:41:10,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b0b2b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:10, skipping insertion in model container [2019-12-18 11:41:10,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:41:11,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:41:11,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,509 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:41:11,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,655 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:41:11,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11 WrapperNode [2019-12-18 11:41:11,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:11,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:41:11,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:41:11,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:41:11,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:41:11,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:41:11,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:41:11,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:41:11,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:41:11,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:41:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:41:11,797 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:41:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:41:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:41:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:41:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:41:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:41:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:41:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:41:11,800 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:41:12,126 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:41:12,127 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:41:12,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12 BoogieIcfgContainer [2019-12-18 11:41:12,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:41:12,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:41:12,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:41:12,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:41:12,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:41:10" (1/3) ... [2019-12-18 11:41:12,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c126c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (2/3) ... [2019-12-18 11:41:12,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c126c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12" (3/3) ... [2019-12-18 11:41:12,137 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2019-12-18 11:41:12,145 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:41:12,146 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:41:12,152 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:41:12,153 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:41:12,182 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,183 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,183 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,185 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,186 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,186 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,186 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,186 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,190 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,190 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,191 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,191 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,191 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,191 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,192 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,192 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,192 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,192 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,193 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,193 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,193 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,194 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,194 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,194 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,194 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,198 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,198 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,199 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,199 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,199 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,204 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,205 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,205 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,205 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,206 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,206 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,212 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,212 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,212 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,212 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,213 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,213 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,229 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:41:12,246 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:41:12,246 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:41:12,247 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:41:12,247 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:41:12,247 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:41:12,247 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:41:12,247 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:41:12,247 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:41:12,258 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 11:41:12,261 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,300 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,300 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,309 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,313 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,331 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,331 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,333 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,336 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 11:41:12,337 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:41:13,582 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 11:41:13,714 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 11:41:13,715 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 11:41:13,719 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:41:13,730 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:41:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:41:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:41:13,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,741 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:41:13,741 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 11:41:13,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019005190] [2019-12-18 11:41:13,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019005190] [2019-12-18 11:41:14,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:41:14,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758311687] [2019-12-18 11:41:14,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:41:14,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:41:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:14,065 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:41:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,114 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 11:41:14,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:41:14,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:41:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,145 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:41:14,145 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:41:14,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:41:14,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:41:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:41:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 11:41:14,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 11:41:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,194 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 11:41:14,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:41:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 11:41:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,202 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 11:41:14,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387559679] [2019-12-18 11:41:14,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387559679] [2019-12-18 11:41:14,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394812350] [2019-12-18 11:41:14,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,360 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 11:41:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,392 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 11:41:14,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,395 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:41:14,395 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:41:14,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:41:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 11:41:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 11:41:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 11:41:14,403 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 11:41:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,403 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 11:41:14,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 11:41:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,404 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,405 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,405 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 11:41:14,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685356882] [2019-12-18 11:41:14,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685356882] [2019-12-18 11:41:14,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79217232] [2019-12-18 11:41:14,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,471 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 11:41:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,487 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 11:41:14,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,489 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:41:14,489 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:41:14,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:41:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 11:41:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 11:41:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 11:41:14,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 11:41:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,498 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 11:41:14,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 11:41:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,499 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 11:41:14,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064045315] [2019-12-18 11:41:14,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064045315] [2019-12-18 11:41:14,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347922349] [2019-12-18 11:41:14,612 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504285658] [2019-12-18 11:41:14,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,752 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 11:41:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,781 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 11:41:14,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,783 INFO L225 Difference]: With dead ends: 56 [2019-12-18 11:41:14,783 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 11:41:14,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 11:41:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 11:41:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 11:41:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 11:41:14,791 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 11:41:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,791 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 11:41:14,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 11:41:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,792 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,998 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 11:41:14,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858378594] [2019-12-18 11:41:15,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858378594] [2019-12-18 11:41:15,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897373315] [2019-12-18 11:41:15,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:15,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:15,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294702695] [2019-12-18 11:41:15,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:15,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:15,186 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 11:41:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,246 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 11:41:15,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,247 INFO L225 Difference]: With dead ends: 63 [2019-12-18 11:41:15,248 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 11:41:15,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 11:41:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 11:41:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 11:41:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 11:41:15,255 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 11:41:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,256 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 11:41:15,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 11:41:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,257 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 11:41:15,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840295680] [2019-12-18 11:41:15,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840295680] [2019-12-18 11:41:15,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114296907] [2019-12-18 11:41:15,544 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:15,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299571205] [2019-12-18 11:41:15,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:15,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,657 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 11:41:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,687 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 11:41:15,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:15,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,688 INFO L225 Difference]: With dead ends: 66 [2019-12-18 11:41:15,689 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 11:41:15,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 11:41:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 11:41:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 11:41:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 11:41:15,696 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 11:41:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,696 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 11:41:15,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 11:41:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,697 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,697 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,909 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 11:41:15,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126419577] [2019-12-18 11:41:15,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126419577] [2019-12-18 11:41:15,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272992502] [2019-12-18 11:41:15,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,982 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 11:41:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,001 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 11:41:16,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,003 INFO L225 Difference]: With dead ends: 68 [2019-12-18 11:41:16,003 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 11:41:16,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 11:41:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 11:41:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 11:41:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 11:41:16,009 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 11:41:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,010 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 11:41:16,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 11:41:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,012 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,012 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 11:41:16,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144683778] [2019-12-18 11:41:16,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144683778] [2019-12-18 11:41:16,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:16,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:16,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974444130] [2019-12-18 11:41:16,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:16,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:16,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,070 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 11:41:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,095 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 11:41:16,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,096 INFO L225 Difference]: With dead ends: 69 [2019-12-18 11:41:16,096 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 11:41:16,097 INFO L631 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 [2019-12-18 11:41:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 11:41:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 11:41:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 11:41:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 11:41:16,103 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 11:41:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,103 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 11:41:16,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 11:41:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,104 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,104 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 11:41:16,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218040924] [2019-12-18 11:41:16,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218040924] [2019-12-18 11:41:16,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952538744] [2019-12-18 11:41:16,162 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587485571] [2019-12-18 11:41:16,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,262 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 11:41:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,341 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 11:41:16,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:16,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,343 INFO L225 Difference]: With dead ends: 77 [2019-12-18 11:41:16,343 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 11:41:16,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 11:41:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 11:41:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 11:41:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 11:41:16,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 11:41:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,350 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 11:41:16,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 11:41:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,351 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,351 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,556 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 11:41:16,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053731802] [2019-12-18 11:41:16,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053731802] [2019-12-18 11:41:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649930433] [2019-12-18 11:41:16,648 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:16,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:16,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:16,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647229728] [2019-12-18 11:41:16,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:16,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:16,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,782 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 11:41:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,839 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 11:41:16,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:16,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,840 INFO L225 Difference]: With dead ends: 80 [2019-12-18 11:41:16,840 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 11:41:16,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 11:41:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 11:41:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:16,847 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,847 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:16,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,849 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,053 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 11:41:17,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664546209] [2019-12-18 11:41:17,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664546209] [2019-12-18 11:41:17,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590537863] [2019-12-18 11:41:17,108 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:17,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937373640] [2019-12-18 11:41:17,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,229 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,308 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 11:41:17,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,309 INFO L225 Difference]: With dead ends: 81 [2019-12-18 11:41:17,309 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 11:41:17,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 11:41:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 11:41:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:17,326 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,326 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:17,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,328 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,328 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,536 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 11:41:17,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633485781] [2019-12-18 11:41:17,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633485781] [2019-12-18 11:41:17,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18334144] [2019-12-18 11:41:17,589 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:17,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506577093] [2019-12-18 11:41:17,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,683 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,748 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 11:41:17,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,749 INFO L225 Difference]: With dead ends: 85 [2019-12-18 11:41:17,750 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 11:41:17,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 11:41:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 11:41:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:17,755 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,756 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:17,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,757 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,961 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 11:41:17,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629969791] [2019-12-18 11:41:17,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629969791] [2019-12-18 11:41:18,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407445714] [2019-12-18 11:41:18,025 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:18,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435233482] [2019-12-18 11:41:18,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,143 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,251 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 11:41:18,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,253 INFO L225 Difference]: With dead ends: 86 [2019-12-18 11:41:18,255 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 11:41:18,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 11:41:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 11:41:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:18,264 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,264 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:18,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,269 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,474 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 11:41:18,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930250843] [2019-12-18 11:41:18,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930250843] [2019-12-18 11:41:18,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681436011] [2019-12-18 11:41:18,555 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:18,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130535064] [2019-12-18 11:41:18,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,703 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,829 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-18 11:41:18,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,832 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:18,832 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:18,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-18 11:41:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:18,843 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,843 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:18,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,848 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,848 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,055 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 11:41:19,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253877216] [2019-12-18 11:41:19,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253877216] [2019-12-18 11:41:19,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926796806] [2019-12-18 11:41:19,143 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132761792] [2019-12-18 11:41:19,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,253 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,363 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 11:41:19,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:19,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,367 INFO L225 Difference]: With dead ends: 85 [2019-12-18 11:41:19,367 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 11:41:19,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 11:41:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2019-12-18 11:41:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:19,371 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,371 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:19,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,372 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,576 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 11:41:19,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923095884] [2019-12-18 11:41:19,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923095884] [2019-12-18 11:41:19,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448490052] [2019-12-18 11:41:19,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:19,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739201846] [2019-12-18 11:41:19,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,738 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,829 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-18 11:41:19,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:19,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,831 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:19,831 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:19,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-18 11:41:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 11:41:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 11:41:19,836 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 11:41:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,836 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 11:41:19,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 11:41:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,838 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,041 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 11:41:20,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050510067] [2019-12-18 11:41:20,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050510067] [2019-12-18 11:41:20,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312556772] [2019-12-18 11:41:20,117 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:20,182 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:20,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196374180] [2019-12-18 11:41:20,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:20,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:20,265 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 11:41:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,374 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 11:41:20,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:20,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,376 INFO L225 Difference]: With dead ends: 92 [2019-12-18 11:41:20,376 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 11:41:20,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 11:41:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 11:41:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 11:41:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 11:41:20,379 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 11:41:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,380 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 11:41:20,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 11:41:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,380 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,380 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,581 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 11:41:20,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291527394] [2019-12-18 11:41:20,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291527394] [2019-12-18 11:41:20,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273006942] [2019-12-18 11:41:20,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:20,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:20,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343368410] [2019-12-18 11:41:20,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:20,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,803 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 11:41:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,837 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 11:41:20,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:20,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,838 INFO L225 Difference]: With dead ends: 95 [2019-12-18 11:41:20,838 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 11:41:20,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 11:41:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 11:41:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:20,843 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,843 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:20,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,844 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,048 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 11:41:21,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152424624] [2019-12-18 11:41:21,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152424624] [2019-12-18 11:41:21,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649070815] [2019-12-18 11:41:21,112 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:21,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 11:41:21,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732123522] [2019-12-18 11:41:21,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:21,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:21,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:21,171 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 8 states. [2019-12-18 11:41:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,224 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 11:41:21,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 11:41:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,226 INFO L225 Difference]: With dead ends: 98 [2019-12-18 11:41:21,226 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 11:41:21,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 11:41:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 11:41:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,229 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,230 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,230 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,231 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,437 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 11:41:21,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507647957] [2019-12-18 11:41:21,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507647957] [2019-12-18 11:41:21,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467518071] [2019-12-18 11:41:21,510 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:21,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187851173] [2019-12-18 11:41:21,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,633 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,736 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 11:41:21,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,737 INFO L225 Difference]: With dead ends: 101 [2019-12-18 11:41:21,738 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 11:41:21,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 11:41:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 11:41:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,741 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,742 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,743 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,946 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 11:41:21,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018180737] [2019-12-18 11:41:21,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018180737] [2019-12-18 11:41:22,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39819357] [2019-12-18 11:41:22,009 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,059 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:22,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478941150] [2019-12-18 11:41:22,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,188 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,350 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 11:41:22,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:22,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,351 INFO L225 Difference]: With dead ends: 105 [2019-12-18 11:41:22,351 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 11:41:22,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 11:41:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 11:41:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:22,357 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,359 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:22,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,360 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,567 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 11:41:22,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663415123] [2019-12-18 11:41:22,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663415123] [2019-12-18 11:41:22,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510955429] [2019-12-18 11:41:22,627 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:22,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605064433] [2019-12-18 11:41:22,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,743 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,831 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 11:41:22,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:22,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,833 INFO L225 Difference]: With dead ends: 103 [2019-12-18 11:41:22,833 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 11:41:22,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 11:41:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 11:41:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:22,837 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,837 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:22,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,838 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,041 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 11:41:23,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884869840] [2019-12-18 11:41:23,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884869840] [2019-12-18 11:41:23,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033128392] [2019-12-18 11:41:23,102 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129408496] [2019-12-18 11:41:23,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,227 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,380 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 11:41:23,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:23,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,381 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:23,381 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:23,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 11:41:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:23,386 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,386 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:23,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,387 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,591 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 11:41:23,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287554791] [2019-12-18 11:41:23,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287554791] [2019-12-18 11:41:23,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244639814] [2019-12-18 11:41:23,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:23,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:23,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911289572] [2019-12-18 11:41:23,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,753 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,896 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:23,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:23,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,903 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:23,903 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:23,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 11:41:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:23,907 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,907 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:23,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,908 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,112 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 11:41:24,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031504257] [2019-12-18 11:41:24,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031504257] [2019-12-18 11:41:24,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451563024] [2019-12-18 11:41:24,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:24,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153041277] [2019-12-18 11:41:24,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,296 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,416 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 11:41:24,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:24,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,418 INFO L225 Difference]: With dead ends: 106 [2019-12-18 11:41:24,419 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 11:41:24,419 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 11:41:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 11:41:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,425 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,425 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,426 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,630 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 11:41:24,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527852314] [2019-12-18 11:41:24,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527852314] [2019-12-18 11:41:24,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444958490] [2019-12-18 11:41:24,686 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:24,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795872206] [2019-12-18 11:41:24,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,807 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,960 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:24,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:24,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,962 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:24,962 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:24,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 11:41:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:24,965 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,965 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:24,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,965 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,166 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 11:41:25,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420886841] [2019-12-18 11:41:25,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420886841] [2019-12-18 11:41:25,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685350932] [2019-12-18 11:41:25,247 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,294 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:25,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536477635] [2019-12-18 11:41:25,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,385 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,603 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:25,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:25,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,605 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:25,605 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:25,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 11:41:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:25,609 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,610 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:25,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,611 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,814 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 11:41:25,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746057037] [2019-12-18 11:41:25,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746057037] [2019-12-18 11:41:25,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14318985] [2019-12-18 11:41:25,869 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:25,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220998589] [2019-12-18 11:41:25,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,992 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,154 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 11:41:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:26,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,155 INFO L225 Difference]: With dead ends: 111 [2019-12-18 11:41:26,155 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:26,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 11:41:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:26,158 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,158 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:26,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,159 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,359 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 11:41:26,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634624269] [2019-12-18 11:41:26,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634624269] [2019-12-18 11:41:26,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559116667] [2019-12-18 11:41:26,410 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:26,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956431201] [2019-12-18 11:41:26,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:26,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:26,556 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,742 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 11:41:26,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:26,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,744 INFO L225 Difference]: With dead ends: 109 [2019-12-18 11:41:26,744 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 11:41:26,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 11:41:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 11:41:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 11:41:26,748 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 11:41:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,748 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 11:41:26,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 11:41:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,749 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,952 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 11:41:26,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135562588] [2019-12-18 11:41:26,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135562588] [2019-12-18 11:41:27,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634345151] [2019-12-18 11:41:27,004 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:27,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981760856] [2019-12-18 11:41:27,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,124 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 11:41:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,310 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2019-12-18 11:41:27,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:27,311 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,312 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:27,312 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:27,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2019-12-18 11:41:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 11:41:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 11:41:27,317 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 11:41:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,317 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 11:41:27,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 11:41:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,318 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,521 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 11:41:27,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329121978] [2019-12-18 11:41:27,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329121978] [2019-12-18 11:41:27,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606371608] [2019-12-18 11:41:27,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:27,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217877186] [2019-12-18 11:41:27,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,700 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 11:41:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,857 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:27,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:27,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,859 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:27,859 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:27,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 11:41:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:27,864 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,865 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:27,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,865 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,069 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 11:41:28,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159832936] [2019-12-18 11:41:28,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159832936] [2019-12-18 11:41:28,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149488535] [2019-12-18 11:41:28,134 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:28,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:28,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765402031] [2019-12-18 11:41:28,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:28,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:28,232 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 11:41:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,371 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 11:41:28,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:28,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,377 INFO L225 Difference]: With dead ends: 107 [2019-12-18 11:41:28,377 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 11:41:28,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 11:41:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 11:41:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 11:41:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 11:41:28,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 11:41:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,381 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 11:41:28,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 11:41:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:28,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,382 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,585 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 11:41:28,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039068585] [2019-12-18 11:41:28,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039068585] [2019-12-18 11:41:28,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108977188] [2019-12-18 11:41:28,691 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:28,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:28,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148139972] [2019-12-18 11:41:28,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:28,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:28,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:28,931 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-18 11:41:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,974 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-18 11:41:28,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:28,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,976 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:28,977 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:28,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-18 11:41:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:28,984 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,984 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:28,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:28,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,985 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,190 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 11:41:29,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192305684] [2019-12-18 11:41:29,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192305684] [2019-12-18 11:41:29,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527668056] [2019-12-18 11:41:29,284 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:29,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:29,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:29,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191716663] [2019-12-18 11:41:29,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:29,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:29,509 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,661 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-18 11:41:29,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,662 INFO L225 Difference]: With dead ends: 116 [2019-12-18 11:41:29,663 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:29,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-18 11:41:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:29,667 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,667 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:29,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,668 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,872 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 11:41:29,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629989537] [2019-12-18 11:41:29,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629989537] [2019-12-18 11:41:29,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968014688] [2019-12-18 11:41:29,938 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:29,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:30,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:30,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046980592] [2019-12-18 11:41:30,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:30,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:30,069 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,203 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-18 11:41:30,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,204 INFO L225 Difference]: With dead ends: 121 [2019-12-18 11:41:30,205 INFO L226 Difference]: Without dead ends: 120 [2019-12-18 11:41:30,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-18 11:41:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-18 11:41:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:30,210 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,210 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:30,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,211 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,414 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 11:41:30,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109848634] [2019-12-18 11:41:30,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109848634] [2019-12-18 11:41:30,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590683365] [2019-12-18 11:41:30,471 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,522 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:30,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029417816] [2019-12-18 11:41:31,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,082 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,254 INFO L93 Difference]: Finished difference Result 126 states and 265 transitions. [2019-12-18 11:41:31,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:31,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,255 INFO L225 Difference]: With dead ends: 126 [2019-12-18 11:41:31,256 INFO L226 Difference]: Without dead ends: 125 [2019-12-18 11:41:31,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-18 11:41:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2019-12-18 11:41:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:31,261 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,261 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:31,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,262 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:31,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,465 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 11:41:31,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:31,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646512357] [2019-12-18 11:41:31,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646512357] [2019-12-18 11:41:31,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432205503] [2019-12-18 11:41:31,528 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:31,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682657039] [2019-12-18 11:41:31,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,658 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,779 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-18 11:41:31,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:31,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,780 INFO L225 Difference]: With dead ends: 122 [2019-12-18 11:41:31,780 INFO L226 Difference]: Without dead ends: 121 [2019-12-18 11:41:31,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-18 11:41:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-18 11:41:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:31,785 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,785 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:31,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,786 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,786 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:31,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,989 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 11:41:31,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:31,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240775697] [2019-12-18 11:41:31,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240775697] [2019-12-18 11:41:32,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579865327] [2019-12-18 11:41:32,073 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:32,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473181310] [2019-12-18 11:41:32,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,224 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,411 INFO L93 Difference]: Finished difference Result 131 states and 279 transitions. [2019-12-18 11:41:32,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:32,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,415 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:41:32,415 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 11:41:32,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 11:41:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-18 11:41:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-18 11:41:32,419 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-18 11:41:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,419 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-18 11:41:32,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-18 11:41:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,420 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,623 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 11:41:32,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928148945] [2019-12-18 11:41:32,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928148945] [2019-12-18 11:41:32,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96149483] [2019-12-18 11:41:32,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:32,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852466424] [2019-12-18 11:41:32,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,903 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-18 11:41:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:33,128 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2019-12-18 11:41:33,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:33,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:33,130 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:33,130 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 11:41:33,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 11:41:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2019-12-18 11:41:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-18 11:41:33,134 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-18 11:41:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:33,134 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-18 11:41:33,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-18 11:41:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:33,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:33,135 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:33,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,335 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 11:41:33,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:33,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146627152] [2019-12-18 11:41:33,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146627152] [2019-12-18 11:41:33,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223825599] [2019-12-18 11:41:33,406 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:33,464 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:33,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:33,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:33,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826093192] [2019-12-18 11:41:33,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:33,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:33,595 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-18 11:41:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:33,860 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-18 11:41:33,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:33,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:33,862 INFO L225 Difference]: With dead ends: 128 [2019-12-18 11:41:33,862 INFO L226 Difference]: Without dead ends: 127 [2019-12-18 11:41:33,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-18 11:41:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2019-12-18 11:41:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:33,866 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:33,867 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:33,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:33,867 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:33,867 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,070 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 11:41:34,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6938592] [2019-12-18 11:41:34,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6938592] [2019-12-18 11:41:34,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769016568] [2019-12-18 11:41:34,139 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:34,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450076799] [2019-12-18 11:41:34,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,247 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,363 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-18 11:41:34,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:34,364 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,365 INFO L225 Difference]: With dead ends: 121 [2019-12-18 11:41:34,365 INFO L226 Difference]: Without dead ends: 120 [2019-12-18 11:41:34,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-18 11:41:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-18 11:41:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:34,370 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,370 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:34,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,371 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,574 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 11:41:34,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640232444] [2019-12-18 11:41:34,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640232444] [2019-12-18 11:41:34,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014611877] [2019-12-18 11:41:34,635 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,686 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:34,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648173919] [2019-12-18 11:41:34,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,765 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,950 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-18 11:41:34,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:34,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,951 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:34,951 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:34,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-18 11:41:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:34,955 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,955 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:34,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,956 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:35,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,159 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 11:41:35,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:35,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341750822] [2019-12-18 11:41:35,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341750822] [2019-12-18 11:41:35,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762924378] [2019-12-18 11:41:35,226 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:35,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863618705] [2019-12-18 11:41:35,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,346 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:35,926 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-18 11:41:36,439 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:41:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:36,495 INFO L93 Difference]: Finished difference Result 147 states and 307 transitions. [2019-12-18 11:41:36,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:36,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:36,497 INFO L225 Difference]: With dead ends: 147 [2019-12-18 11:41:36,497 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 11:41:36,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 11:41:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 99. [2019-12-18 11:41:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:36,501 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:36,501 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:36,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:36,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:36,502 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:36,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,705 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 11:41:36,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:36,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407008763] [2019-12-18 11:41:36,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407008763] [2019-12-18 11:41:36,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394756043] [2019-12-18 11:41:36,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:36,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:36,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:36,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:36,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:36,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633958416] [2019-12-18 11:41:36,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:36,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:36,898 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,161 INFO L93 Difference]: Finished difference Result 145 states and 306 transitions. [2019-12-18 11:41:37,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,163 INFO L225 Difference]: With dead ends: 145 [2019-12-18 11:41:37,163 INFO L226 Difference]: Without dead ends: 143 [2019-12-18 11:41:37,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-18 11:41:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-18 11:41:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:37,168 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,168 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:37,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,169 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,169 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,372 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 11:41:37,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512301296] [2019-12-18 11:41:37,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512301296] [2019-12-18 11:41:37,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396057405] [2019-12-18 11:41:37,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:37,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:37,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:37,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:37,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460418345] [2019-12-18 11:41:37,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:37,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:37,613 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,880 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-18 11:41:37,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,884 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:37,885 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:37,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-18 11:41:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:37,890 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,891 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:37,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,892 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,097 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 11:41:38,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514101019] [2019-12-18 11:41:38,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514101019] [2019-12-18 11:41:38,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080391969] [2019-12-18 11:41:38,159 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:38,206 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:38,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220969236] [2019-12-18 11:41:38,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,281 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,473 INFO L93 Difference]: Finished difference Result 132 states and 283 transitions. [2019-12-18 11:41:38,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,475 INFO L225 Difference]: With dead ends: 132 [2019-12-18 11:41:38,475 INFO L226 Difference]: Without dead ends: 131 [2019-12-18 11:41:38,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-18 11:41:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2019-12-18 11:41:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:38,480 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,480 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:38,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,481 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,685 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 11:41:38,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150048804] [2019-12-18 11:41:38,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150048804] [2019-12-18 11:41:38,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305217782] [2019-12-18 11:41:38,747 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:38,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487906841] [2019-12-18 11:41:38,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,872 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,067 INFO L93 Difference]: Finished difference Result 131 states and 282 transitions. [2019-12-18 11:41:39,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:39,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,069 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:41:39,069 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 11:41:39,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 11:41:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2019-12-18 11:41:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:39,073 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,073 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:39,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,074 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,074 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,277 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 11:41:39,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678816798] [2019-12-18 11:41:39,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678816798] [2019-12-18 11:41:39,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735492279] [2019-12-18 11:41:39,354 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:39,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339244037] [2019-12-18 11:41:39,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,468 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,702 INFO L93 Difference]: Finished difference Result 130 states and 272 transitions. [2019-12-18 11:41:39,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:39,702 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,704 INFO L225 Difference]: With dead ends: 130 [2019-12-18 11:41:39,704 INFO L226 Difference]: Without dead ends: 129 [2019-12-18 11:41:39,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-18 11:41:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2019-12-18 11:41:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:39,708 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,708 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:39,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,709 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,913 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 11:41:39,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842185000] [2019-12-18 11:41:39,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842185000] [2019-12-18 11:41:39,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213798233] [2019-12-18 11:41:39,976 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:40,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:40,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:40,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167220453] [2019-12-18 11:41:40,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:40,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:40,091 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:40,538 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-18 11:41:41,504 WARN L192 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:41:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:41,608 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2019-12-18 11:41:41,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:41,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:41,609 INFO L225 Difference]: With dead ends: 144 [2019-12-18 11:41:41,610 INFO L226 Difference]: Without dead ends: 143 [2019-12-18 11:41:41,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-18 11:41:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-18 11:41:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:41,613 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:41,614 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:41,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:41,614 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:41,614 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,815 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 11:41:41,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512553814] [2019-12-18 11:41:41,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512553814] [2019-12-18 11:41:41,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499997587] [2019-12-18 11:41:41,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:41,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:41,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:41,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:41,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381097890] [2019-12-18 11:41:41,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:41,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:41,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:41,993 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,269 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2019-12-18 11:41:42,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:42,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,270 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:42,271 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:42,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2019-12-18 11:41:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-18 11:41:42,273 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-18 11:41:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,273 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-18 11:41:42,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-18 11:41:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:42,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,274 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,474 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 11:41:42,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473663800] [2019-12-18 11:41:42,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473663800] [2019-12-18 11:41:42,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352705606] [2019-12-18 11:41:42,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:42,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595335820] [2019-12-18 11:41:42,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,673 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 14 states. [2019-12-18 11:41:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,021 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-18 11:41:43,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:43,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,023 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:43,023 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:43,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2019-12-18 11:41:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:43,026 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,026 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:43,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:43,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,027 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,228 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 11:41:43,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433997336] [2019-12-18 11:41:43,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433997336] [2019-12-18 11:41:43,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51068256] [2019-12-18 11:41:43,295 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:43,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:43,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:43,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537109302] [2019-12-18 11:41:43,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:43,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:43,497 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,942 INFO L93 Difference]: Finished difference Result 153 states and 317 transitions. [2019-12-18 11:41:43,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:43,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,944 INFO L225 Difference]: With dead ends: 153 [2019-12-18 11:41:43,944 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 11:41:43,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 11:41:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2019-12-18 11:41:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:43,948 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,949 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:43,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:43,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,949 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:44,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,150 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 11:41:44,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:44,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253987760] [2019-12-18 11:41:44,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253987760] [2019-12-18 11:41:44,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368729747] [2019-12-18 11:41:44,212 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:44,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:44,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:44,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:44,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:44,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502455183] [2019-12-18 11:41:44,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:44,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:44,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:44,375 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:44,672 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2019-12-18 11:41:44,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:44,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:44,674 INFO L225 Difference]: With dead ends: 156 [2019-12-18 11:41:44,674 INFO L226 Difference]: Without dead ends: 154 [2019-12-18 11:41:44,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-18 11:41:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-12-18 11:41:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:44,678 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:44,679 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:44,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:44,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:44,680 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:44,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,883 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 11:41:44,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:44,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454836719] [2019-12-18 11:41:44,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454836719] [2019-12-18 11:41:44,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764038980] [2019-12-18 11:41:44,943 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:44,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:44,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:44,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:45,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536106341] [2019-12-18 11:41:45,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:45,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:45,043 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,300 INFO L93 Difference]: Finished difference Result 129 states and 274 transitions. [2019-12-18 11:41:45,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:45,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,302 INFO L225 Difference]: With dead ends: 129 [2019-12-18 11:41:45,302 INFO L226 Difference]: Without dead ends: 128 [2019-12-18 11:41:45,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-18 11:41:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-18 11:41:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:45,306 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,306 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:45,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,307 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:45,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,510 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:45,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 11:41:45,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:45,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568474521] [2019-12-18 11:41:45,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568474521] [2019-12-18 11:41:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586605121] [2019-12-18 11:41:45,581 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:45,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:45,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981351983] [2019-12-18 11:41:45,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:45,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:45,691 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,984 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-18 11:41:45,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:45,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,986 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:45,986 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:45,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2019-12-18 11:41:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:45,990 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,990 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:45,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,991 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,192 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 11:41:46,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764697725] [2019-12-18 11:41:46,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764697725] [2019-12-18 11:41:46,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780446785] [2019-12-18 11:41:46,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:46,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396765254] [2019-12-18 11:41:46,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,398 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:46,623 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2019-12-18 11:41:46,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:46,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:46,625 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:41:46,625 INFO L226 Difference]: Without dead ends: 144 [2019-12-18 11:41:46,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-18 11:41:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 99. [2019-12-18 11:41:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:46,630 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:46,630 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:46,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:46,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:46,631 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,834 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 11:41:46,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785752779] [2019-12-18 11:41:46,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785752779] [2019-12-18 11:41:46,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588786932] [2019-12-18 11:41:46,902 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:46,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:47,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:47,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131150021] [2019-12-18 11:41:47,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:47,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:47,013 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,284 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-18 11:41:47,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:47,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,286 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:47,286 INFO L226 Difference]: Without dead ends: 138 [2019-12-18 11:41:47,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:41:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-18 11:41:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2019-12-18 11:41:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-18 11:41:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2019-12-18 11:41:47,290 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 12 [2019-12-18 11:41:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,290 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2019-12-18 11:41:47,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2019-12-18 11:41:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:47,290 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,291 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,491 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 11:41:47,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130363319] [2019-12-18 11:41:47,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130363319] [2019-12-18 11:41:47,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521870961] [2019-12-18 11:41:47,552 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:47,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:47,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:47,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:47,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:48,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:48,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427437590] [2019-12-18 11:41:48,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:48,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=124, Unknown=1, NotChecked=0, Total=182 [2019-12-18 11:41:48,591 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand 14 states. [2019-12-18 11:41:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:49,255 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2019-12-18 11:41:49,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:49,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:49,259 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:49,259 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:49,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=196, Invalid=355, Unknown=1, NotChecked=0, Total=552 [2019-12-18 11:41:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2019-12-18 11:41:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-18 11:41:49,263 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-18 11:41:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:49,263 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-18 11:41:49,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-18 11:41:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:49,271 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:49,271 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:49,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,472 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 11:41:49,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:49,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363601559] [2019-12-18 11:41:49,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363601559] [2019-12-18 11:41:49,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604271048] [2019-12-18 11:41:49,539 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:49,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:49,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:49,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:49,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:49,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358436483] [2019-12-18 11:41:49,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:49,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:49,656 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 16 states. [2019-12-18 11:41:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:49,805 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-18 11:41:49,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:49,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:49,806 INFO L225 Difference]: With dead ends: 122 [2019-12-18 11:41:49,807 INFO L226 Difference]: Without dead ends: 121 [2019-12-18 11:41:49,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-18 11:41:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-18 11:41:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-18 11:41:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-18 11:41:49,810 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-18 11:41:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:49,811 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-18 11:41:49,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-18 11:41:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:49,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:49,812 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:50,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,014 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-18 11:41:50,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:50,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29209150] [2019-12-18 11:41:50,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29209150] [2019-12-18 11:41:50,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338488660] [2019-12-18 11:41:50,096 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:50,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:41:50,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-18 11:41:50,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588624692] [2019-12-18 11:41:50,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:41:50,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:41:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:50,235 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-18 11:41:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,261 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-18 11:41:50,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:50,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-18 11:41:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,263 INFO L225 Difference]: With dead ends: 149 [2019-12-18 11:41:50,264 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:50,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-18 11:41:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:41:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 11:41:50,268 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 11:41:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,268 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 11:41:50,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:41:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 11:41:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:50,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,269 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:50,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,473 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 11:41:50,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:50,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52505135] [2019-12-18 11:41:50,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52505135] [2019-12-18 11:41:50,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124464466] [2019-12-18 11:41:50,556 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:50,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:50,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:50,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:50,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525447519] [2019-12-18 11:41:50,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:50,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:50,705 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 11:41:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,856 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-18 11:41:50,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:50,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,858 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:41:50,858 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 11:41:50,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 11:41:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-18 11:41:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:41:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-18 11:41:50,862 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-18 11:41:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,863 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-18 11:41:50,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-18 11:41:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:50,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,863 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,067 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 11:41:51,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049974083] [2019-12-18 11:41:51,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049974083] [2019-12-18 11:41:51,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278114117] [2019-12-18 11:41:51,155 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,197 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:51,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:51,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:51,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:51,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705296366] [2019-12-18 11:41:51,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:51,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:51,298 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 16 states. [2019-12-18 11:41:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:51,451 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-18 11:41:51,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:51,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:51,453 INFO L225 Difference]: With dead ends: 171 [2019-12-18 11:41:51,453 INFO L226 Difference]: Without dead ends: 170 [2019-12-18 11:41:51,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-18 11:41:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-18 11:41:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:41:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-18 11:41:51,458 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-18 11:41:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:51,458 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-18 11:41:51,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-18 11:41:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:51,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:51,459 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,663 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 11:41:51,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295833651] [2019-12-18 11:41:51,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295833651] [2019-12-18 11:41:51,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013981182] [2019-12-18 11:41:51,734 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:52,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:52,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856748122] [2019-12-18 11:41:52,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:52,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:52,162 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-18 11:41:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,383 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-18 11:41:52,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:52,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,385 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:41:52,385 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:41:52,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:41:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2019-12-18 11:41:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:41:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-18 11:41:52,389 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-18 11:41:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,389 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-18 11:41:52,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-18 11:41:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,390 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:52,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,593 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 11:41:52,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:52,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171453801] [2019-12-18 11:41:52,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171453801] [2019-12-18 11:41:52,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877081948] [2019-12-18 11:41:52,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:52,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:52,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:52,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:52,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:52,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976935338] [2019-12-18 11:41:52,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:52,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:52,813 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 16 states. [2019-12-18 11:41:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,976 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-18 11:41:52,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:52,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,978 INFO L225 Difference]: With dead ends: 176 [2019-12-18 11:41:52,978 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:41:52,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:41:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-18 11:41:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:41:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-18 11:41:52,982 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-18 11:41:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,983 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-18 11:41:52,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-18 11:41:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,983 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:53,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,187 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 11:41:53,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:53,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189508375] [2019-12-18 11:41:53,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189508375] [2019-12-18 11:41:53,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666929298] [2019-12-18 11:41:53,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:53,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:53,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:53,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:53,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:53,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337542335] [2019-12-18 11:41:53,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:53,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:53,493 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-18 11:41:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:53,710 INFO L93 Difference]: Finished difference Result 189 states and 432 transitions. [2019-12-18 11:41:53,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:53,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:53,712 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:41:53,712 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:41:53,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:41:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-18 11:41:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:41:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-18 11:41:53,716 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-18 11:41:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:53,717 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-18 11:41:53,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-18 11:41:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:53,717 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:53,717 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:53,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,918 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 11:41:53,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:53,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495035558] [2019-12-18 11:41:53,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495035558] [2019-12-18 11:41:53,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182717697] [2019-12-18 11:41:53,993 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:54,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:54,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:54,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:55,528 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_179 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~j~0_179 1)) (<= (div (+ (* v_~j~0_179 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_179) 1)))) is different from true [2019-12-18 11:41:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:55,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:55,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:55,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358653266] [2019-12-18 11:41:55,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:55,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:55,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=131, Unknown=2, NotChecked=26, Total=240 [2019-12-18 11:41:55,530 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 16 states. [2019-12-18 11:41:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:56,454 INFO L93 Difference]: Finished difference Result 204 states and 464 transitions. [2019-12-18 11:41:56,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:56,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:56,456 INFO L225 Difference]: With dead ends: 204 [2019-12-18 11:41:56,456 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 11:41:56,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=205, Invalid=348, Unknown=3, NotChecked=44, Total=600 [2019-12-18 11:41:56,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 11:41:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 145. [2019-12-18 11:41:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:41:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-18 11:41:56,460 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-18 11:41:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:56,460 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-18 11:41:56,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-18 11:41:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:56,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:56,461 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:56,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:56,662 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 11:41:56,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:56,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281438955] [2019-12-18 11:41:56,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:56,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281438955] [2019-12-18 11:41:56,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209406353] [2019-12-18 11:41:56,739 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:56,787 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:56,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:56,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:56,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:57,264 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_183 Int)) (and (<= c_~j~0 (+ v_~j~0_183 c_~i~0)) (<= (div (+ (* v_~j~0_183 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~j~0_183 1)))) is different from true [2019-12-18 11:41:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 11:41:57,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:57,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:57,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227822116] [2019-12-18 11:41:57,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:57,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=134, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:41:57,821 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-18 11:41:59,633 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 11:42:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:00,208 INFO L93 Difference]: Finished difference Result 189 states and 421 transitions. [2019-12-18 11:42:00,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:00,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:00,210 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:42:00,210 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 11:42:00,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=237, Invalid=364, Unknown=3, NotChecked=46, Total=650 [2019-12-18 11:42:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 11:42:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2019-12-18 11:42:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:42:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-18 11:42:00,214 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-18 11:42:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:00,214 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-18 11:42:00,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-18 11:42:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:00,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:00,215 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:00,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,418 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:00,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 11:42:00,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:00,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567001558] [2019-12-18 11:42:00,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:00,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567001558] [2019-12-18 11:42:00,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767858047] [2019-12-18 11:42:00,490 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:00,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:00,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:00,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:00,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:00,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:00,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809713982] [2019-12-18 11:42:00,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:00,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:00,623 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:00,779 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-18 11:42:00,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:00,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:00,781 INFO L225 Difference]: With dead ends: 175 [2019-12-18 11:42:00,782 INFO L226 Difference]: Without dead ends: 174 [2019-12-18 11:42:00,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:42:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-18 11:42:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-18 11:42:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 11:42:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-18 11:42:00,786 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-18 11:42:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:00,787 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-18 11:42:00,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-18 11:42:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:00,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:00,787 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:00,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,988 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 11:42:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:00,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591650122] [2019-12-18 11:42:00,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591650122] [2019-12-18 11:42:01,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999915840] [2019-12-18 11:42:01,071 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:01,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:01,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048195933] [2019-12-18 11:42:01,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:01,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:01,228 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-18 11:42:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,515 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-18 11:42:01,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:01,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,517 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:01,517 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:01,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2019-12-18 11:42:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 11:42:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-18 11:42:01,521 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-18 11:42:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,521 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-18 11:42:01,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-18 11:42:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,523 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,726 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 11:42:01,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035547270] [2019-12-18 11:42:01,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035547270] [2019-12-18 11:42:01,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507499179] [2019-12-18 11:42:01,804 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:01,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:01,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:01,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:01,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289716366] [2019-12-18 11:42:01,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:01,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:01,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:01,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:01,949 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 16 states. [2019-12-18 11:42:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:02,297 INFO L93 Difference]: Finished difference Result 211 states and 478 transitions. [2019-12-18 11:42:02,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:02,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:02,299 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:42:02,299 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:42:02,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:42:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2019-12-18 11:42:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 11:42:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-18 11:42:02,304 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-18 11:42:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:02,304 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-18 11:42:02,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-18 11:42:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:02,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:02,305 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:02,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,508 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 11:42:02,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:02,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137254119] [2019-12-18 11:42:02,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137254119] [2019-12-18 11:42:02,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082351673] [2019-12-18 11:42:02,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:42:02,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:02,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806826441] [2019-12-18 11:42:02,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,740 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-18 11:42:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:03,156 INFO L93 Difference]: Finished difference Result 207 states and 469 transitions. [2019-12-18 11:42:03,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:03,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:03,158 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:42:03,159 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 11:42:03,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 11:42:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 149. [2019-12-18 11:42:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:42:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 361 transitions. [2019-12-18 11:42:03,162 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 361 transitions. Word has length 13 [2019-12-18 11:42:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:03,163 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 361 transitions. [2019-12-18 11:42:03,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 361 transitions. [2019-12-18 11:42:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:03,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:03,164 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:03,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,366 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 11:42:03,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:03,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544017530] [2019-12-18 11:42:03,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:03,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544017530] [2019-12-18 11:42:03,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000242780] [2019-12-18 11:42:03,434 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,476 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:03,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:03,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:03,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:03,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:03,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:03,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116137484] [2019-12-18 11:42:03,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:03,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:03,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:03,632 INFO L87 Difference]: Start difference. First operand 149 states and 361 transitions. Second operand 16 states. [2019-12-18 11:42:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:04,139 INFO L93 Difference]: Finished difference Result 207 states and 474 transitions. [2019-12-18 11:42:04,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:04,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:04,141 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:42:04,142 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:42:04,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:42:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 150. [2019-12-18 11:42:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 365 transitions. [2019-12-18 11:42:04,146 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 365 transitions. Word has length 13 [2019-12-18 11:42:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:04,147 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 365 transitions. [2019-12-18 11:42:04,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 365 transitions. [2019-12-18 11:42:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:04,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:04,147 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:04,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,348 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 11:42:04,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:04,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719470355] [2019-12-18 11:42:04,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719470355] [2019-12-18 11:42:04,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170024405] [2019-12-18 11:42:04,436 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,477 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:04,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:04,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:04,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:04,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:04,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476232757] [2019-12-18 11:42:04,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:04,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:04,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:04,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:04,623 INFO L87 Difference]: Start difference. First operand 150 states and 365 transitions. Second operand 16 states. [2019-12-18 11:42:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:05,323 INFO L93 Difference]: Finished difference Result 216 states and 495 transitions. [2019-12-18 11:42:05,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:05,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:05,325 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:05,326 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:05,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2019-12-18 11:42:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:42:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 361 transitions. [2019-12-18 11:42:05,330 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 361 transitions. Word has length 13 [2019-12-18 11:42:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:05,330 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 361 transitions. [2019-12-18 11:42:05,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 361 transitions. [2019-12-18 11:42:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:05,330 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:05,330 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:05,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,531 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 11:42:05,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:05,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831226625] [2019-12-18 11:42:05,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:05,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831226625] [2019-12-18 11:42:05,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114872116] [2019-12-18 11:42:05,607 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,650 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:05,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:05,652 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:05,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:05,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:05,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:05,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185786770] [2019-12-18 11:42:05,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:05,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:05,845 INFO L87 Difference]: Start difference. First operand 149 states and 361 transitions. Second operand 16 states. [2019-12-18 11:42:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,587 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-18 11:42:06,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:06,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,590 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:06,590 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:06,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2019-12-18 11:42:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 11:42:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 353 transitions. [2019-12-18 11:42:06,596 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 353 transitions. Word has length 13 [2019-12-18 11:42:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,597 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 353 transitions. [2019-12-18 11:42:06,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 353 transitions. [2019-12-18 11:42:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,598 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,598 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:06,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,799 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 11:42:06,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:06,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684352454] [2019-12-18 11:42:06,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684352454] [2019-12-18 11:42:06,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061366634] [2019-12-18 11:42:06,860 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:06,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:06,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:06,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894553567] [2019-12-18 11:42:06,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:06,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:06,985 INFO L87 Difference]: Start difference. First operand 147 states and 353 transitions. Second operand 16 states. [2019-12-18 11:42:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:07,130 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-18 11:42:07,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:07,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:07,132 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:42:07,132 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:42:07,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:42:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:42:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2019-12-18 11:42:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-18 11:42:07,137 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-18 11:42:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:07,137 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-18 11:42:07,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-18 11:42:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:07,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:07,138 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:07,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,341 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 11:42:07,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:07,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729168429] [2019-12-18 11:42:07,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729168429] [2019-12-18 11:42:07,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295683580] [2019-12-18 11:42:07,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:07,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:07,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:07,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:07,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:07,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345473771] [2019-12-18 11:42:07,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:07,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:07,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:07,573 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 16 states. [2019-12-18 11:42:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:07,821 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2019-12-18 11:42:07,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:07,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:07,823 INFO L225 Difference]: With dead ends: 195 [2019-12-18 11:42:07,824 INFO L226 Difference]: Without dead ends: 194 [2019-12-18 11:42:07,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-18 11:42:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2019-12-18 11:42:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:42:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-18 11:42:07,832 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-18 11:42:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:07,833 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-18 11:42:07,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-18 11:42:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:07,833 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:07,834 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:08,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:08,036 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 11:42:08,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:08,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031628232] [2019-12-18 11:42:08,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:08,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031628232] [2019-12-18 11:42:08,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237047166] [2019-12-18 11:42:08,103 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:08,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:08,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:08,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:08,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:08,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:08,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:08,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76391094] [2019-12-18 11:42:08,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:08,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:08,388 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 16 states. [2019-12-18 11:42:09,033 WARN L192 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:42:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:09,452 INFO L93 Difference]: Finished difference Result 220 states and 493 transitions. [2019-12-18 11:42:09,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:09,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:09,455 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:42:09,455 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 11:42:09,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 11:42:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2019-12-18 11:42:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-18 11:42:09,459 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-18 11:42:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:09,459 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-18 11:42:09,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-18 11:42:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:09,460 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:09,460 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:09,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,663 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 11:42:09,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:09,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740307954] [2019-12-18 11:42:09,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:09,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740307954] [2019-12-18 11:42:09,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948029384] [2019-12-18 11:42:09,730 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:09,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:09,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:09,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:09,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:09,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:09,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944338932] [2019-12-18 11:42:09,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:09,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:09,862 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 16 states. [2019-12-18 11:42:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:10,157 INFO L93 Difference]: Finished difference Result 205 states and 466 transitions. [2019-12-18 11:42:10,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:10,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:10,160 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:42:10,160 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:42:10,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:42:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 150. [2019-12-18 11:42:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 362 transitions. [2019-12-18 11:42:10,164 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 362 transitions. Word has length 13 [2019-12-18 11:42:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:10,164 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 362 transitions. [2019-12-18 11:42:10,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 362 transitions. [2019-12-18 11:42:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:10,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:10,165 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:10,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,366 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 11:42:10,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:10,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935922746] [2019-12-18 11:42:10,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935922746] [2019-12-18 11:42:10,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090769843] [2019-12-18 11:42:10,438 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,481 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:10,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:10,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:10,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:10,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:10,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773978077] [2019-12-18 11:42:10,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:10,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:10,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:10,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:10,590 INFO L87 Difference]: Start difference. First operand 150 states and 362 transitions. Second operand 16 states. [2019-12-18 11:42:11,431 WARN L192 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:11,594 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-12-18 11:42:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:11,848 INFO L93 Difference]: Finished difference Result 220 states and 490 transitions. [2019-12-18 11:42:11,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:11,849 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:11,851 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:42:11,851 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 11:42:11,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 11:42:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2019-12-18 11:42:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-18 11:42:11,855 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-18 11:42:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:11,855 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-18 11:42:11,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-18 11:42:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:11,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:11,856 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:12,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:12,057 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 11:42:12,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:12,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657195014] [2019-12-18 11:42:12,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657195014] [2019-12-18 11:42:12,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071796673] [2019-12-18 11:42:12,132 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:12,182 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:12,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:12,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:12,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:12,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:12,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871391517] [2019-12-18 11:42:12,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:12,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=162, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:12,822 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 16 states. [2019-12-18 11:42:13,291 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 11:42:13,777 WARN L192 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-18 11:42:14,049 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:14,495 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:42:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:14,653 INFO L93 Difference]: Finished difference Result 237 states and 538 transitions. [2019-12-18 11:42:14,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:14,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:14,656 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:42:14,656 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 11:42:14,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=244, Invalid=457, Unknown=1, NotChecked=0, Total=702 [2019-12-18 11:42:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 11:42:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 154. [2019-12-18 11:42:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 378 transitions. [2019-12-18 11:42:14,662 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 378 transitions. Word has length 13 [2019-12-18 11:42:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:14,662 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 378 transitions. [2019-12-18 11:42:14,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 378 transitions. [2019-12-18 11:42:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:14,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:14,663 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:14,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:14,867 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 11:42:14,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:14,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415532299] [2019-12-18 11:42:14,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:14,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415532299] [2019-12-18 11:42:14,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334121544] [2019-12-18 11:42:14,932 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:14,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:14,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:15,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:15,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:15,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926494626] [2019-12-18 11:42:15,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:15,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:15,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:15,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:15,069 INFO L87 Difference]: Start difference. First operand 154 states and 378 transitions. Second operand 16 states. [2019-12-18 11:42:15,445 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:15,993 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:16,306 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:16,807 INFO L93 Difference]: Finished difference Result 235 states and 530 transitions. [2019-12-18 11:42:16,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:16,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:16,809 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:42:16,810 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 11:42:16,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=278, Invalid=533, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 11:42:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 153. [2019-12-18 11:42:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 374 transitions. [2019-12-18 11:42:16,814 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 374 transitions. Word has length 13 [2019-12-18 11:42:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:16,814 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 374 transitions. [2019-12-18 11:42:16,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 374 transitions. [2019-12-18 11:42:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:16,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:16,815 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,018 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 11:42:17,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300061269] [2019-12-18 11:42:17,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300061269] [2019-12-18 11:42:17,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437495531] [2019-12-18 11:42:17,098 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:17,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:17,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:17,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:17,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193006094] [2019-12-18 11:42:17,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:17,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:17,229 INFO L87 Difference]: Start difference. First operand 153 states and 374 transitions. Second operand 16 states. [2019-12-18 11:42:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:17,508 INFO L93 Difference]: Finished difference Result 211 states and 481 transitions. [2019-12-18 11:42:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:17,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:17,509 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:42:17,509 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:42:17,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:42:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 155. [2019-12-18 11:42:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 382 transitions. [2019-12-18 11:42:17,513 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 382 transitions. Word has length 13 [2019-12-18 11:42:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:17,514 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 382 transitions. [2019-12-18 11:42:17,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 382 transitions. [2019-12-18 11:42:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:17,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:17,515 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,718 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 11:42:17,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367278750] [2019-12-18 11:42:17,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367278750] [2019-12-18 11:42:17,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634276921] [2019-12-18 11:42:17,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:17,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:17,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:17,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089454525] [2019-12-18 11:42:17,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:17,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:17,932 INFO L87 Difference]: Start difference. First operand 155 states and 382 transitions. Second operand 16 states. [2019-12-18 11:42:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:18,232 INFO L93 Difference]: Finished difference Result 224 states and 518 transitions. [2019-12-18 11:42:18,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:18,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:18,235 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:42:18,235 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:42:18,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:42:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2019-12-18 11:42:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 378 transitions. [2019-12-18 11:42:18,240 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 378 transitions. Word has length 13 [2019-12-18 11:42:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:18,240 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 378 transitions. [2019-12-18 11:42:18,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 378 transitions. [2019-12-18 11:42:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:18,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:18,241 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:18,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:18,444 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 11:42:18,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:18,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39492422] [2019-12-18 11:42:18,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:18,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39492422] [2019-12-18 11:42:18,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995703510] [2019-12-18 11:42:18,534 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:18,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:18,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:18,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:18,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:18,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:18,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344066270] [2019-12-18 11:42:18,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:18,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:18,666 INFO L87 Difference]: Start difference. First operand 154 states and 378 transitions. Second operand 16 states. [2019-12-18 11:42:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:18,920 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2019-12-18 11:42:18,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:18,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:18,922 INFO L225 Difference]: With dead ends: 233 [2019-12-18 11:42:18,922 INFO L226 Difference]: Without dead ends: 232 [2019-12-18 11:42:18,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-18 11:42:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2019-12-18 11:42:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 382 transitions. [2019-12-18 11:42:18,926 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 382 transitions. Word has length 13 [2019-12-18 11:42:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:18,926 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 382 transitions. [2019-12-18 11:42:18,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 382 transitions. [2019-12-18 11:42:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:18,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:18,928 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,132 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 11:42:19,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378608135] [2019-12-18 11:42:19,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378608135] [2019-12-18 11:42:19,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127296758] [2019-12-18 11:42:19,204 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,245 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:19,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746638784] [2019-12-18 11:42:19,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:19,329 INFO L87 Difference]: Start difference. First operand 155 states and 382 transitions. Second operand 16 states. [2019-12-18 11:42:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:19,625 INFO L93 Difference]: Finished difference Result 225 states and 517 transitions. [2019-12-18 11:42:19,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:19,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:19,626 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:42:19,626 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:42:19,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:42:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2019-12-18 11:42:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-18 11:42:19,635 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-18 11:42:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:19,636 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-18 11:42:19,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-18 11:42:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:19,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:19,638 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,840 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 11:42:19,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798805042] [2019-12-18 11:42:19,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798805042] [2019-12-18 11:42:19,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374890898] [2019-12-18 11:42:19,913 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,951 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:42:19,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465524435] [2019-12-18 11:42:20,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:20,033 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 16 states. [2019-12-18 11:42:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:20,410 INFO L93 Difference]: Finished difference Result 222 states and 504 transitions. [2019-12-18 11:42:20,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:20,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:20,412 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:20,412 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:20,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 150. [2019-12-18 11:42:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-18 11:42:20,419 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-18 11:42:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:20,421 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-18 11:42:20,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-18 11:42:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:20,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:20,421 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:20,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:20,625 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 11:42:20,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:20,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579793326] [2019-12-18 11:42:20,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579793326] [2019-12-18 11:42:20,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396972314] [2019-12-18 11:42:20,734 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:20,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:20,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821488037] [2019-12-18 11:42:20,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:20,904 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:21,201 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-18 11:42:21,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:21,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:21,203 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:21,203 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 11:42:21,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 11:42:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2019-12-18 11:42:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-18 11:42:21,207 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-18 11:42:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:21,208 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-18 11:42:21,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-18 11:42:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:21,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:21,209 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:21,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:21,413 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 11:42:21,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:21,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952351155] [2019-12-18 11:42:21,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:21,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952351155] [2019-12-18 11:42:21,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911589796] [2019-12-18 11:42:21,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:21,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:21,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:21,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:21,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:22,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:22,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932835] [2019-12-18 11:42:22,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:22,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=172, Unknown=3, NotChecked=0, Total=240 [2019-12-18 11:42:22,732 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:26,024 INFO L93 Difference]: Finished difference Result 202 states and 451 transitions. [2019-12-18 11:42:26,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:26,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:26,026 INFO L225 Difference]: With dead ends: 202 [2019-12-18 11:42:26,026 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 11:42:26,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=223, Invalid=476, Unknown=3, NotChecked=0, Total=702 [2019-12-18 11:42:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 11:42:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2019-12-18 11:42:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:42:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-18 11:42:26,030 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-18 11:42:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:26,030 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-18 11:42:26,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-18 11:42:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:26,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:26,031 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:26,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,231 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 11:42:26,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:26,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600558591] [2019-12-18 11:42:26,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:26,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600558591] [2019-12-18 11:42:26,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306945280] [2019-12-18 11:42:26,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:26,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:26,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:26,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:26,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:26,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:26,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676369035] [2019-12-18 11:42:26,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:26,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:26,454 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 16 states. [2019-12-18 11:42:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:26,771 INFO L93 Difference]: Finished difference Result 196 states and 442 transitions. [2019-12-18 11:42:26,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:26,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:26,773 INFO L225 Difference]: With dead ends: 196 [2019-12-18 11:42:26,773 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:42:26,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:42:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2019-12-18 11:42:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-18 11:42:26,777 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-18 11:42:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:26,777 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-18 11:42:26,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-18 11:42:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:26,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:26,778 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:26,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,979 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 11:42:26,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:26,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073434493] [2019-12-18 11:42:26,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:27,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073434493] [2019-12-18 11:42:27,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062098737] [2019-12-18 11:42:27,061 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:27,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:27,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:27,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:27,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:27,771 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:27,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:27,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:27,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620122675] [2019-12-18 11:42:27,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:27,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:27,773 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:28,826 WARN L192 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:29,293 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-12-18 11:42:29,734 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:30,436 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:42:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:30,494 INFO L93 Difference]: Finished difference Result 212 states and 473 transitions. [2019-12-18 11:42:30,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:30,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:30,496 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:42:30,496 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 11:42:30,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=232, Invalid=469, Unknown=1, NotChecked=0, Total=702 [2019-12-18 11:42:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 11:42:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 152. [2019-12-18 11:42:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-18 11:42:30,500 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-18 11:42:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:30,500 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-18 11:42:30,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-18 11:42:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:30,501 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:30,501 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:30,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,702 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 11:42:30,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:30,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518112274] [2019-12-18 11:42:30,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518112274] [2019-12-18 11:42:30,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51445932] [2019-12-18 11:42:30,782 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,840 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:30,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:30,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:30,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:32,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:32,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:32,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819555114] [2019-12-18 11:42:32,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:32,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=169, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:32,804 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 16 states. [2019-12-18 11:42:34,063 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:42:34,765 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:34,788 INFO L93 Difference]: Finished difference Result 229 states and 512 transitions. [2019-12-18 11:42:34,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:34,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:34,790 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:42:34,790 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:42:34,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=229, Invalid=470, Unknown=3, NotChecked=0, Total=702 [2019-12-18 11:42:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:42:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 152. [2019-12-18 11:42:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-18 11:42:34,793 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-18 11:42:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:34,794 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-18 11:42:34,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-18 11:42:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:34,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:34,794 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:34,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:34,995 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 11:42:34,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:34,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962497898] [2019-12-18 11:42:34,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962497898] [2019-12-18 11:42:35,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495180036] [2019-12-18 11:42:35,077 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,117 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:35,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:35,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:35,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:35,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:35,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316318575] [2019-12-18 11:42:35,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:35,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:35,215 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 16 states. [2019-12-18 11:42:36,260 WARN L192 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:36,560 INFO L93 Difference]: Finished difference Result 216 states and 489 transitions. [2019-12-18 11:42:36,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:36,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:36,562 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:36,562 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:36,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=275, Invalid=536, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 150. [2019-12-18 11:42:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:42:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-18 11:42:36,566 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-18 11:42:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:36,566 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-18 11:42:36,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-18 11:42:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:36,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:36,567 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:36,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,771 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 11:42:36,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:36,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185961405] [2019-12-18 11:42:36,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185961405] [2019-12-18 11:42:36,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483718454] [2019-12-18 11:42:36,840 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:36,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:36,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:36,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38348011] [2019-12-18 11:42:36,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:36,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:36,986 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:37,478 INFO L93 Difference]: Finished difference Result 200 states and 449 transitions. [2019-12-18 11:42:37,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:37,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:37,480 INFO L225 Difference]: With dead ends: 200 [2019-12-18 11:42:37,481 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 11:42:37,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 11:42:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2019-12-18 11:42:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-18 11:42:37,484 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-18 11:42:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:37,485 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-18 11:42:37,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-18 11:42:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:37,485 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:37,485 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:37,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,686 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 11:42:37,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:37,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549454026] [2019-12-18 11:42:37,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:37,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549454026] [2019-12-18 11:42:37,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295268528] [2019-12-18 11:42:37,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:37,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:37,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:37,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:41,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:41,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:41,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648423615] [2019-12-18 11:42:41,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:41,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:41,988 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 16 states. [2019-12-18 11:42:44,257 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:42:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:44,775 INFO L93 Difference]: Finished difference Result 221 states and 494 transitions. [2019-12-18 11:42:44,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:44,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:44,778 INFO L225 Difference]: With dead ends: 221 [2019-12-18 11:42:44,778 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:42:44,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:42:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 152. [2019-12-18 11:42:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-18 11:42:44,781 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-18 11:42:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:44,782 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-18 11:42:44,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-18 11:42:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:44,782 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:44,782 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:44,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:44,983 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 11:42:44,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:44,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571731014] [2019-12-18 11:42:44,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:45,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571731014] [2019-12-18 11:42:45,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869560405] [2019-12-18 11:42:45,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:45,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:45,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:45,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:45,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:45,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:45,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335244636] [2019-12-18 11:42:45,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:45,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:45,241 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 16 states. [2019-12-18 11:42:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:45,702 INFO L93 Difference]: Finished difference Result 244 states and 546 transitions. [2019-12-18 11:42:45,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:45,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:45,704 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:42:45,705 INFO L226 Difference]: Without dead ends: 242 [2019-12-18 11:42:45,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-18 11:42:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2019-12-18 11:42:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 379 transitions. [2019-12-18 11:42:45,708 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 379 transitions. Word has length 13 [2019-12-18 11:42:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:45,709 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 379 transitions. [2019-12-18 11:42:45,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 379 transitions. [2019-12-18 11:42:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:45,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:45,709 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:45,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,910 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 11:42:45,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:45,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11220988] [2019-12-18 11:42:45,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:45,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11220988] [2019-12-18 11:42:45,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702087215] [2019-12-18 11:42:45,980 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:46,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:46,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:46,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:46,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:46,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:46,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:46,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590425639] [2019-12-18 11:42:46,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:46,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:46,160 INFO L87 Difference]: Start difference. First operand 155 states and 379 transitions. Second operand 16 states. [2019-12-18 11:42:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:46,697 INFO L93 Difference]: Finished difference Result 230 states and 519 transitions. [2019-12-18 11:42:46,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:46,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:46,699 INFO L225 Difference]: With dead ends: 230 [2019-12-18 11:42:46,699 INFO L226 Difference]: Without dead ends: 228 [2019-12-18 11:42:46,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-18 11:42:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 153. [2019-12-18 11:42:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-18 11:42:46,703 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-18 11:42:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:46,703 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-18 11:42:46,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-18 11:42:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:46,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:46,704 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:46,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:46,905 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 11:42:46,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:46,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778750985] [2019-12-18 11:42:46,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:46,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778750985] [2019-12-18 11:42:46,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424444420] [2019-12-18 11:42:46,980 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:47,024 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:47,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:47,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:47,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:47,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:47,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:47,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248142917] [2019-12-18 11:42:47,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:47,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:47,145 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 16 states. [2019-12-18 11:42:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:48,080 INFO L93 Difference]: Finished difference Result 240 states and 535 transitions. [2019-12-18 11:42:48,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:48,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:48,082 INFO L225 Difference]: With dead ends: 240 [2019-12-18 11:42:48,082 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 11:42:48,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 11:42:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 154. [2019-12-18 11:42:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-18 11:42:48,086 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-18 11:42:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:48,086 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-18 11:42:48,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-18 11:42:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:48,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:48,087 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:48,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:48,287 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 11:42:48,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:48,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070792352] [2019-12-18 11:42:48,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:48,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070792352] [2019-12-18 11:42:48,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26632957] [2019-12-18 11:42:48,352 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:48,393 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:48,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:48,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:48,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:48,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:48,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:48,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52789516] [2019-12-18 11:42:48,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:48,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:48,478 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 16 states. [2019-12-18 11:42:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:48,830 INFO L93 Difference]: Finished difference Result 197 states and 455 transitions. [2019-12-18 11:42:48,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:48,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:48,832 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:42:48,832 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 11:42:48,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 11:42:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2019-12-18 11:42:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-18 11:42:48,836 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-18 11:42:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:48,836 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-18 11:42:48,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-18 11:42:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:48,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:48,837 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:49,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,038 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 11:42:49,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:49,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797787592] [2019-12-18 11:42:49,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797787592] [2019-12-18 11:42:49,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456380461] [2019-12-18 11:42:49,123 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:49,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:49,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:49,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512988787] [2019-12-18 11:42:49,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:49,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:49,254 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-18 11:42:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:49,652 INFO L93 Difference]: Finished difference Result 232 states and 532 transitions. [2019-12-18 11:42:49,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:49,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:49,655 INFO L225 Difference]: With dead ends: 232 [2019-12-18 11:42:49,655 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 11:42:49,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 11:42:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 156. [2019-12-18 11:42:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2019-12-18 11:42:49,659 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 13 [2019-12-18 11:42:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:49,659 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2019-12-18 11:42:49,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2019-12-18 11:42:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:49,660 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:49,660 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:49,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,861 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 11:42:49,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:49,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37029305] [2019-12-18 11:42:49,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37029305] [2019-12-18 11:42:49,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843102231] [2019-12-18 11:42:49,948 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:49,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:49,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:49,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:50,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:50,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:50,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756146878] [2019-12-18 11:42:50,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:50,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:50,103 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 16 states. [2019-12-18 11:42:50,762 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 11:42:51,031 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:42:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:51,057 INFO L93 Difference]: Finished difference Result 236 states and 536 transitions. [2019-12-18 11:42:51,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:51,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:51,060 INFO L225 Difference]: With dead ends: 236 [2019-12-18 11:42:51,060 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 11:42:51,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 11:42:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 157. [2019-12-18 11:42:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-18 11:42:51,064 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-18 11:42:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:51,064 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-18 11:42:51,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-18 11:42:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:51,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:51,066 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:51,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:51,267 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 11:42:51,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:51,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476055000] [2019-12-18 11:42:51,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:51,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476055000] [2019-12-18 11:42:51,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449109043] [2019-12-18 11:42:51,343 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:51,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:42:51,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:51,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:51,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:51,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:51,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:51,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489656566] [2019-12-18 11:42:51,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:51,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:51,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:51,488 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-18 11:42:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:51,900 INFO L93 Difference]: Finished difference Result 243 states and 553 transitions. [2019-12-18 11:42:51,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:51,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:51,903 INFO L225 Difference]: With dead ends: 243 [2019-12-18 11:42:51,903 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:42:51,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:42:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2019-12-18 11:42:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2019-12-18 11:42:51,912 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 13 [2019-12-18 11:42:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:51,912 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2019-12-18 11:42:51,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2019-12-18 11:42:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:51,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:51,913 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:52,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,115 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 11:42:52,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:52,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090041232] [2019-12-18 11:42:52,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:52,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090041232] [2019-12-18 11:42:52,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787951484] [2019-12-18 11:42:52,187 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:52,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:52,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:52,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:52,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:52,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:52,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:52,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661792535] [2019-12-18 11:42:52,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:52,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:52,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:52,324 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 16 states. [2019-12-18 11:42:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:52,664 INFO L93 Difference]: Finished difference Result 243 states and 551 transitions. [2019-12-18 11:42:52,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:52,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:52,666 INFO L225 Difference]: With dead ends: 243 [2019-12-18 11:42:52,666 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:42:52,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:42:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 157. [2019-12-18 11:42:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-18 11:42:52,671 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-18 11:42:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:52,671 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-18 11:42:52,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-18 11:42:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:52,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:52,672 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:52,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,875 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:52,876 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 11:42:52,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:52,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287072593] [2019-12-18 11:42:52,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:52,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287072593] [2019-12-18 11:42:52,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163381953] [2019-12-18 11:42:52,943 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,985 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:52,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:52,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:52,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:53,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:53,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668966535] [2019-12-18 11:42:53,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:53,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:53,066 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-18 11:42:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:53,365 INFO L93 Difference]: Finished difference Result 235 states and 541 transitions. [2019-12-18 11:42:53,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:53,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:53,366 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:42:53,366 INFO L226 Difference]: Without dead ends: 234 [2019-12-18 11:42:53,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-18 11:42:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 158. [2019-12-18 11:42:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:42:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 391 transitions. [2019-12-18 11:42:53,371 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 391 transitions. Word has length 13 [2019-12-18 11:42:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:53,371 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 391 transitions. [2019-12-18 11:42:53,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 391 transitions. [2019-12-18 11:42:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:53,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:53,372 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:53,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,575 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 11:42:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:53,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407536202] [2019-12-18 11:42:53,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407536202] [2019-12-18 11:42:53,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107108816] [2019-12-18 11:42:53,645 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,685 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:53,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:53,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:53,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:53,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:53,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459864564] [2019-12-18 11:42:53,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:53,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:53,768 INFO L87 Difference]: Start difference. First operand 158 states and 391 transitions. Second operand 16 states. [2019-12-18 11:42:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:54,172 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2019-12-18 11:42:54,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:54,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:54,174 INFO L225 Difference]: With dead ends: 239 [2019-12-18 11:42:54,174 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:42:54,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:42:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 157. [2019-12-18 11:42:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-18 11:42:54,179 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-18 11:42:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:54,179 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-18 11:42:54,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-18 11:42:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:54,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:54,180 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:54,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:54,383 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 11:42:54,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:54,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042561615] [2019-12-18 11:42:54,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:54,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042561615] [2019-12-18 11:42:54,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320468967] [2019-12-18 11:42:54,457 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:54,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:54,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:54,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:54,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:54,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67580301] [2019-12-18 11:42:54,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:54,709 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-18 11:42:55,567 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:55,596 INFO L93 Difference]: Finished difference Result 238 states and 541 transitions. [2019-12-18 11:42:55,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:55,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:55,599 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:42:55,599 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:42:55,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:42:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 156. [2019-12-18 11:42:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2019-12-18 11:42:55,605 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 13 [2019-12-18 11:42:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:55,605 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2019-12-18 11:42:55,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2019-12-18 11:42:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:55,606 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:55,606 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:55,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:55,809 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 11:42:55,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:55,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134361760] [2019-12-18 11:42:55,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:55,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134361760] [2019-12-18 11:42:55,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597675261] [2019-12-18 11:42:55,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:55,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:55,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:55,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:55,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:56,455 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:56,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:56,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:56,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220171749] [2019-12-18 11:42:56,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:56,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:56,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:56,458 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 16 states. [2019-12-18 11:42:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:57,592 INFO L93 Difference]: Finished difference Result 237 states and 537 transitions. [2019-12-18 11:42:57,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:57,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:57,594 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:42:57,594 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 11:42:57,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 11:42:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2019-12-18 11:42:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-18 11:42:57,598 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-18 11:42:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:57,599 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-18 11:42:57,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-18 11:42:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:57,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:57,600 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:57,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:57,802 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 11:42:57,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:57,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361733673] [2019-12-18 11:42:57,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:57,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361733673] [2019-12-18 11:42:57,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391227145] [2019-12-18 11:42:57,869 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:57,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:57,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:57,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:57,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:58,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:58,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300862302] [2019-12-18 11:42:58,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:58,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:58,003 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 16 states. [2019-12-18 11:42:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:58,271 INFO L93 Difference]: Finished difference Result 176 states and 401 transitions. [2019-12-18 11:42:58,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:58,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:58,272 INFO L225 Difference]: With dead ends: 176 [2019-12-18 11:42:58,272 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:42:58,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:42:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2019-12-18 11:42:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 363 transitions. [2019-12-18 11:42:58,276 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 363 transitions. Word has length 13 [2019-12-18 11:42:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:58,276 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 363 transitions. [2019-12-18 11:42:58,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 363 transitions. [2019-12-18 11:42:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:58,277 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:58,277 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:58,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,481 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 11:42:58,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:58,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601869402] [2019-12-18 11:42:58,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601869402] [2019-12-18 11:42:58,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113761996] [2019-12-18 11:42:58,564 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:42:58,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:42:58,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-18 11:42:58,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640068616] [2019-12-18 11:42:58,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:42:58,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:58,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:42:58,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:42:58,689 INFO L87 Difference]: Start difference. First operand 154 states and 363 transitions. Second operand 9 states. [2019-12-18 11:42:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:58,714 INFO L93 Difference]: Finished difference Result 203 states and 483 transitions. [2019-12-18 11:42:58,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:58,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-18 11:42:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:58,716 INFO L225 Difference]: With dead ends: 203 [2019-12-18 11:42:58,716 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:42:58,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:42:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:42:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-12-18 11:42:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-12-18 11:42:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 468 transitions. [2019-12-18 11:42:58,721 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 468 transitions. Word has length 13 [2019-12-18 11:42:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:58,721 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 468 transitions. [2019-12-18 11:42:58,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:42:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 468 transitions. [2019-12-18 11:42:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:58,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:58,721 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:58,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,922 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 94 times [2019-12-18 11:42:58,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:58,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57425572] [2019-12-18 11:42:58,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57425572] [2019-12-18 11:42:58,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401134411] [2019-12-18 11:42:58,998 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:59,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:59,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:59,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:59,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:59,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:59,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451348702] [2019-12-18 11:42:59,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:59,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:59,165 INFO L87 Difference]: Start difference. First operand 195 states and 468 transitions. Second operand 18 states. [2019-12-18 11:42:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:59,364 INFO L93 Difference]: Finished difference Result 214 states and 504 transitions. [2019-12-18 11:42:59,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:59,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:59,365 INFO L225 Difference]: With dead ends: 214 [2019-12-18 11:42:59,365 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 11:42:59,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 11:42:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2019-12-18 11:42:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-18 11:42:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2019-12-18 11:42:59,370 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 14 [2019-12-18 11:42:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:59,371 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2019-12-18 11:42:59,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2019-12-18 11:42:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:59,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:59,372 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:59,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:59,575 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:59,575 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 95 times [2019-12-18 11:42:59,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:59,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540354849] [2019-12-18 11:42:59,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540354849] [2019-12-18 11:42:59,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734016156] [2019-12-18 11:42:59,653 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:59,694 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:59,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:59,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:59,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:59,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:59,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574676027] [2019-12-18 11:42:59,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:59,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:59,817 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand 18 states. [2019-12-18 11:43:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:00,031 INFO L93 Difference]: Finished difference Result 227 states and 532 transitions. [2019-12-18 11:43:00,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:00,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:00,032 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:43:00,032 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:43:00,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:43:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 196. [2019-12-18 11:43:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-18 11:43:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 476 transitions. [2019-12-18 11:43:00,036 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 476 transitions. Word has length 14 [2019-12-18 11:43:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:00,036 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 476 transitions. [2019-12-18 11:43:00,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 476 transitions. [2019-12-18 11:43:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:00,036 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:00,036 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:00,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:00,237 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 96 times [2019-12-18 11:43:00,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:00,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111407795] [2019-12-18 11:43:00,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:00,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111407795] [2019-12-18 11:43:00,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053910126] [2019-12-18 11:43:00,354 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:00,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:43:00,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:00,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:00,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:00,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:00,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:00,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540456627] [2019-12-18 11:43:00,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:00,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:00,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:00,568 INFO L87 Difference]: Start difference. First operand 196 states and 476 transitions. Second operand 18 states. [2019-12-18 11:43:01,070 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:43:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:01,081 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-18 11:43:01,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:43:01,082 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:01,082 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:43:01,083 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 11:43:01,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:43:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 11:43:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 196. [2019-12-18 11:43:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-18 11:43:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 475 transitions. [2019-12-18 11:43:01,087 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 475 transitions. Word has length 14 [2019-12-18 11:43:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:01,087 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 475 transitions. [2019-12-18 11:43:01,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 475 transitions. [2019-12-18 11:43:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:01,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:01,087 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:01,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:01,288 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 97 times [2019-12-18 11:43:01,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:01,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349745922] [2019-12-18 11:43:01,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349745922] [2019-12-18 11:43:01,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371447050] [2019-12-18 11:43:01,382 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:01,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:01,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:01,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:01,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111416510] [2019-12-18 11:43:01,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:01,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:01,539 INFO L87 Difference]: Start difference. First operand 196 states and 475 transitions. Second operand 18 states. [2019-12-18 11:43:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:01,731 INFO L93 Difference]: Finished difference Result 235 states and 551 transitions. [2019-12-18 11:43:01,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:01,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:01,733 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:43:01,734 INFO L226 Difference]: Without dead ends: 234 [2019-12-18 11:43:01,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-18 11:43:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2019-12-18 11:43:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-18 11:43:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-18 11:43:01,737 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-18 11:43:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:01,737 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-18 11:43:01,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-18 11:43:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:01,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:01,738 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:01,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:01,939 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 98 times [2019-12-18 11:43:01,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:01,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828133221] [2019-12-18 11:43:01,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:02,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828133221] [2019-12-18 11:43:02,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897823415] [2019-12-18 11:43:02,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:02,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:02,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:02,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:02,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:02,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:02,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:02,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406155782] [2019-12-18 11:43:02,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:02,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:02,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:02,205 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 18 states. [2019-12-18 11:43:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:02,481 INFO L93 Difference]: Finished difference Result 252 states and 587 transitions. [2019-12-18 11:43:02,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:43:02,482 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:02,483 INFO L225 Difference]: With dead ends: 252 [2019-12-18 11:43:02,483 INFO L226 Difference]: Without dead ends: 251 [2019-12-18 11:43:02,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:43:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-18 11:43:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 199. [2019-12-18 11:43:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-18 11:43:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-18 11:43:02,488 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-18 11:43:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:02,488 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-18 11:43:02,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-18 11:43:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:02,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:02,489 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:02,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:02,692 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:02,692 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 99 times [2019-12-18 11:43:02,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:02,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312643542] [2019-12-18 11:43:02,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:02,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312643542] [2019-12-18 11:43:02,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003733944] [2019-12-18 11:43:02,772 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:02,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:02,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:02,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 11:43:02,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:02,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:02,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-12-18 11:43:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084958078] [2019-12-18 11:43:02,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:43:02,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:02,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:43:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:43:02,887 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 13 states. [2019-12-18 11:43:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:03,048 INFO L93 Difference]: Finished difference Result 262 states and 606 transitions. [2019-12-18 11:43:03,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:03,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-12-18 11:43:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:03,049 INFO L225 Difference]: With dead ends: 262 [2019-12-18 11:43:03,050 INFO L226 Difference]: Without dead ends: 261 [2019-12-18 11:43:03,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:43:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-12-18 11:43:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 200. [2019-12-18 11:43:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-18 11:43:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 491 transitions. [2019-12-18 11:43:03,054 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 491 transitions. Word has length 14 [2019-12-18 11:43:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:03,054 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 491 transitions. [2019-12-18 11:43:03,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:43:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 491 transitions. [2019-12-18 11:43:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:03,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:03,055 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:03,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:03,257 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash 802742867, now seen corresponding path program 100 times [2019-12-18 11:43:03,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:03,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922779189] [2019-12-18 11:43:03,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:03,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922779189] [2019-12-18 11:43:03,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010285506] [2019-12-18 11:43:03,346 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:03,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:03,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:03,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:03,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:04,758 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_321 Int)) (and (<= c_~j~0 (+ (* 2 c_~i~0) v_~j~0_321)) (<= c_~i~0 (+ v_~j~0_321 1)) (<= (div (+ (* v_~j~0_321 (- 1)) 1) (- 4)) 1))) is different from true [2019-12-18 11:43:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:04,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:04,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:04,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493411222] [2019-12-18 11:43:04,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:04,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:04,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:04,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=172, Unknown=2, NotChecked=30, Total=306 [2019-12-18 11:43:04,761 INFO L87 Difference]: Start difference. First operand 200 states and 491 transitions. Second operand 18 states. [2019-12-18 11:43:07,470 WARN L192 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:43:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:08,678 INFO L93 Difference]: Finished difference Result 247 states and 570 transitions. [2019-12-18 11:43:08,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:08,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:08,679 INFO L225 Difference]: With dead ends: 247 [2019-12-18 11:43:08,679 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:43:08,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=313, Invalid=498, Unknown=5, NotChecked=54, Total=870 [2019-12-18 11:43:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:43:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2019-12-18 11:43:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-18 11:43:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-18 11:43:08,684 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-18 11:43:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:08,684 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-18 11:43:08,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-18 11:43:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:08,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:08,685 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:08,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:08,885 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:08,886 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 101 times [2019-12-18 11:43:08,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:08,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444517963] [2019-12-18 11:43:08,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:08,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444517963] [2019-12-18 11:43:08,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542724005] [2019-12-18 11:43:08,965 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:09,009 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:09,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:09,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:09,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:09,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:09,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:09,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109049766] [2019-12-18 11:43:09,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:09,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:09,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:09,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:09,126 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-18 11:43:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:09,327 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-18 11:43:09,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:09,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:09,328 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:43:09,328 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:43:09,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:09,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:43:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-18 11:43:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:43:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-18 11:43:09,333 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-18 11:43:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:09,333 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-18 11:43:09,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-18 11:43:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:09,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:09,333 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:09,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:09,534 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 102 times [2019-12-18 11:43:09,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:09,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862329916] [2019-12-18 11:43:09,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:09,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862329916] [2019-12-18 11:43:09,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846216894] [2019-12-18 11:43:09,615 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:09,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:09,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:09,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:09,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:10,594 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:10,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:10,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:10,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691040745] [2019-12-18 11:43:10,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:10,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:10,596 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-18 11:43:11,092 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 11:43:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:11,901 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-18 11:43:11,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:11,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:11,903 INFO L225 Difference]: With dead ends: 275 [2019-12-18 11:43:11,903 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 11:43:11,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=273, Invalid=481, Unknown=2, NotChecked=0, Total=756 [2019-12-18 11:43:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 11:43:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 203. [2019-12-18 11:43:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:43:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-18 11:43:11,908 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-18 11:43:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:11,908 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-18 11:43:11,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-18 11:43:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:11,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:11,908 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:12,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:12,109 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 103 times [2019-12-18 11:43:12,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:12,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252788849] [2019-12-18 11:43:12,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:12,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252788849] [2019-12-18 11:43:12,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113930642] [2019-12-18 11:43:12,187 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:12,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:12,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:13,756 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:43:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:13,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:13,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:13,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782717130] [2019-12-18 11:43:13,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:13,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=205, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:13,758 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-18 11:43:14,990 WARN L192 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:43:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:15,427 INFO L93 Difference]: Finished difference Result 285 states and 656 transitions. [2019-12-18 11:43:15,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:15,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:15,428 INFO L225 Difference]: With dead ends: 285 [2019-12-18 11:43:15,428 INFO L226 Difference]: Without dead ends: 284 [2019-12-18 11:43:15,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=258, Invalid=497, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-12-18 11:43:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2019-12-18 11:43:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-18 11:43:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-18 11:43:15,433 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-18 11:43:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:15,433 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-18 11:43:15,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-18 11:43:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:15,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:15,434 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:15,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:15,635 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 104 times [2019-12-18 11:43:15,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:15,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262971755] [2019-12-18 11:43:15,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:15,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262971755] [2019-12-18 11:43:15,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763016793] [2019-12-18 11:43:15,712 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:15,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:15,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:15,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:15,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:18,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:18,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:18,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4691711] [2019-12-18 11:43:18,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:18,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:18,244 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 18 states. [2019-12-18 11:43:18,715 WARN L192 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-12-18 11:43:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:19,936 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-18 11:43:19,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:19,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:19,937 INFO L225 Difference]: With dead ends: 275 [2019-12-18 11:43:19,937 INFO L226 Difference]: Without dead ends: 269 [2019-12-18 11:43:19,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=321, Invalid=548, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:43:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-18 11:43:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2019-12-18 11:43:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-18 11:43:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-18 11:43:19,942 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-18 11:43:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:19,942 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-18 11:43:19,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-18 11:43:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:19,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:19,942 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:20,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:20,143 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 105 times [2019-12-18 11:43:20,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:20,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236662607] [2019-12-18 11:43:20,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:20,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236662607] [2019-12-18 11:43:20,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375154116] [2019-12-18 11:43:20,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:20,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:20,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:20,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 11:43:20,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:20,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:20,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 11:43:20,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136446124] [2019-12-18 11:43:20,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:43:20,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:43:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:43:20,318 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 14 states. [2019-12-18 11:43:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:20,615 INFO L93 Difference]: Finished difference Result 278 states and 646 transitions. [2019-12-18 11:43:20,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:20,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-12-18 11:43:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:20,617 INFO L225 Difference]: With dead ends: 278 [2019-12-18 11:43:20,617 INFO L226 Difference]: Without dead ends: 277 [2019-12-18 11:43:20,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:43:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-18 11:43:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 206. [2019-12-18 11:43:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-18 11:43:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 511 transitions. [2019-12-18 11:43:20,621 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 511 transitions. Word has length 14 [2019-12-18 11:43:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:20,622 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 511 transitions. [2019-12-18 11:43:20,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:43:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 511 transitions. [2019-12-18 11:43:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:20,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:20,622 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:20,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:20,823 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 106 times [2019-12-18 11:43:20,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:20,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564550788] [2019-12-18 11:43:20,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:20,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564550788] [2019-12-18 11:43:20,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084088566] [2019-12-18 11:43:20,910 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:20,953 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:20,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:20,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:20,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:22,436 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:43:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090489768] [2019-12-18 11:43:22,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:22,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=198, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:22,438 INFO L87 Difference]: Start difference. First operand 206 states and 511 transitions. Second operand 18 states. [2019-12-18 11:43:23,531 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:23,718 INFO L93 Difference]: Finished difference Result 302 states and 701 transitions. [2019-12-18 11:43:23,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:23,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:23,720 INFO L225 Difference]: With dead ends: 302 [2019-12-18 11:43:23,720 INFO L226 Difference]: Without dead ends: 301 [2019-12-18 11:43:23,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=278, Invalid=477, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-18 11:43:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2019-12-18 11:43:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-18 11:43:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-18 11:43:23,725 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-18 11:43:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:23,725 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-18 11:43:23,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-18 11:43:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:23,725 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:23,725 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:23,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:23,926 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 107 times [2019-12-18 11:43:23,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:23,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141577190] [2019-12-18 11:43:23,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141577190] [2019-12-18 11:43:24,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024465651] [2019-12-18 11:43:24,002 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:24,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:24,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:24,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:24,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:24,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:24,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770859586] [2019-12-18 11:43:24,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:24,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:24,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=200, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:24,722 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-18 11:43:24,907 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:25,600 INFO L93 Difference]: Finished difference Result 266 states and 623 transitions. [2019-12-18 11:43:25,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:25,600 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:25,601 INFO L225 Difference]: With dead ends: 266 [2019-12-18 11:43:25,602 INFO L226 Difference]: Without dead ends: 265 [2019-12-18 11:43:25,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=482, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-18 11:43:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-18 11:43:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:43:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-18 11:43:25,606 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-18 11:43:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:25,607 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-18 11:43:25,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-18 11:43:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:25,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:25,607 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:25,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,810 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:25,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 108 times [2019-12-18 11:43:25,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:25,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925872993] [2019-12-18 11:43:25,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925872993] [2019-12-18 11:43:25,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844842466] [2019-12-18 11:43:25,897 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:25,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:25,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:25,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:26,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002989218] [2019-12-18 11:43:26,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:26,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:26,080 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 18 states. [2019-12-18 11:43:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:26,274 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-18 11:43:26,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:26,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:26,276 INFO L225 Difference]: With dead ends: 236 [2019-12-18 11:43:26,276 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 11:43:26,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 11:43:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-18 11:43:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:26,281 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:26,281 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:26,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:26,282 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:26,282 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:26,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:26,485 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 109 times [2019-12-18 11:43:26,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:26,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269990220] [2019-12-18 11:43:26,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269990220] [2019-12-18 11:43:26,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222787505] [2019-12-18 11:43:26,606 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:26,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:26,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:26,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:26,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477373733] [2019-12-18 11:43:26,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:26,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:26,777 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:27,126 INFO L93 Difference]: Finished difference Result 272 states and 642 transitions. [2019-12-18 11:43:27,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:27,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:27,128 INFO L225 Difference]: With dead ends: 272 [2019-12-18 11:43:27,128 INFO L226 Difference]: Without dead ends: 271 [2019-12-18 11:43:27,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-18 11:43:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 208. [2019-12-18 11:43:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:27,132 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:27,133 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:27,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:27,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:27,133 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:27,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:27,334 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 110 times [2019-12-18 11:43:27,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:27,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968901871] [2019-12-18 11:43:27,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:27,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968901871] [2019-12-18 11:43:27,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892546835] [2019-12-18 11:43:27,415 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:27,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:27,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:27,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:27,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:27,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:27,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:27,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231532922] [2019-12-18 11:43:27,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:27,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:27,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:27,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:27,606 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:28,100 INFO L93 Difference]: Finished difference Result 310 states and 719 transitions. [2019-12-18 11:43:28,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:28,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:28,101 INFO L225 Difference]: With dead ends: 310 [2019-12-18 11:43:28,101 INFO L226 Difference]: Without dead ends: 309 [2019-12-18 11:43:28,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-18 11:43:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 209. [2019-12-18 11:43:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-18 11:43:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-18 11:43:28,106 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-18 11:43:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:28,106 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-18 11:43:28,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-18 11:43:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:28,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:28,107 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:28,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:28,308 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 111 times [2019-12-18 11:43:28,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:28,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380628968] [2019-12-18 11:43:28,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:28,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380628968] [2019-12-18 11:43:28,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866831480] [2019-12-18 11:43:28,384 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:28,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:43:28,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:28,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:28,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:28,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:28,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009360755] [2019-12-18 11:43:28,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:28,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:28,582 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 18 states. [2019-12-18 11:43:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:29,071 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-18 11:43:29,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:29,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:29,073 INFO L225 Difference]: With dead ends: 288 [2019-12-18 11:43:29,073 INFO L226 Difference]: Without dead ends: 287 [2019-12-18 11:43:29,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-18 11:43:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2019-12-18 11:43:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:29,077 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:29,077 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:29,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:29,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:29,078 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:29,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:29,279 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 112 times [2019-12-18 11:43:29,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:29,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665543194] [2019-12-18 11:43:29,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665543194] [2019-12-18 11:43:29,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134830598] [2019-12-18 11:43:29,364 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:29,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:29,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:29,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:29,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:29,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:29,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277953257] [2019-12-18 11:43:29,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:29,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:29,581 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:30,062 INFO L93 Difference]: Finished difference Result 297 states and 688 transitions. [2019-12-18 11:43:30,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:30,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:30,064 INFO L225 Difference]: With dead ends: 297 [2019-12-18 11:43:30,064 INFO L226 Difference]: Without dead ends: 296 [2019-12-18 11:43:30,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-18 11:43:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 210. [2019-12-18 11:43:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:43:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-18 11:43:30,070 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-18 11:43:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:30,070 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-18 11:43:30,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-18 11:43:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:30,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:30,071 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:30,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,274 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 113 times [2019-12-18 11:43:30,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:30,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215709981] [2019-12-18 11:43:30,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:30,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215709981] [2019-12-18 11:43:30,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677781266] [2019-12-18 11:43:30,356 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:43:30,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:30,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:30,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:30,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:30,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:30,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686117956] [2019-12-18 11:43:30,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:30,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:30,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:30,556 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 18 states. [2019-12-18 11:43:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:31,070 INFO L93 Difference]: Finished difference Result 331 states and 770 transitions. [2019-12-18 11:43:31,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:31,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:31,072 INFO L225 Difference]: With dead ends: 331 [2019-12-18 11:43:31,073 INFO L226 Difference]: Without dead ends: 329 [2019-12-18 11:43:31,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-18 11:43:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 212. [2019-12-18 11:43:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:43:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-18 11:43:31,077 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-18 11:43:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:31,077 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-18 11:43:31,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-18 11:43:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:31,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:31,078 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:31,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:31,280 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 114 times [2019-12-18 11:43:31,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:31,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726664103] [2019-12-18 11:43:31,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:31,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726664103] [2019-12-18 11:43:31,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573494813] [2019-12-18 11:43:31,375 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:31,421 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:43:31,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:31,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:31,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:31,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:31,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:31,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036670293] [2019-12-18 11:43:31,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:31,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:31,625 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-18 11:43:34,257 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 11:43:36,588 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:43:41,922 WARN L192 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:43:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:42,243 INFO L93 Difference]: Finished difference Result 329 states and 764 transitions. [2019-12-18 11:43:42,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:42,243 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:42,245 INFO L225 Difference]: With dead ends: 329 [2019-12-18 11:43:42,245 INFO L226 Difference]: Without dead ends: 327 [2019-12-18 11:43:42,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=338, Invalid=653, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:43:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-18 11:43:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 212. [2019-12-18 11:43:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:43:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-18 11:43:42,250 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-18 11:43:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:42,250 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-18 11:43:42,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-18 11:43:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:42,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:42,251 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:42,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:42,452 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 115 times [2019-12-18 11:43:42,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:42,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614599652] [2019-12-18 11:43:42,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:42,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614599652] [2019-12-18 11:43:42,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438653555] [2019-12-18 11:43:42,531 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:42,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:42,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:42,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:42,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:42,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209211350] [2019-12-18 11:43:42,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:42,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:42,786 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-18 11:43:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:44,331 INFO L93 Difference]: Finished difference Result 285 states and 673 transitions. [2019-12-18 11:43:44,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:44,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:44,333 INFO L225 Difference]: With dead ends: 285 [2019-12-18 11:43:44,333 INFO L226 Difference]: Without dead ends: 284 [2019-12-18 11:43:44,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:43:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-12-18 11:43:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2019-12-18 11:43:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:43:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-18 11:43:44,337 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-18 11:43:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:44,338 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-18 11:43:44,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-18 11:43:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:44,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:44,338 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:44,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:44,539 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 116 times [2019-12-18 11:43:44,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:44,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478792308] [2019-12-18 11:43:44,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:44,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478792308] [2019-12-18 11:43:44,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728136743] [2019-12-18 11:43:44,619 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:44,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:44,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:44,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:44,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:46,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:46,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:46,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386219352] [2019-12-18 11:43:46,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:46,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:46,854 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 18 states. [2019-12-18 11:43:53,689 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:43:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:57,868 INFO L93 Difference]: Finished difference Result 320 states and 752 transitions. [2019-12-18 11:43:57,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:57,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:57,869 INFO L225 Difference]: With dead ends: 320 [2019-12-18 11:43:57,870 INFO L226 Difference]: Without dead ends: 319 [2019-12-18 11:43:57,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-12-18 11:43:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 213. [2019-12-18 11:43:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-18 11:43:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-18 11:43:57,875 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-18 11:43:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:57,875 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-18 11:43:57,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-18 11:43:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:57,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:57,876 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:58,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:58,077 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 117 times [2019-12-18 11:43:58,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:58,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464646956] [2019-12-18 11:43:58,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:58,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464646956] [2019-12-18 11:43:58,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344225897] [2019-12-18 11:43:58,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:58,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:58,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:58,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:58,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:58,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:58,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:58,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962832144] [2019-12-18 11:43:58,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:58,367 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 18 states. [2019-12-18 11:43:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:58,913 INFO L93 Difference]: Finished difference Result 327 states and 764 transitions. [2019-12-18 11:43:58,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:58,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:58,915 INFO L225 Difference]: With dead ends: 327 [2019-12-18 11:43:58,915 INFO L226 Difference]: Without dead ends: 326 [2019-12-18 11:43:58,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-18 11:43:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2019-12-18 11:43:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:43:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-18 11:43:58,919 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-18 11:43:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:58,919 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-18 11:43:58,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-18 11:43:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:58,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:58,920 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:59,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:59,121 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 118 times [2019-12-18 11:43:59,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:59,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339464876] [2019-12-18 11:43:59,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:59,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339464876] [2019-12-18 11:43:59,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393810913] [2019-12-18 11:43:59,200 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:59,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:59,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:59,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:59,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:59,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:59,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:59,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499052683] [2019-12-18 11:43:59,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:59,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:59,434 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 18 states. [2019-12-18 11:44:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:00,044 INFO L93 Difference]: Finished difference Result 318 states and 743 transitions. [2019-12-18 11:44:00,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:00,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:00,046 INFO L225 Difference]: With dead ends: 318 [2019-12-18 11:44:00,046 INFO L226 Difference]: Without dead ends: 311 [2019-12-18 11:44:00,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-18 11:44:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 211. [2019-12-18 11:44:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-18 11:44:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 530 transitions. [2019-12-18 11:44:00,050 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 530 transitions. Word has length 14 [2019-12-18 11:44:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:00,050 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 530 transitions. [2019-12-18 11:44:00,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 530 transitions. [2019-12-18 11:44:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:00,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:00,051 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:00,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:00,252 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 119 times [2019-12-18 11:44:00,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:00,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307441377] [2019-12-18 11:44:00,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:00,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307441377] [2019-12-18 11:44:00,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127571376] [2019-12-18 11:44:00,339 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:00,383 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:44:00,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:00,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:00,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:00,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:00,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:00,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800909590] [2019-12-18 11:44:00,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:00,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:00,643 INFO L87 Difference]: Start difference. First operand 211 states and 530 transitions. Second operand 18 states. [2019-12-18 11:44:02,851 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:44:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:05,776 INFO L93 Difference]: Finished difference Result 285 states and 672 transitions. [2019-12-18 11:44:05,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:05,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:05,777 INFO L225 Difference]: With dead ends: 285 [2019-12-18 11:44:05,777 INFO L226 Difference]: Without dead ends: 284 [2019-12-18 11:44:05,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=289, Invalid=580, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-12-18 11:44:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 208. [2019-12-18 11:44:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:44:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 520 transitions. [2019-12-18 11:44:05,781 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 520 transitions. Word has length 14 [2019-12-18 11:44:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:05,781 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 520 transitions. [2019-12-18 11:44:05,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 520 transitions. [2019-12-18 11:44:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:05,782 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:05,782 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:05,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:05,983 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018186, now seen corresponding path program 120 times [2019-12-18 11:44:05,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:05,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314598687] [2019-12-18 11:44:05,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:06,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314598687] [2019-12-18 11:44:06,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698615624] [2019-12-18 11:44:06,060 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:06,106 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:44:06,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:06,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:06,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:06,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:06,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:06,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910343177] [2019-12-18 11:44:06,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:06,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:06,202 INFO L87 Difference]: Start difference. First operand 208 states and 520 transitions. Second operand 18 states. [2019-12-18 11:44:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:06,378 INFO L93 Difference]: Finished difference Result 229 states and 558 transitions. [2019-12-18 11:44:06,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:44:06,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:06,380 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:44:06,380 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:44:06,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:44:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:44:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2019-12-18 11:44:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-18 11:44:06,384 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-18 11:44:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:06,385 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-18 11:44:06,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-18 11:44:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:06,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:06,386 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:06,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:06,589 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 121 times [2019-12-18 11:44:06,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:06,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889766079] [2019-12-18 11:44:06,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:06,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889766079] [2019-12-18 11:44:06,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211543363] [2019-12-18 11:44:06,672 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:06,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:06,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:06,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:06,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:06,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416335204] [2019-12-18 11:44:06,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:06,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:06,827 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-18 11:44:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:07,238 INFO L93 Difference]: Finished difference Result 268 states and 637 transitions. [2019-12-18 11:44:07,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:07,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:07,240 INFO L225 Difference]: With dead ends: 268 [2019-12-18 11:44:07,240 INFO L226 Difference]: Without dead ends: 267 [2019-12-18 11:44:07,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-18 11:44:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 214. [2019-12-18 11:44:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-18 11:44:07,245 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-18 11:44:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:07,245 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-18 11:44:07,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-18 11:44:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:07,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:07,246 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:07,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:07,449 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 122 times [2019-12-18 11:44:07,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:07,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855569859] [2019-12-18 11:44:07,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:07,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855569859] [2019-12-18 11:44:07,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357192420] [2019-12-18 11:44:07,533 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:07,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:07,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:07,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:07,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:08,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:08,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:08,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859052716] [2019-12-18 11:44:08,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:08,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=217, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:08,080 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-18 11:44:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:10,190 INFO L93 Difference]: Finished difference Result 286 states and 673 transitions. [2019-12-18 11:44:10,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:10,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:10,191 INFO L225 Difference]: With dead ends: 286 [2019-12-18 11:44:10,191 INFO L226 Difference]: Without dead ends: 285 [2019-12-18 11:44:10,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=592, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-18 11:44:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2019-12-18 11:44:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-18 11:44:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-18 11:44:10,196 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-18 11:44:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:10,196 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-18 11:44:10,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-18 11:44:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:10,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:10,197 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:10,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:10,398 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 123 times [2019-12-18 11:44:10,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:10,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233443249] [2019-12-18 11:44:10,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:10,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233443249] [2019-12-18 11:44:10,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156621357] [2019-12-18 11:44:10,476 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:10,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:10,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:10,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:10,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:10,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:10,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:10,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970873596] [2019-12-18 11:44:10,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:10,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:10,633 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 18 states. [2019-12-18 11:44:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:11,027 INFO L93 Difference]: Finished difference Result 282 states and 665 transitions. [2019-12-18 11:44:11,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:11,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:11,028 INFO L225 Difference]: With dead ends: 282 [2019-12-18 11:44:11,028 INFO L226 Difference]: Without dead ends: 281 [2019-12-18 11:44:11,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-18 11:44:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 214. [2019-12-18 11:44:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-18 11:44:11,037 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-18 11:44:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:11,037 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-18 11:44:11,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-18 11:44:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:11,037 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:11,038 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:11,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:11,238 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 124 times [2019-12-18 11:44:11,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:11,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068528592] [2019-12-18 11:44:11,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:11,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068528592] [2019-12-18 11:44:11,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939811214] [2019-12-18 11:44:11,323 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:11,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:11,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:11,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:11,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:11,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:11,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:11,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055065155] [2019-12-18 11:44:11,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:11,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:11,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:11,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:11,866 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-18 11:44:12,404 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-12-18 11:44:13,274 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:13,745 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 11:44:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:14,828 INFO L93 Difference]: Finished difference Result 301 states and 700 transitions. [2019-12-18 11:44:14,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:14,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:14,830 INFO L225 Difference]: With dead ends: 301 [2019-12-18 11:44:14,830 INFO L226 Difference]: Without dead ends: 300 [2019-12-18 11:44:14,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=286, Invalid=582, Unknown=2, NotChecked=0, Total=870 [2019-12-18 11:44:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-18 11:44:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2019-12-18 11:44:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:14,834 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:14,834 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:14,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:14,835 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:14,835 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:15,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:15,035 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 125 times [2019-12-18 11:44:15,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:15,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457162061] [2019-12-18 11:44:15,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:15,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457162061] [2019-12-18 11:44:15,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209051334] [2019-12-18 11:44:15,121 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:15,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:15,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:15,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:15,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:18,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:18,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:18,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110103231] [2019-12-18 11:44:18,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:18,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=212, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:44:18,338 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:19,253 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 11:44:19,895 WARN L192 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:44:20,317 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:44:21,255 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 11:44:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:21,352 INFO L93 Difference]: Finished difference Result 331 states and 766 transitions. [2019-12-18 11:44:21,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:21,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:21,354 INFO L225 Difference]: With dead ends: 331 [2019-12-18 11:44:21,354 INFO L226 Difference]: Without dead ends: 329 [2019-12-18 11:44:21,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=287, Invalid=580, Unknown=3, NotChecked=0, Total=870 [2019-12-18 11:44:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-18 11:44:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 216. [2019-12-18 11:44:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:21,358 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:21,359 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:21,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:21,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:21,359 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:21,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:21,560 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 126 times [2019-12-18 11:44:21,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:21,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617474732] [2019-12-18 11:44:21,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:21,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617474732] [2019-12-18 11:44:21,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590814873] [2019-12-18 11:44:21,640 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:21,682 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:21,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:21,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:21,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:22,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:22,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:22,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809680724] [2019-12-18 11:44:22,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:22,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:22,088 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:22,749 WARN L192 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2019-12-18 11:44:23,295 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2019-12-18 11:44:24,097 WARN L192 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:25,105 INFO L93 Difference]: Finished difference Result 314 states and 732 transitions. [2019-12-18 11:44:25,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:25,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:25,106 INFO L225 Difference]: With dead ends: 314 [2019-12-18 11:44:25,106 INFO L226 Difference]: Without dead ends: 313 [2019-12-18 11:44:25,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=333, Invalid=657, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:44:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-18 11:44:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 214. [2019-12-18 11:44:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-18 11:44:25,111 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-18 11:44:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:25,112 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-18 11:44:25,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-18 11:44:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:25,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:25,112 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:25,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:25,313 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 127 times [2019-12-18 11:44:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:25,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982495649] [2019-12-18 11:44:25,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:25,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982495649] [2019-12-18 11:44:25,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136147058] [2019-12-18 11:44:25,396 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:25,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:25,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:25,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:25,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:25,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965383234] [2019-12-18 11:44:25,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:25,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:25,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:25,827 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-18 11:44:26,865 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-18 11:44:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:27,455 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-18 11:44:27,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:44:27,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:27,456 INFO L225 Difference]: With dead ends: 288 [2019-12-18 11:44:27,456 INFO L226 Difference]: Without dead ends: 287 [2019-12-18 11:44:27,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=860, Unknown=1, NotChecked=0, Total=1260 [2019-12-18 11:44:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-18 11:44:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 217. [2019-12-18 11:44:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-18 11:44:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-18 11:44:27,460 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-18 11:44:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:27,461 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-18 11:44:27,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-18 11:44:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:27,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:27,461 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:27,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:27,662 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:27,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 128 times [2019-12-18 11:44:27,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:27,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665926074] [2019-12-18 11:44:27,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:27,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665926074] [2019-12-18 11:44:27,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9198664] [2019-12-18 11:44:27,750 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:27,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:27,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:27,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:27,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:32,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:32,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:32,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250715000] [2019-12-18 11:44:32,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:32,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:32,020 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 18 states. [2019-12-18 11:44:32,789 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 11:44:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:35,766 INFO L93 Difference]: Finished difference Result 319 states and 750 transitions. [2019-12-18 11:44:35,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:35,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:35,767 INFO L225 Difference]: With dead ends: 319 [2019-12-18 11:44:35,767 INFO L226 Difference]: Without dead ends: 318 [2019-12-18 11:44:35,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=328, Invalid=663, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:44:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-12-18 11:44:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 216. [2019-12-18 11:44:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:35,771 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:35,772 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:35,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:35,772 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:35,772 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:35,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:35,973 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 129 times [2019-12-18 11:44:35,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:35,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351316931] [2019-12-18 11:44:35,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:36,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351316931] [2019-12-18 11:44:36,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379007958] [2019-12-18 11:44:36,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:36,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:44:36,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:36,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:36,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:36,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:36,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:36,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531973484] [2019-12-18 11:44:36,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:36,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:36,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=211, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:36,976 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:37,646 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:44:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:39,282 INFO L93 Difference]: Finished difference Result 352 states and 825 transitions. [2019-12-18 11:44:39,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:39,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:39,283 INFO L225 Difference]: With dead ends: 352 [2019-12-18 11:44:39,283 INFO L226 Difference]: Without dead ends: 350 [2019-12-18 11:44:39,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=335, Invalid=656, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:44:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-12-18 11:44:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2019-12-18 11:44:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-18 11:44:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-18 11:44:39,288 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-18 11:44:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:39,288 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-18 11:44:39,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-18 11:44:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:39,289 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:39,289 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:39,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:39,490 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 130 times [2019-12-18 11:44:39,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:39,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058478030] [2019-12-18 11:44:39,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:39,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058478030] [2019-12-18 11:44:39,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461284570] [2019-12-18 11:44:39,568 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:39,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:39,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:39,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:39,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:40,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:40,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:40,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867428360] [2019-12-18 11:44:40,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:40,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:40,563 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-18 11:44:43,737 WARN L192 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 11:44:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:43,784 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-18 11:44:43,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:43,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:43,786 INFO L225 Difference]: With dead ends: 341 [2019-12-18 11:44:43,786 INFO L226 Difference]: Without dead ends: 339 [2019-12-18 11:44:43,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=375, Invalid=744, Unknown=3, NotChecked=0, Total=1122 [2019-12-18 11:44:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2019-12-18 11:44:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 221. [2019-12-18 11:44:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:44:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:44:43,790 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:44:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:43,790 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:44:43,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:44:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:43,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:43,791 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:43,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:43,992 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 131 times [2019-12-18 11:44:43,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:43,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151025683] [2019-12-18 11:44:43,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:44,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151025683] [2019-12-18 11:44:44,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808528339] [2019-12-18 11:44:44,077 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:44,118 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:44:44,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:44,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:44,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:44,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:44,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:44,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346489785] [2019-12-18 11:44:44,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:44,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:44,254 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:44:44,919 WARN L192 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:44:45,391 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-18 11:44:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:45,644 INFO L93 Difference]: Finished difference Result 338 states and 792 transitions. [2019-12-18 11:44:45,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:45,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:45,646 INFO L225 Difference]: With dead ends: 338 [2019-12-18 11:44:45,646 INFO L226 Difference]: Without dead ends: 336 [2019-12-18 11:44:45,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:44:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-18 11:44:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 223. [2019-12-18 11:44:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-18 11:44:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-18 11:44:45,651 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-18 11:44:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:45,651 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-18 11:44:45,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-18 11:44:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:45,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:45,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:45,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:45,852 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 132 times [2019-12-18 11:44:45,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:45,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687807142] [2019-12-18 11:44:45,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:45,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687807142] [2019-12-18 11:44:45,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544115502] [2019-12-18 11:44:45,939 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:45,985 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:44:45,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:45,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:45,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:46,278 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:46,735 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_453 Int)) (and (<= c_~i~0 (+ (* 3 v_~i~0_453) 2)) (<= c_~j~0 (+ (* 2 v_~i~0_453) c_~i~0 2)) (<= (div (+ (* v_~i~0_453 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-18 11:44:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:46,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:46,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:46,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721625695] [2019-12-18 11:44:46,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:46,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=187, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:44:46,737 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-18 11:44:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:48,504 INFO L93 Difference]: Finished difference Result 341 states and 806 transitions. [2019-12-18 11:44:48,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:44:48,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:48,505 INFO L225 Difference]: With dead ends: 341 [2019-12-18 11:44:48,506 INFO L226 Difference]: Without dead ends: 340 [2019-12-18 11:44:48,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=411, Invalid=781, Unknown=2, NotChecked=66, Total=1260 [2019-12-18 11:44:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-12-18 11:44:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2019-12-18 11:44:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:44:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:44:48,510 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:44:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:48,511 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:44:48,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:44:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:48,511 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:48,511 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:48,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:48,712 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:48,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 133 times [2019-12-18 11:44:48,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:48,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149737395] [2019-12-18 11:44:48,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149737395] [2019-12-18 11:44:48,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956754153] [2019-12-18 11:44:48,795 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:48,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:48,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:48,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:48,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361587195] [2019-12-18 11:44:48,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:48,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:48,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:48,931 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:44:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:49,297 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2019-12-18 11:44:49,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:49,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:49,298 INFO L225 Difference]: With dead ends: 276 [2019-12-18 11:44:49,298 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 11:44:49,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 11:44:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 222. [2019-12-18 11:44:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:44:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:44:49,303 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:44:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:49,303 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:44:49,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:44:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:49,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:49,304 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:49,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:49,504 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 134 times [2019-12-18 11:44:49,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:49,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776456625] [2019-12-18 11:44:49,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:49,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776456625] [2019-12-18 11:44:49,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248149193] [2019-12-18 11:44:49,593 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:49,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:49,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:49,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:49,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:49,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:49,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:49,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405789110] [2019-12-18 11:44:49,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:49,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:49,736 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:44:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:50,200 INFO L93 Difference]: Finished difference Result 326 states and 768 transitions. [2019-12-18 11:44:50,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:50,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:50,202 INFO L225 Difference]: With dead ends: 326 [2019-12-18 11:44:50,202 INFO L226 Difference]: Without dead ends: 325 [2019-12-18 11:44:50,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-18 11:44:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 221. [2019-12-18 11:44:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:44:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:44:50,207 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:44:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:50,207 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:44:50,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:44:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:50,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:50,208 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:50,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:50,411 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 135 times [2019-12-18 11:44:50,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:50,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837938405] [2019-12-18 11:44:50,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:50,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837938405] [2019-12-18 11:44:50,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367421216] [2019-12-18 11:44:50,495 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:50,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:44:50,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:50,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:50,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:50,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:50,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:50,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206836858] [2019-12-18 11:44:50,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:50,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:50,641 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:44:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:51,116 INFO L93 Difference]: Finished difference Result 335 states and 798 transitions. [2019-12-18 11:44:51,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:51,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:51,118 INFO L225 Difference]: With dead ends: 335 [2019-12-18 11:44:51,118 INFO L226 Difference]: Without dead ends: 333 [2019-12-18 11:44:51,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-18 11:44:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 222. [2019-12-18 11:44:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:44:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:44:51,123 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:44:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:51,123 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:44:51,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:44:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:51,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:51,124 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:51,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:51,325 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 136 times [2019-12-18 11:44:51,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:51,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148502418] [2019-12-18 11:44:51,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:51,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148502418] [2019-12-18 11:44:51,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162790953] [2019-12-18 11:44:51,406 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:51,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:51,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:51,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:51,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:51,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:51,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:51,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446764255] [2019-12-18 11:44:51,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:51,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:51,559 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:44:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:52,033 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-18 11:44:52,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:52,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:52,034 INFO L225 Difference]: With dead ends: 341 [2019-12-18 11:44:52,035 INFO L226 Difference]: Without dead ends: 340 [2019-12-18 11:44:52,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-12-18 11:44:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 222. [2019-12-18 11:44:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:44:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:44:52,042 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:44:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:52,043 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:44:52,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:44:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:52,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:52,044 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:52,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:52,245 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 137 times [2019-12-18 11:44:52,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:52,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288955040] [2019-12-18 11:44:52,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:52,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288955040] [2019-12-18 11:44:52,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093211314] [2019-12-18 11:44:52,406 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:52,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:52,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:52,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:52,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:52,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:52,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:52,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576304841] [2019-12-18 11:44:52,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:52,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:52,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:52,636 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:44:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:52,990 INFO L93 Difference]: Finished difference Result 339 states and 804 transitions. [2019-12-18 11:44:52,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:52,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:52,991 INFO L225 Difference]: With dead ends: 339 [2019-12-18 11:44:52,991 INFO L226 Difference]: Without dead ends: 338 [2019-12-18 11:44:52,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-18 11:44:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 222. [2019-12-18 11:44:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:44:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:44:52,995 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:44:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:52,995 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:44:52,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:44:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:52,996 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:52,996 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:53,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,197 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 138 times [2019-12-18 11:44:53,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:53,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588788002] [2019-12-18 11:44:53,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588788002] [2019-12-18 11:44:53,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16912794] [2019-12-18 11:44:53,272 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:53,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:53,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:53,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:53,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:53,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861076246] [2019-12-18 11:44:53,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:53,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:53,436 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:44:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:53,870 INFO L93 Difference]: Finished difference Result 334 states and 793 transitions. [2019-12-18 11:44:53,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:53,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:53,871 INFO L225 Difference]: With dead ends: 334 [2019-12-18 11:44:53,872 INFO L226 Difference]: Without dead ends: 332 [2019-12-18 11:44:53,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-18 11:44:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 220. [2019-12-18 11:44:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 11:44:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 559 transitions. [2019-12-18 11:44:53,877 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 559 transitions. Word has length 14 [2019-12-18 11:44:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:53,878 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 559 transitions. [2019-12-18 11:44:53,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 559 transitions. [2019-12-18 11:44:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:53,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:53,878 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:54,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:54,082 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 139 times [2019-12-18 11:44:54,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:54,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103342677] [2019-12-18 11:44:54,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:54,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103342677] [2019-12-18 11:44:54,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256811248] [2019-12-18 11:44:54,167 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:54,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:54,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:54,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:54,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:54,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152501701] [2019-12-18 11:44:54,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:54,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:54,869 INFO L87 Difference]: Start difference. First operand 220 states and 559 transitions. Second operand 18 states. [2019-12-18 11:44:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:56,319 INFO L93 Difference]: Finished difference Result 329 states and 779 transitions. [2019-12-18 11:44:56,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:56,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:56,320 INFO L225 Difference]: With dead ends: 329 [2019-12-18 11:44:56,321 INFO L226 Difference]: Without dead ends: 328 [2019-12-18 11:44:56,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-18 11:44:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 218. [2019-12-18 11:44:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-18 11:44:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-18 11:44:56,326 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-18 11:44:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:56,326 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-18 11:44:56,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-18 11:44:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:56,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:56,327 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:56,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:56,528 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 140 times [2019-12-18 11:44:56,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:56,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179270821] [2019-12-18 11:44:56,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:56,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179270821] [2019-12-18 11:44:56,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148592195] [2019-12-18 11:44:56,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:56,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:56,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:56,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:56,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:56,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:56,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:56,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580631760] [2019-12-18 11:44:56,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:56,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:56,767 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 18 states. [2019-12-18 11:44:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:57,095 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-18 11:44:57,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:44:57,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:57,096 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:44:57,096 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:44:57,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:44:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-18 11:44:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-18 11:44:57,102 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-18 11:44:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:57,102 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-18 11:44:57,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-18 11:44:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:57,103 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:57,103 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:57,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:57,306 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 141 times [2019-12-18 11:44:57,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:57,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784888649] [2019-12-18 11:44:57,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:57,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784888649] [2019-12-18 11:44:57,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029296825] [2019-12-18 11:44:57,386 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:57,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:57,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:57,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:57,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:57,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:57,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:57,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604929207] [2019-12-18 11:44:57,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:57,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:57,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:57,549 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 18 states. [2019-12-18 11:44:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:57,898 INFO L93 Difference]: Finished difference Result 243 states and 585 transitions. [2019-12-18 11:44:57,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:44:57,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:57,899 INFO L225 Difference]: With dead ends: 243 [2019-12-18 11:44:57,899 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:44:57,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:44:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 210. [2019-12-18 11:44:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:44:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:44:57,904 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:44:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:57,904 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:44:57,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:44:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:57,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:57,904 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:58,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:58,105 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 142 times [2019-12-18 11:44:58,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:58,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175602193] [2019-12-18 11:44:58,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:58,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175602193] [2019-12-18 11:44:58,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926623078] [2019-12-18 11:44:58,187 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:58,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:58,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:58,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:58,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:59,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:59,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:59,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202321071] [2019-12-18 11:44:59,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:59,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:59,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:59,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=224, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:44:59,149 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:00,414 INFO L93 Difference]: Finished difference Result 267 states and 633 transitions. [2019-12-18 11:45:00,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:45:00,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:00,415 INFO L225 Difference]: With dead ends: 267 [2019-12-18 11:45:00,415 INFO L226 Difference]: Without dead ends: 264 [2019-12-18 11:45:00,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=290, Invalid=638, Unknown=2, NotChecked=0, Total=930 [2019-12-18 11:45:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-18 11:45:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 211. [2019-12-18 11:45:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-18 11:45:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-18 11:45:00,419 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-18 11:45:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:00,420 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-18 11:45:00,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-18 11:45:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:00,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:00,420 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:00,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:00,621 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 143 times [2019-12-18 11:45:00,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:00,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002357274] [2019-12-18 11:45:00,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002357274] [2019-12-18 11:45:00,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092115624] [2019-12-18 11:45:00,728 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:00,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:00,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:00,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:00,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:00,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:00,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899938684] [2019-12-18 11:45:00,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:00,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:00,999 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 18 states. [2019-12-18 11:45:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:01,664 INFO L93 Difference]: Finished difference Result 264 states and 627 transitions. [2019-12-18 11:45:01,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:01,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:01,665 INFO L225 Difference]: With dead ends: 264 [2019-12-18 11:45:01,665 INFO L226 Difference]: Without dead ends: 263 [2019-12-18 11:45:01,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-18 11:45:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2019-12-18 11:45:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:01,670 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:01,670 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:01,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:01,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:01,671 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:01,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:01,876 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 144 times [2019-12-18 11:45:01,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:01,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778739300] [2019-12-18 11:45:01,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:01,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778739300] [2019-12-18 11:45:01,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780551577] [2019-12-18 11:45:01,999 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:02,046 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:45:02,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:02,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:02,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:03,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:03,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:03,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723716384] [2019-12-18 11:45:03,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:03,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:03,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:03,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:45:03,426 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:03,940 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-18 11:45:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:06,001 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2019-12-18 11:45:06,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:06,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:06,002 INFO L225 Difference]: With dead ends: 269 [2019-12-18 11:45:06,003 INFO L226 Difference]: Without dead ends: 265 [2019-12-18 11:45:06,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=318, Invalid=671, Unknown=3, NotChecked=0, Total=992 [2019-12-18 11:45:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-18 11:45:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2019-12-18 11:45:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-18 11:45:06,007 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-18 11:45:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:06,007 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-18 11:45:06,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-18 11:45:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:06,008 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:06,008 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:06,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:06,209 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 145 times [2019-12-18 11:45:06,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:06,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31588768] [2019-12-18 11:45:06,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:06,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31588768] [2019-12-18 11:45:06,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726270610] [2019-12-18 11:45:06,296 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:06,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:06,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:07,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:07,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:07,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769445634] [2019-12-18 11:45:07,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:07,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=223, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:45:07,915 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-18 11:45:09,171 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:45:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:09,395 INFO L93 Difference]: Finished difference Result 302 states and 698 transitions. [2019-12-18 11:45:09,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:09,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:09,397 INFO L225 Difference]: With dead ends: 302 [2019-12-18 11:45:09,397 INFO L226 Difference]: Without dead ends: 300 [2019-12-18 11:45:09,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=312, Invalid=677, Unknown=3, NotChecked=0, Total=992 [2019-12-18 11:45:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-18 11:45:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2019-12-18 11:45:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-18 11:45:09,402 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-18 11:45:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:09,402 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-18 11:45:09,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-18 11:45:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:09,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:09,402 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:09,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:09,603 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 146 times [2019-12-18 11:45:09,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:09,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73620484] [2019-12-18 11:45:09,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:09,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73620484] [2019-12-18 11:45:09,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308598570] [2019-12-18 11:45:09,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:09,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:09,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:09,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:09,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:09,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:09,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:09,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996695293] [2019-12-18 11:45:09,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:09,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:09,850 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-18 11:45:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:10,375 INFO L93 Difference]: Finished difference Result 287 states and 672 transitions. [2019-12-18 11:45:10,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:10,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:10,376 INFO L225 Difference]: With dead ends: 287 [2019-12-18 11:45:10,376 INFO L226 Difference]: Without dead ends: 286 [2019-12-18 11:45:10,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-18 11:45:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 210. [2019-12-18 11:45:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:10,381 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:10,381 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:10,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:10,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:10,382 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:10,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:10,582 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 147 times [2019-12-18 11:45:10,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:10,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295441773] [2019-12-18 11:45:10,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:10,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295441773] [2019-12-18 11:45:10,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592873594] [2019-12-18 11:45:10,660 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:10,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:10,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:10,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:10,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:12,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:12,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:12,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796726430] [2019-12-18 11:45:12,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:12,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:45:12,165 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:12,653 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2019-12-18 11:45:14,879 WARN L192 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:45:15,055 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:45:15,877 WARN L192 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 11:45:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:16,019 INFO L93 Difference]: Finished difference Result 279 states and 650 transitions. [2019-12-18 11:45:16,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:45:16,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:16,020 INFO L225 Difference]: With dead ends: 279 [2019-12-18 11:45:16,020 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 11:45:16,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=371, Invalid=814, Unknown=5, NotChecked=0, Total=1190 [2019-12-18 11:45:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 11:45:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 213. [2019-12-18 11:45:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-18 11:45:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-18 11:45:16,026 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-18 11:45:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:16,026 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-18 11:45:16,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-18 11:45:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:16,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:16,027 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:16,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:16,230 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 148 times [2019-12-18 11:45:16,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:16,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212729019] [2019-12-18 11:45:16,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:16,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212729019] [2019-12-18 11:45:16,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063473802] [2019-12-18 11:45:16,313 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:16,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:16,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:16,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:16,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:21,601 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:45:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:21,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:21,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:21,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179780813] [2019-12-18 11:45:21,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:21,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:21,603 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 18 states. [2019-12-18 11:45:23,957 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:45:24,413 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 11:45:27,005 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 11:45:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:31,423 INFO L93 Difference]: Finished difference Result 300 states and 693 transitions. [2019-12-18 11:45:31,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:31,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:31,424 INFO L225 Difference]: With dead ends: 300 [2019-12-18 11:45:31,424 INFO L226 Difference]: Without dead ends: 299 [2019-12-18 11:45:31,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=331, Invalid=723, Unknown=2, NotChecked=0, Total=1056 [2019-12-18 11:45:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-12-18 11:45:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 212. [2019-12-18 11:45:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-18 11:45:31,429 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-18 11:45:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:31,429 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-18 11:45:31,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-18 11:45:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:31,430 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:31,430 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:31,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:31,633 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 149 times [2019-12-18 11:45:31,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:31,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545430711] [2019-12-18 11:45:31,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:31,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545430711] [2019-12-18 11:45:31,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453161319] [2019-12-18 11:45:31,718 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:31,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:31,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:31,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:31,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:33,869 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:45:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:33,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:33,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:33,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988927646] [2019-12-18 11:45:33,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:33,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:33,871 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-18 11:45:34,387 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 11:45:34,586 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 11:45:35,498 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-12-18 11:45:35,914 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-12-18 11:45:36,446 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:45:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:37,992 INFO L93 Difference]: Finished difference Result 330 states and 756 transitions. [2019-12-18 11:45:37,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:37,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:37,994 INFO L225 Difference]: With dead ends: 330 [2019-12-18 11:45:37,994 INFO L226 Difference]: Without dead ends: 328 [2019-12-18 11:45:37,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=302, Invalid=626, Unknown=2, NotChecked=0, Total=930 [2019-12-18 11:45:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-18 11:45:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 215. [2019-12-18 11:45:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-18 11:45:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 548 transitions. [2019-12-18 11:45:37,998 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 548 transitions. Word has length 14 [2019-12-18 11:45:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:37,998 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 548 transitions. [2019-12-18 11:45:37,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 548 transitions. [2019-12-18 11:45:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:37,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:37,999 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:38,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:38,209 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 150 times [2019-12-18 11:45:38,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:38,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922467590] [2019-12-18 11:45:38,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:38,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922467590] [2019-12-18 11:45:38,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380070856] [2019-12-18 11:45:38,289 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:38,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:38,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:38,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:38,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:39,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:39,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:39,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889845108] [2019-12-18 11:45:39,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:39,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:39,470 INFO L87 Difference]: Start difference. First operand 215 states and 548 transitions. Second operand 18 states. [2019-12-18 11:45:41,280 WARN L192 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 11:45:41,905 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:45:42,658 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 11:45:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:42,728 INFO L93 Difference]: Finished difference Result 317 states and 730 transitions. [2019-12-18 11:45:42,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:42,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:42,730 INFO L225 Difference]: With dead ends: 317 [2019-12-18 11:45:42,730 INFO L226 Difference]: Without dead ends: 315 [2019-12-18 11:45:42,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-12-18 11:45:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 213. [2019-12-18 11:45:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-18 11:45:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-18 11:45:42,735 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-18 11:45:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:42,735 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-18 11:45:42,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-18 11:45:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:42,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:42,735 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:42,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,936 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 151 times [2019-12-18 11:45:42,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:42,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123932215] [2019-12-18 11:45:42,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:43,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123932215] [2019-12-18 11:45:43,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906758486] [2019-12-18 11:45:43,023 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:43,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:43,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:44,753 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:45:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:44,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:44,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:44,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578654211] [2019-12-18 11:45:44,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:44,756 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 18 states. [2019-12-18 11:45:45,158 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2019-12-18 11:45:45,666 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:45:45,911 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-12-18 11:45:47,649 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 11:45:49,558 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:45:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:50,533 INFO L93 Difference]: Finished difference Result 315 states and 729 transitions. [2019-12-18 11:45:50,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:50,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:50,534 INFO L225 Difference]: With dead ends: 315 [2019-12-18 11:45:50,534 INFO L226 Difference]: Without dead ends: 314 [2019-12-18 11:45:50,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=391, Invalid=796, Unknown=3, NotChecked=0, Total=1190 [2019-12-18 11:45:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-12-18 11:45:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 210. [2019-12-18 11:45:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:50,539 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:50,539 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:50,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:50,539 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:50,540 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:50,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:50,743 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:50,743 INFO L82 PathProgramCache]: Analyzing trace with hash -734344360, now seen corresponding path program 152 times [2019-12-18 11:45:50,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:50,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832403192] [2019-12-18 11:45:50,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:50,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832403192] [2019-12-18 11:45:50,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399062909] [2019-12-18 11:45:50,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:50,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:50,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:50,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:50,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:51,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:51,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:51,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723763122] [2019-12-18 11:45:51,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:51,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:51,001 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:51,754 INFO L93 Difference]: Finished difference Result 257 states and 608 transitions. [2019-12-18 11:45:51,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:51,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:51,758 INFO L225 Difference]: With dead ends: 257 [2019-12-18 11:45:51,758 INFO L226 Difference]: Without dead ends: 251 [2019-12-18 11:45:51,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-18 11:45:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2019-12-18 11:45:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:45:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 542 transitions. [2019-12-18 11:45:51,762 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 542 transitions. Word has length 14 [2019-12-18 11:45:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:51,762 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 542 transitions. [2019-12-18 11:45:51,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 542 transitions. [2019-12-18 11:45:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:51,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:51,763 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:51,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:51,963 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 153 times [2019-12-18 11:45:51,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:51,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689855308] [2019-12-18 11:45:51,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689855308] [2019-12-18 11:45:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273101503] [2019-12-18 11:45:52,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:52,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:52,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:52,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:52,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:00,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:00,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:46:00,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318528949] [2019-12-18 11:46:00,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:46:00,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:46:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:46:00,425 INFO L87 Difference]: Start difference. First operand 214 states and 542 transitions. Second operand 18 states. Received shutdown request... [2019-12-18 11:46:03,082 WARN L209 SmtUtils]: Removed 4 from assertion stack [2019-12-18 11:46:03,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:46:03,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:03,283 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 11:46:03,287 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 11:46:03,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:46:03 BasicIcfg [2019-12-18 11:46:03,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:46:03,288 INFO L168 Benchmark]: Toolchain (without parser) took 292336.39 ms. Allocated memory was 137.4 MB in the beginning and 156.8 MB in the end (delta: 19.4 MB). Free memory was 99.3 MB in the beginning and 112.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,289 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.34 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 98.9 MB in the beginning and 161.0 MB in the end (delta: -62.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.39 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 159.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,289 INFO L168 Benchmark]: Boogie Preprocessor took 26.35 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,290 INFO L168 Benchmark]: RCFGBuilder took 385.76 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 137.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:03,290 INFO L168 Benchmark]: TraceAbstraction took 291157.45 ms. Allocated memory was 201.9 MB in the beginning and 156.8 MB in the end (delta: -45.1 MB). Free memory was 137.2 MB in the beginning and 112.6 MB in the end (delta: 24.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:46:03,292 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 699.34 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 98.9 MB in the beginning and 161.0 MB in the end (delta: -62.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.39 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 159.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.35 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.76 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 137.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 291157.45 ms. Allocated memory was 201.9 MB in the beginning and 156.8 MB in the end (delta: -45.1 MB). Free memory was 137.2 MB in the beginning and 112.6 MB in the end (delta: 24.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (214states) and FLOYD_HOARE automaton (currently 10 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 46 for 2080ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 291.0s, OverallIterations: 168, TraceHistogramMax: 7, AutomataDifference: 160.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1605 SDtfs, 23061 SDslu, 13365 SDs, 0 SdLazy, 7329 SolverSat, 4175 SolverUnsat, 26 SolverUnknown, 0 SolverNotchecked, 38.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4591 GetRequests, 815 SyntacticMatches, 17 SemanticMatches, 3758 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 21807 ImplicationChecksByTransitivity, 199.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 167 MinimizatonAttempts, 8696 StatesRemovedByMinimization, 164 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 85.4s InterpolantComputationTime, 4197 NumberOfCodeBlocks, 4197 NumberOfCodeBlocksAsserted, 546 NumberOfCheckSat, 3866 ConstructedInterpolants, 166 QuantifiedInterpolants, 451411 SizeOfPredicates, 6 NumberOfNonLiveVariables, 15115 ConjunctsInSsa, 1777 ConjunctsInUnsatCore, 331 InterpolantComputations, 7 PerfectInterpolantSequences, 42/2494 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown